CN207424728U - A kind of On-off signal exports multiplex interface circuit - Google Patents
A kind of On-off signal exports multiplex interface circuit Download PDFInfo
- Publication number
- CN207424728U CN207424728U CN201721591037.1U CN201721591037U CN207424728U CN 207424728 U CN207424728 U CN 207424728U CN 201721591037 U CN201721591037 U CN 201721591037U CN 207424728 U CN207424728 U CN 207424728U
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal
- terminal
- output
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model discloses a kind of On-off signals to export multiplex interface circuit, for being connected between On-off signal leading-out terminal and control unit, including：Switching value input circuit and switching value output circuit, switching value input circuit, which includes threshold value, can set circuit and level indicating circuit, threshold value can set circuit for setting the On-off signal signal of a detection threshold value and acquisition less than detection threshold value and being output to control unit, and level indicating circuit is for for On-off signal leading-out terminal providing level indicating function；Switching value output circuit is for switching value output signal of the reception from control unit and feeds back to switching value input circuit, switching value output signal, which is still exported, so as to fulfill either acquisition On-off signal signal all shares same terminal, the terminal is provided with level indicating function, can it is user-friendly and use, adjustment can also be configured at any time to the detection threshold value of input signal, and circuit is simple, can effectively reduce cost.
Description
Technical field
The utility model is related to apparatus for controlling elevator fields, relate more specifically to a kind of On-off signal output multiplex interface
Circuit.
Background technology
At present, general elevator special converter for on-off model input, output all be using different circuits into
Row processing, i.e., switching value input circuit is independent from each other with switching value output circuit, On-off signal terminal and switching value
Leading-out terminal is also independent from each other, for example, when having m digital output modul button, while need to set m On-off signal end
Son and m output switch parameter terminal, therefore, single button switch for elevator amount input and output need to use the special frequency conversion of elevator respectively
An external terminal in device expansion board, it is more to be easy to cause external input, leading-out terminal, and internal circuit wiring is complicated, increases
Add hardware cost, occupy additional hardware volume, manufacture cost is higher, and expansion board external terminal is connected with elevator button
When, it is necessary to user tells input terminal and leading-out terminal, be easy to cause error, regular maintenance cost is higher.In the prior art
It has designed and has provided a kind of double optocoupler input and output multiplexing schemes, although the program realizes single button switch for elevator amount input
Output is only needed using an external terminal in elevator special converter expansion board, but program circuit is complicated, is used
Device it is more, be susceptible to failure, manufacture cost is also higher, and can not be to the high level of the On-off signal signal of acquisition
It is configured adjustment.
Therefore, how to design provide the low cost that a kind of detection threshold of input high level can set On-off signal it is defeated
Go out multiplex interface circuit, can realize the time-sharing multiplex of switching value input interface circuit and output switch parameter interface circuit,
So that it is all to use same terminal that either input switch amount signal, which still exports on-off model, and it can effectively simplify electricity
Circuit devcie is reduced on road, reduces manufacture cost and maintenance cost, and during multiplex switch amount input interface circuit, it can be to input
The detection threshold value of signal is configured adjustment at any time, is the technical issues of those skilled in the art are urgently to be resolved hurrily.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of On-off signals to export multiplex interface circuit, the party
The acquisition of single switch amount signal shares same terminal with output in case, which is provided with level indicating function, can facilitate use
Family operates and uses, and the component used is less, and circuit is simple, can effectively simplify circuit, reduces circuit devcie, reduces system
Cause this and follow-up equipment maintenance cost；It, can be to the detection threshold of input signal and during multiplex switch amount input interface circuit
Value is configured adjustment at any time.
In order to solve the above-mentioned technical problem, the utility model provides a kind of On-off signal output multiplex interface circuit, uses
In being connected between an On-off signal leading-out terminal and a control unit, wherein, the On-off signal exports multiplex interface
Circuit includes a switching value input circuit and a switching value output circuit, and the switching value input circuit, which includes a threshold value, to be set
Circuit and a level indicating circuit, the threshold value can set circuit for set a detection threshold value and acquisition be less than the inspection
It surveys the On-off signal signal of threshold value and is output to described control unit, the level indicating circuit is used for as the switching value
Input and output terminal provides level indicating function；The switching value output circuit is for switch of the reception from described control unit
Amount output signal simultaneously feeds back to the switching value input circuit.
In On-off signal provided by the utility model exports multiplex interface circuit, the threshold value, which can set circuit, to be included
One biasing resistor, a voltage-stabiliser tube, a pull down resistor, one are by the output terminal of the biasing resistor coupled to the cathode of the voltage-stabiliser tube
Bias node and one by the anode of the voltage-stabiliser tube coupled to the pull down resistor input terminal pull-down node, wherein, institute
The power supply that the input terminal of biasing resistor is stated with On-off signal output multiplex interface circuit is connected, output terminal with it is described partially
It puts node to be connected, for providing bias current for the voltage-stabiliser tube, to ensure when the voltage-stabiliser tube is in running order, for institute
It states bias node and one preset potential is provided；The anode of the voltage-stabiliser tube is connected with the pull-down node, cathode with it is described partially
It puts node to be connected, for setting the current potential of the bias node；The input terminal of the pull down resistor is connected with the pull-down node,
Its output head grounding, for when the voltage-stabiliser tube ending, the pull-down node being pulled down and is grounded.
In On-off signal provided by the utility model exports multiplex interface circuit, the detection threshold value saves for biasing
The preset potential of point, the detection threshold value can be set by the mutual cooperation of biasing resistor, voltage-stabiliser tube and pull down resistor.
In On-off signal provided by the utility model exports multiplex interface circuit, the level indicating circuit includes one
Isolating diode and a light emitting diode, wherein, the anode of the isolating diode is connected with the bias node, cathode with
The anode of the light emitting diode is connected, and plays the role of isolation for the conducting of the backward voltage to the light emitting diode；
The anode of the light emitting diode is connected with the cathode of the isolating diode, cathode and the On-off signal leading-out terminal
It is connected, is used to indicate the level state of the On-off signal leading-out terminal.
In On-off signal provided by the utility model exports multiplex interface circuit, the switching value input circuit also wraps
Include a high level clamp circuit and one output terminal of the high level clamp circuit is anti-coupled to the level indicating circuit
To the clamper node of input terminal, the high level clamp circuit is used for institute when the switching value output circuit input low level
Clamper node clamper is stated in high level state, the clamper node is connected with the On-off signal leading-out terminal.
In On-off signal provided by the utility model exports multiplex interface circuit, the switching value input circuit also wraps
One first filter circuit is included, the input terminal of first filter circuit is connected with described control unit input terminal, output termination
Ground for preventing the On-off signal signal of acquisition of the external environment to described control unit from generating electromagnetic interference, and then causes
The jitter.
In On-off signal provided by the utility model exports multiplex interface circuit, the switching value output circuit includes
One switching tube, the control terminal of the switching tube are connected with the output terminal of described control unit, and input terminal and the switching value are defeated
Enter leading-out terminal to be connected, output head grounding, be converted by the way that the switching tube on or off is controlled to complete output level.
In On-off signal provided by the utility model exports multiplex interface circuit, the switching value output circuit also wraps
One first shunt circuit, one second shunt circuit are included, wherein, one end of first shunt circuit is connected with the control terminal,
Its other end is connected with the output terminal of described control unit, for the control terminal when the switching tube turns on for the switching tube
It shunts to prevent the control terminal electric current excessive；One end of second shunt circuit is connected with the input terminal, the other end
Be connected with the On-off signal leading-out terminal, for the input terminal when the switching tube turns on for the switching tube shunt with
Prevent that the input terminal electric current is excessive.
In On-off signal provided by the utility model exports multiplex interface circuit, the switching value output circuit also wraps
A low level clamp circuit and one second filter circuit are included, wherein, one end and the control terminal of the low level clamp circuit
It is connected, other end ground connection, for fixing the current potential of the control terminal to ensure the switching tube reliable turn-off；Second filter
One end of wave circuit is connected with the control terminal, other end ground connection, for preventing external environment from generating electricity to the control terminal
Magnetic disturbance and the switching tube is caused to malfunction.
In On-off signal provided by the utility model exports multiplex interface circuit, the On-off signal output multiplexing
Interface circuit further includes an overvoltage crowbar and one the 3rd filter circuit, wherein, the input terminal of the overvoltage crowbar with
The On-off signal leading-out terminal is connected, output head grounding, for preventing the On-off signal leading-out terminal from inputting
High voltage or negative voltage damage the On-off signal output multiplex interface circuit；The input terminal of 3rd filter circuit and institute
It states On-off signal leading-out terminal to be connected, output head grounding, for preventing external environment to the On-off signal output terminal
The On-off signal signal of son input generates electromagnetic interference, and then causes input signal unstable.
Compared with prior art, a kind of On-off signal output multiplex interface circuit provided by the utility model passes through setting
The On-off signal signal that one switching value input circuit and a switching value output circuit gather On-off signal leading-out terminal
Control unit is transferred to, receive from described control unit switching value output signal and feeds back to the switching value input circuit；
The switching value input circuit, which includes a threshold value, can set circuit and a level indicating circuit, and the threshold value can set circuit use
In set a detection threshold value and acquisition less than the detection threshold value On-off signal signal and to be output to the control single
Member, the level indicating circuit are used to provide level indicating function for the On-off signal leading-out terminal.Therefore, the program can
All it is to share an external terminal to realize the acquisition to single switch amount signal and export, which is additionally provided with level
It indicates function, can be user-friendly and uses, the component that On-off signal output multiplex interface circuit uses is less, electricity
Road is simple, is effectively simplified circuit, reduces circuit devcie, greatly reduces manufacture cost and follow-up equipment maintenance cost；And
During multiplex switch amount input interface circuit, adjustment can be configured at any time to the detection threshold value of input signal.
By following description and with reference to attached drawing, the utility model will become more fully apparent, these attached drawings are used to explain this
The embodiment of utility model.
Description of the drawings
Fig. 1 is that a kind of signal processing of On-off signal output multiplex interface circuit of the utility model flows to block diagram；
Fig. 2 is a kind of frame principle figure of On-off signal output multiplex interface circuit of the utility model；
Fig. 3 is a kind of physical circuit figure of On-off signal output multiplex interface circuit of the utility model.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, the technical solution in embodiment is carried out clear, complete
Ground describes, and similar reference numerals represent similar component in attached drawing.Obviously, will be described below embodiment is only this practicality
New part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, ordinary skill people
Member's all other embodiments obtained without creative efforts belong to the model of the utility model protection
It encloses.
It should be appreciated that ought use in this specification and in the appended claims, term " comprising " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but it is not precluded from one or more of the other feature, whole
Body, step, operation, element, component and/or its presence or addition gathered.
It is also understood that herein term as used in this specification merely for the sake of description specific embodiment purpose and
It is not intended to limit the present invention.As description of the invention and it is used in the attached claims, unless context
Other situations are clearly indicated, otherwise " one " of singulative, "one" and "the" are intended to include plural form.
It will be further appreciated that the term "and/or" used in this specification and in the appended claims refers to phase
Any combinations and all possible combinations of one or more of the item listed are associated, and including these combinations.
A kind of On-off signal output multiplex interface circuit of the utility model is used to adopt On-off signal leading-out terminal
The On-off signal signal transmission of collection is received and exported after the On-off signal signal of control unit processing acquisition to control unit
Switching value output signal simultaneously feeds back to the switching value input circuit.In the examples below, the On-off signal is exported
Multiplex interface circuit is referred to as multiplex interface circuit.The multiplex interface circuit includes a switching value input circuit and a switching value is defeated
Go out circuit, switching value input circuit simultaneously with the power supply of the multiplex interface circuit, the input terminal of control unit and On-off signal
Leading-out terminal is connected, and can set circuit and a level indicating circuit including a threshold value, the threshold value can set circuit and be used for
It sets a detection threshold value and acquisition is less than the On-off signal signal of the detection threshold value and is output to described control unit,
The level indicating circuit is used to provide level indicating function for the On-off signal leading-out terminal；Switching value output circuit is same
When be connected with the ground wire of the output terminal of control unit, On-off signal leading-out terminal and interface circuit, for receiving from described
Control unit switching value output signal simultaneously feeds back to the switching value input circuit, so as to fulfill On-off signal is either gathered
Signal still exports switching value output signal all using same terminal, can effectively simplify circuit, reduce circuit devcie, reduce manufacture
And maintenance cost.
Fig. 1 is referred to, is a kind of signal processing flow direction of On-off signal output multiplex interface circuit of the utility model
Block diagram, the On-off signal output multiplex interface circuit 100 are used to be connected to On-off signal leading-out terminal and control unit
Between, including switching value input circuit 11 and switching value output circuit 12, the switching value input circuit 11 simultaneously with the multiplexing
The power supply of interface circuit 100, the input terminal of described control unit 13 and the On-off signal leading-out terminal 14 are connected, the switch
Amount input circuit 11 can be by the low and high level of the input of the On-off signal leading-out terminal 14 to determine whether there is described open
Pass amount input signal input, which, which includes a threshold value, can set 111 and one level indicating circuit of circuit
112, the threshold value can set circuit 111 simultaneously with the power supply of the multiplex interface circuit 100, ground wire, described control unit 13
Input terminal, the positive input of level indicating circuit 112 are connected, for setting a detection threshold value and acquisition less than detection threshold
The On-off signal signal output of value is to control unit；The positive input of the level indicating circuit 112 can with the threshold value
If circuit 111 is connected, positive output terminal is connected with the On-off signal leading-out terminal 14, for for the On-off signal
Leading-out terminal 14 provides level indicating function；The switching value output circuit 12 simultaneously with the output terminal of described control unit 13,
The ground wire of the On-off signal leading-out terminal 14 and the multiplex interface circuit 100 is connected, single from the control for receiving
First switching value output signal simultaneously feeds back to the switching value input circuit.In some feasible embodiments, multiplex interface electricity
The power supply on road 100 is usually 24V, which is generally used in elevator communication plate project.
Fig. 2 is referred to, Fig. 2 is a kind of frame principle figure of On-off signal output multiplex interface circuit of the utility model.
The On-off signal output multiplex interface circuit 100 includes switching value input circuit 11, switching value output circuit 12, overvoltage guarantor
15 and the 3rd filter circuit 16 of protection circuit.
The switching value input circuit 11, which includes a threshold value, can set 111 and one level indicating circuit 112 of circuit, at some
In feasible embodiment, such as in the present embodiment, the switching value input circuit 11 further includes high level clamp circuit 113, one
By the output terminal of the high level clamp circuit 113 coupled to the clamper section of the reverse input end of the level indicating circuit 112
Point c and the first filter circuit 114.
The threshold value can set circuit 111 simultaneously with the power supply of the multiplex interface circuit 100, the level indicating circuit 112,
The input terminal of described control unit 13 and the ground wire of multiplex interface circuit 100 are connected, for setting a detection threshold value and acquisition
Less than detection threshold value On-off signal signal and be output to control unit 13.When the switching value input circuit 11 gathers institute
It is determined as the On-off signal leading-out terminal input high electricity when stating the voltage value of On-off signal signal higher than detection threshold value
It is flat, it is determined as the On-off signal leading-out terminal input low level when less than detection threshold value, this programme can be by this
Threshold value can set On-off signal signal of the acquisition of circuit 111 less than the detection threshold value and be output to described control unit 13.
For example, when it is 9.2V to set the detection threshold value, when the voltage value for gathering the On-off signal signal is less than 9.2V, sentence
The fixed On-off signal leading-out terminal input low level carries out input processing to the On-off signal signal, transmits it to
The On-off signal leading-out terminal is multiplexed with leading-out terminal by the input terminal of described control unit 13；Conversely, when described in acquisition
When the voltage value of On-off signal signal is higher than 9.2V, the On-off signal leading-out terminal input high level is judged, not to this
Signal carries out respective handling, and the On-off signal leading-out terminal is still used as input terminal.The detection threshold value is for effective
The antijamming capability of the multiplex interface circuit 100 is improved to enhance the reliability and stability of circuit.Due to multiplex interface electricity
Road 100 is commonly applied in the stronger apparatus for controlling elevator of electromagnetic field, ideally, the On-off signal leading-out terminal conduct
The voltage value of the On-off signals signal such as the signal of the elevator button of input terminal acquisition and the status feedback signal of limit switch
For 0V, but due to the electromagnetic action of electromagnetic field, easily the status feedback signal of the signal to elevator button and limit switch generates
The interference of 0-5V.For example, due to the effect of electromagnetic field, the voltage value of the input signal of the multiplex interface circuit 100 acquisition is 1V,
If but the detection threshold value setting value is 1V, which can the mistake judgement On-off signal output terminal
Sub- input high level, and high level is accordingly exported to described control unit 13, and then elevator is caused not believed the input collected
Number carry out corresponding operating, but the input signal of the very possible acquisition is useful signal, the family that comes in handy by the elevator button,
But since electromagnetic interference causes the apparatus for controlling elevator not do any corresponding operation.Therefore, it is necessary to the level to input signal
An effective detection threshold value is set, so as to avoid elevator maloperation due to electromagnetic interference, the multiplexing can be effectively improved
The antijamming capability of interface circuit 100 is conducive to enhance the reliability and stability of circuit.In some feasible embodiments,
Such as in the present embodiment, the detection threshold value is set as 9.2V.In other feasible embodiments, the detection threshold value
Setting can be adjusted according to the concrete condition of application scenarios and apparatus for controlling elevator, can also be according to user's actual need
It adjusts accordingly.In some feasible embodiments, such as in the present embodiment, the power values of the multiplex interface circuit 100 are
24V。
The input terminal of the level indicating circuit 112 can set circuit 111 with the threshold value and be connected, output terminal with it is described
On-off signal leading-out terminal 14 is connected, can be square for providing level indicating function for the On-off signal leading-out terminal 14
Just user's operation and use.The power supply phase of the input terminal of the high level clamp circuit 113 and the multiplex interface circuit 100
Even, output terminal is connected with the clamper node c, for when 12 input low level of switching value output circuit by the pincers
In high level state, clamper node c's position node c clampers is connected with the On-off signal leading-out terminal 14.Described first
The input terminal of filter circuit 114 is connected with 13 input terminal of described control unit, output head grounding, for preventing external environment pair
The On-off signal signal that described control unit 13 gathers generates electromagnetic interference, and then causes the On-off signal swinging of signal
It is fixed.
The switching value output circuit 12 includes a switching tube 121, and the control terminal of the switching tube 121 and the control are single
The output terminal of member 13 is connected, and input terminal is connected with the On-off signal leading-out terminal 14, and output head grounding passes through control
The switching tube on or off is converted to complete output level.In some feasible embodiments, such as in the present embodiment, institute
Switching tube 121 is stated as NPN triode, the control terminal of the base stage of the NPN triode as switching tube 121, collector conduct is opened
Close the input terminal of pipe 121, output terminal of the emitter as switching tube 121.
The switching value output circuit 12 further includes the first shunt circuit 122, the second shunt circuit 123, low level clamper
124 and second filter circuit 125 of circuit, wherein, one end of first shunt circuit 122 and the control terminal phase of the switching tube
Even, the other end is connected with the output terminal of described control unit 13, for being the switching tube when the switching tube 121 turns on
121 control terminal shunts to prevent the control terminal electric current excessive；One end of second shunt circuit 123 and the switching tube
Input terminal be connected, the other end is connected with the On-off signal leading-out terminal 14, for being when the switching tube turns on
The input terminal of the switching tube 121 shunts to prevent the input terminal electric current excessive；One end of the low level clamp circuit 124
It is connected with the control terminal, other end ground connection, for fixing the control terminal potential of the switching tube 121 to ensure the switch
Pipe 121 can reliable turn-off；One end of second filter circuit 125 is connected with the control terminal, other end ground connection, for preventing
Only external environment generates electromagnetic interference to the control terminal and the switching tube 121 is caused to malfunction.
The reverse input end of the overvoltage crowbar 15 is connected with the On-off signal leading-out terminal 14, reversely defeated
Outlet is grounded, for preventing that the On-off signal leading-out terminal 14 from inputting too high voltages or the negative voltage damage switching value is defeated
Enter to export multiplex interface circuit 100；The input terminal of 3rd filter circuit 16 and 14 phase of On-off signal leading-out terminal
Even, output head grounding, for preventing external environment from believing the On-off signal that the On-off signal leading-out terminal 14 inputs
Number electromagnetic interference is generated, and then cause the On-off signal jitter.
In the above-described embodiments, design provides a kind of switch for the low cost that detection threshold value of input signal can be set
Input and output multiplex interface circuit 100 is measured, the program can realize that the acquisition of single switch amount signal is opened with exporting shared one
Input and output terminal 14 is measured in pass, and the component used is less, and circuit is simple, so as to effectively simplify circuit, reduce circuit devcie,
Reduce manufacture cost and follow-up equipment maintenance cost；The acquisition of circuit 111 can also can be set by the threshold value less than a detection
The On-off signal signal of threshold value is simultaneously output to described control unit 13, so as to effectively improve the antijamming capability of circuit
And the reliability and stability of enhancing circuit；Can also the On-off signal be indicated by the level indicating circuit 112
The level conditions of leading-out terminal 14, user-friendly and use.
Fig. 3 is referred to, Fig. 3 is a kind of physical circuit figure of On-off signal output multiplex interface circuit of the utility model.
The On-off signal output multiplex interface circuit 100 includes switching value input circuit 11, switching value output circuit 12, overvoltage guarantor
15 and the 3rd filter circuit 16 of protection circuit.
The switching value input circuit 11, which includes a threshold value, can set 111 and one level indicating circuit 112 of circuit, at some
In feasible embodiment, such as in the present embodiment, the switching value input circuit 11 further includes high level clamp circuit 113, one
By the output terminal of the high level clamp circuit 113 coupled to the clamper section of the reverse input end of the level indicating circuit 112
Point c and the first filter circuit 114.
The threshold value can set circuit 111 simultaneously with the power supply of the multiplex interface circuit 100, the level indicating circuit 112,
The input terminal of described control unit 13 and the ground wire of multiplex interface circuit 100 are connected, for setting a detection threshold value and acquisition
Less than detection threshold value On-off signal signal and be output to control unit 13.When the switching value input circuit 11 gathers institute
It is determined as the On-off signal leading-out terminal input high electricity when stating the voltage value of On-off signal signal higher than detection threshold value
It is flat, it is determined as the On-off signal leading-out terminal input low level when less than detection threshold value, this programme can be by this
Threshold value can set On-off signal signal of the acquisition of circuit 111 less than the detection threshold value and be output to described control unit 13.
For example, when it is 9.2V to set the detection threshold value, when the voltage value for gathering the On-off signal signal is less than 9.2V, sentence
The fixed On-off signal leading-out terminal input low level carries out input processing to the On-off signal signal, transmits it to
The On-off signal leading-out terminal is multiplexed with leading-out terminal by the input terminal of described control unit 13；Conversely, when described in acquisition
When the voltage value of On-off signal signal is higher than 9.2V, the On-off signal leading-out terminal input high level is judged, not to this
Signal carries out respective handling, and the On-off signal leading-out terminal is still used as input terminal.The detection threshold value is for effective
The antijamming capability of the multiplex interface circuit 100 is improved to enhance the reliability and stability of circuit, in some feasible implementations
In example, such as embodiment, the detection threshold value are the current potential of bias node, pass through biasing resistor, voltage-stabiliser tube and drop-down electricity
The mutual cooperation of resistance can set the detection threshold value.Since the multiplex interface circuit 100 is commonly applied to the stronger electricity of electromagnetic field
In terraced control system, ideally, the letter for the elevator button that the On-off signal leading-out terminal is gathered as input terminal
Number and the voltage value of the On-off signals signal such as status feedback signal of limit switch be 0V, but since the electromagnetism of electromagnetic field is made
With easily the status feedback signal of the signal to elevator button and limit switch generates the interference of 0-5V.For example, due to electromagnetic field
Effect, the voltage value of the input signal of the multiplex interface circuit 100 acquisition for 1V, if but the detection threshold value setting value be
1V, then the multiplex interface circuit 100 meeting is wrong judges the On-off signal leading-out terminal input high level, the input terminal
131 be high level, and then elevator is caused not carry out corresponding operating to the input signal collected, but the very possible acquisition is defeated
Enter signal for useful signal, the family that comes in handy is by the elevator button, but since electromagnetic interference causes the apparatus for controlling elevator not
Do any corresponding operation.Therefore, it is necessary to the level to input signal to set an effective detection threshold value, so as to avoid electricity
Ladder maloperation due to electromagnetic interference can effectively improve the antijamming capability of the multiplex interface circuit 100, be conducive to enhancing electricity
The reliability and stability on road.In some feasible embodiments, such as in the present embodiment, the detection threshold value is set as
9.2V.In other feasible embodiments, the setting of the detection threshold value can be according to application scenarios and elevator controlling system
The concrete condition of system is adjusted, and can also be adjusted accordingly according to user's actual need.In some feasible embodiments,
Such as in the present embodiment, the power values of the multiplex interface circuit 100 are 24V.
In some feasible embodiments, such as in the present embodiment, which, which can set circuit 111, includes a biasing resistor
R2, a voltage-stabiliser tube Z1, a pull down resistor R3, one are by the output terminal of the biasing resistor coupled to the inclined of the cathode of the voltage-stabiliser tube
Pull-down node as of the node b and one by the anode of the voltage-stabiliser tube coupled to the input terminal of the pull down resistor is put, wherein, it is described
The input terminal of biasing resistor R2 is used to be connected with the power supply of On-off signal output multiplex interface circuit, and output terminal is used for
It is connected with the bias node b, for providing bias current for the voltage-stabiliser tube Z1, to ensure to be in work as the voltage-stabiliser tube Z1
When making state, a preset potential is provided for the bias node b；The anode of the voltage-stabiliser tube Z1 is used for and the pull-down node
A is connected, and cathode with the bias node b for being connected, for setting the current potential of the bias node；The pull down resistor R3
Input terminal for being connected with the pull-down node a, output terminal is for being grounded, for when the voltage-stabiliser tube Z1 end, general
The pull-down node a clampers are in low level state.
The input terminal of the level indicating circuit 112 can set circuit 111 with the threshold value and be connected, output terminal with it is described
On-off signal leading-out terminal 14 is connected, for providing level indicating function for the On-off signal leading-out terminal 14..One
In a little feasible embodiments, such as in the present embodiment, which includes an isolating diode D1 and one luminous two
Pole pipe LED1, wherein, the anode of the isolating diode D1 is connected with the bias node b, cathode and the light-emitting diodes
The anode of pipe LED1 is connected, and plays the role of isolation for the conducting of the backward voltage to the Light-emitting diode LED 1；It is described
The anode of Light-emitting diode LED 1 is connected with the cathode of the isolating diode D1, cathode and the On-off signal output terminal
Son 14 is connected, and is used to indicate the level state of the On-off signal leading-out terminal 14.When the On-off signal leading-out terminal is defeated
When entering low level, 1 forward conduction of Light-emitting diode LED is shinny, is less than so as to represent that the On-off signal leading-out terminal 14 has
The On-off signal signal input of one detection threshold value；When the On-off signal leading-out terminal input high level, this luminous two
Reversely cut-off does not work pole pipe LED1, so as to represent that the On-off signal leading-out terminal for 24V or vacant state, is not below an inspection
Survey the On-off signal signal input of threshold value.The On-off signal leading-out terminal 14 acquiescence is as input terminal, until having low
It is inputted in the On-off signal signal of a detection threshold value.
The input terminal of the high level clamp circuit 113 is connected with the power supply of the multiplex interface circuit 100, output terminal
Be connected with the clamper node c, for when 12 input low level of switching value output circuit by the clamper node c clampers
In high level state, since when 12 input low level of switching value output circuit, the switching tube 121 turns off, the clamper
Node c is high level by 113 clamper of high level clamp circuit.The clamper node c and the On-off signal output terminal
Son 14 is connected.In some feasible embodiments, such as in the present embodiment, which includes a pull-up electricity
R1 is hindered, one end of pull-up resistor R1 is connected with the power supply of the multiplex interface circuit 100, the other end and the clamper node c
It is connected.
The input terminal of first filter circuit 114 is connected with the input terminal 131 of described control unit 13, output termination
Ground for preventing external environment from generating electromagnetic interference to the On-off signal signal that described control unit 13 gathers, and then causes
The On-off signal jitter.In some feasible embodiments, such as in the present embodiment, first filter circuit 114
Including a filter capacitor C1, one end of the filter capacitor C1 is connected with the input terminal 131 of described control unit 13, the other end
Ground connection.
The switching value output circuit 12 from described control unit switching value output signal and is fed back to described in reception
Switching value input circuit, including a switching tube 121, the control terminal of the switching tube 121 and the output of described control unit 13
End 132 is connected, and input terminal is connected with the On-off signal leading-out terminal 14, output head grounding, by being opened described in control
Pipe on or off is closed to complete output level conversion.In some feasible embodiments, such as in the present embodiment, the switch
Pipe 121 is NPN triode, and the control terminal of the base stage of the NPN triode as switching tube 121, collector is as switching tube 121
Input terminal, output terminal of the emitter as switching tube 121.
The switching value output circuit 12 further includes the first shunt circuit 122, the second shunt circuit 123, low level clamper
124 and second filter circuit 125 of circuit, wherein, one end of first shunt circuit 122 and the control terminal phase of the switching tube
Even, the other end is connected with the output terminal 132 of described control unit 13, for being opened when the switching tube 121 turns on to be described
The control terminal for closing pipe 121 shunts to prevent the control terminal electric current excessive.In some feasible embodiments, such as the present embodiment
In, first shunt circuit 122 is current-limiting resistance R5, and one end of current-limiting resistance R5 is connected with the control terminal, another
End is connected with the output terminal 132 of described control unit 13；One end of second shunt circuit 123 and the switching tube 121
Input terminal is connected, and the other end is connected with the On-off signal leading-out terminal 14, for being when the switching tube 121 turns on
The input terminal of the switching tube 121 shunts to prevent the input terminal electric current excessive.In some feasible embodiments, such as this
In embodiment, second shunt circuit 123 is current-limiting resistance R4, one end of current-limiting resistance R4 and the switching tube 121
Input terminal is connected, and the other end is connected with the On-off signal leading-out terminal 14；One end of the low level clamp circuit 124
It is connected with the control terminal, other end ground connection, for fixing the control terminal potential of the switching tube 121 to ensure the switch
Pipe 121 can reliable turn-off.In some feasible embodiments, such as in the present embodiment, under the low level clamp circuit 124 is
Pull-up resistor R6, one end of current-limiting resistance R6 are connected with the control terminal, other end ground connection；Second filter circuit 125
One end be connected with the control terminal, the other end ground connection, for prevent external environment to the control terminal generate electromagnetic interference
And the switching tube 121 is caused to malfunction.In some feasible embodiments, such as in the present embodiment, second filtered electrical
Road 125 is filter capacitor C2, and one end of filter capacitor C2 is connected with the control terminal, other end ground connection.
The reverse input end of the overvoltage crowbar 15 is connected with the On-off signal leading-out terminal 14, reversely defeated
Outlet pole is grounded, for preventing that the On-off signal leading-out terminal 14 from inputting too high voltages or negative voltage damages the switching value
Input and output multiplex interface circuit 100.In some feasible embodiments, such as in the present embodiment, the overvoltage crowbar
15 be voltage-stabiliser tube Z2, and the cathode of voltage-stabiliser tube Z2 is connected with the On-off signal leading-out terminal 14, plus earth.
The input terminal of 3rd filter circuit 16 is connected with the On-off signal leading-out terminal 14, output termination
Ground, for preventing external environment generates electromagnetism to the On-off signal signal that the On-off signal leading-out terminal 14 inputs from doing
It disturbs, and then causes the On-off signal jitter.In some feasible embodiments, such as in the present embodiment, described
Three filter circuits 16 are filter capacitor C3, and the input terminal of filter capacitor C3 is connected with the On-off signal leading-out terminal 14,
Its output head grounding.
In the above-described embodiments, design provides a kind of switch for the low cost that detection threshold value of input signal can be set
Input and output multiplex interface circuit 100 is measured, the program can realize that the acquisition of single switch amount signal is opened with exporting shared one
Input and output terminal 14 is measured in pass, and the component used is less, and circuit is simple, so as to effectively simplify circuit, reduce circuit devcie,
Reduce manufacture cost and follow-up equipment maintenance cost；The acquisition of circuit 111 can also can be set by the threshold value less than a detection door
The On-off signal signal of limit value is simultaneously output to the input terminal 131, can also can set circuit 111 by adjusting the threshold value
The voltage value of bias node b and then realize the detection threshold value of the input signal to the On-off signal leading-out terminal 14 acquisition
It sets, so as to effectively improve the antijamming capability of circuit and enhance the reliability and stability of circuit；It can also pass through
The Light-emitting diode LED 1 of the level indicating circuit 112 indicates the level conditions of the On-off signal leading-out terminal 14, when
When Light-emitting diode LED 1 is bright, then show that the On-off signal leading-out terminal is located at low level state, conversely, then the switching value is defeated
Enter leading-out terminal for 24V high level or vacant state.
Continuing with referring to Fig. 3, multiplex interface circuit 100 is exported the following detailed description of a kind of On-off signal of the present embodiment
Operation principle.The On-off signal output multiplex interface circuit 100 includes switching value input circuit 11, switching value output circuit
12nd, 15 and the 3rd filter circuit 16 of overvoltage crowbar.The switching value input circuit 11 is used for On-off signal leading-out terminal
The On-off signal signal transmission of acquisition to control unit input terminal 131, the switching value output circuit 12 for receive come from
Described control unit switching value output signal simultaneously feeds back to the switching value input circuit, wherein,
The switching value input circuit 11, which includes a threshold value, can set 111 and one level indicating circuit 112 of circuit, at some
In feasible embodiment, such as in the present embodiment, the switching value input circuit 11 further includes high level clamp circuit 113, one
By the output terminal of the high level clamp circuit 113 coupled to the clamper section of the reverse input end of the level indicating circuit 112
Point c and the first filter circuit 114.The switching value output circuit 12 includes a switching tube 121, further includes the first shunt circuit
122nd, the second shunt circuit 123,124 and second filter circuit 125 of low level clamp circuit.
The threshold value can set circuit 111 for gather be less than the On-off signal signal of a detection threshold value, can be with
The detection threshold value is set for adjusting, the thresholding can set the voltage value of the bias node of circuit as the detection threshold value.
It is 3.3V by the voltage value for choosing suitable biasing resistor R2, voltage-stabiliser tube Z1 and the pull down resistor R3 pull-down node a,
The voltage value of the bias node b is 9.2V, and therefore, the detection threshold value is 9.2V, when the switching value input circuit
11 voltage values for collecting input signal then judge the On-off signal leading-out terminal input low level less than 9.2V, conversely,
The voltage value for collecting input signal then judges the On-off signal leading-out terminal input high level higher than 9.2V.
Input processing is carried out to the On-off signal signal of acquisition：When the switching value input circuit 11 is to the switch of acquisition
, it is necessary to the switching value output circuit 12 be bypassed, therefore, by the output terminal 132 when measuring input signal progress input processing
It is arranged to low level.When 14 input high level of On-off signal leading-out terminal, i.e., the voltage value of described clamper node c is high
In the detection threshold value, the isolating diode D1 and Light-emitting diode LED 1 of the level indicating circuit 112 reversely end, should
Light-emitting diode LED 1 do not show it is luminous, in some feasible embodiments, such as in the present embodiment, the On-off signal
Leading-out terminal is 24V high level or hanging, and the electric current of the multiplex interface circuit 100 flows through biasing resistor R2, steady by power supply 24V
Pressure pipe Z1, pull down resistor R3 are 3.3V to ground, the at this time voltage value of the pull-down node a, i.e., described input terminal 131 is high electricity
Flat, described control unit 13 detects the signal of 131 input high level of input terminal, does not do any processing to the signal, the control
The output terminal 132 of unit 13 exports low level to the switching value output circuit 12, and the On-off signal leading-out terminal will be held
The continuous signal input terminal as the multiplex interface circuit 100, until the On-off signal leading-out terminal input low level；
When 14 input low level of On-off signal leading-out terminal, i.e., described clamper node c is less than the detection threshold value, that is, inclined
When putting node b, 1 forward conduction of isolating diode D1 and Light-emitting diode LED of the level indicating circuit 112, then shine two
Pole pipe LED1 is shinny, the electric current of the multiplex interface circuit 100 by power supply 24V flow through biasing resistor R2, isolating diode D1,
Light-emitting diode LED 1, On-off signal leading-out terminal 14 and load to ground, the voltage-stabiliser tube Z1 reversely ends at this time, described defeated
Enter end 131 and be pulled down resistance R3 drop-down ground connection, therefore, which is low level, and described control unit 13 detects input
The signal of 131 input low levels is held, which is done and handles accordingly and elevator motor is controlled to perform corresponding operation, the elevator
Control output end 132 is exported high level to the switching value output circuit 12 by control system, the switching value output circuit
12 121 saturation conduction of switching tube drags down the clamper node c, and the On-off signal leading-out terminal 14 is pulled low multiplexing
For signal output terminal, until the corresponding operating of elevator button performs completion.For example, working as has user by a certain floor in elevator
Button, the On-off signal leading-out terminal 14 is at this time low level state as input terminal, the electricity of the clamper node c
It forces down in detection threshold value i.e. bias node b, 112 forward conduction of level indicating circuit, the Light-emitting diode LED 1 is sent out
Bright, the threshold value can set circuit 111 and reversely end, the lower drawknot node a drop-downs ground connection, the input terminal of described control unit
131 be low level, and this moment, the On-off signal leading-out terminal 14 will be multiplexed with leading-out terminal, until the phase of elevator button
It should operate and perform completion.Wherein, first filter circuit 114 of the switching value input circuit 11 is filter capacitor C1, is led to
The electromagnetism that crossing filter capacitor C1 can prevent that external environment from generating the On-off signal signal that described control unit 13 gathers is done
It disturbs, to ensure that the On-off signal signal stabilization inputs.
Output processing is carried out to the switching value output signal from described control unit：When the switching value output circuit 12
It is carried out to coming from 13 switching value output signal of described control unit when output is handled, it is necessary to bypass the switching value input circuit
11, therefore the switching value input circuit 11 is arranged to high-impedance state.When control unit 13 controls the output terminal 132 to export high electricity
Usually, 121 saturation conduction of switching tube, in some feasible embodiments, such as in the present embodiment, the switching tube 121
For NPN triode Q1, when the triode Q1 saturation conductions, the electric current of the multiplex interface circuit 100 is flowed by power supply 24V
Through biasing resistor R2, isolating diode D1, Light-emitting diode LED 1, current-limiting resistance R4 and triode Q1 to ground, the level refers to
Show 1 forward conduction of isolating diode D1 and Light-emitting diode LED of circuit 112, Light-emitting diode LED 1 be always maintained at it is shinny, directly
The output terminal 132 output low level is controlled to control unit 13.It is for example, low in the On-off signal leading-out terminal 14 acquisition one
After the On-off signal signal of detection threshold value, the input terminal 131 can be transferred to after input processing, the control is single
After the input terminal 131 of member 13 receives the signal less than detection threshold value, which can control described defeated
Outlet 132 exports high level, and corresponding motor is controlled to operate, until the corresponding operating of elevator button performs completion, the control
The output terminal 132 is controlled to export low level for unit 13 processed so that the switching tube turns off, and the light emitting diode reversely ends,
The On-off signal leading-out terminal 14 will be driven high the signal input terminal for being multiplexed with the multiplex interface circuit 100, wherein,
Before the corresponding operating for completing execution elevator button, it is high that described control unit 13 controls the output terminal 132 to be continued for output
Level.Further, since the current-limiting resistance R4 resistance values of the second shunt circuit 123 are much smaller than the pull-up of high level clamp circuit 113
Resistance R1, the voltage that the current-limiting resistance R4 is obtained is less, after 121 saturation conduction of switching tube, the clamper node c quilts
It drags down, the On-off signal leading-out terminal is low level, and the On-off signal leading-out terminal 14, which will be pulled low, is multiplexed with this
The signal output terminal of multiplex interface circuit 100；The voltage-stabiliser tube Z1 reversely ends, and the input terminal 131 is pulled down resistance R3
Drop-down ground connection, the input terminal 131 are low level；When the switching value output circuit 12 receives the switching value from output terminal 132
When to export signal be low level, the switching tube 121 turns off, and the voltage value of the clamper node c is pulled up as 24V, described to open
Pass amount input and output terminal is high level, and the isolating diode D1 and Light-emitting diode LED 1 of the level indicating circuit 112 are anti-
To cut-off, then Light-emitting diode LED 1 is not shinny.Meanwhile the electric current of the multiplex interface circuit 100 flows through biased electrical by power supply 24V
R2, voltage-stabiliser tube Z1 and pull down resistor R3 to ground are hindered, the voltage value of the pull-down node is 3.3V at this time, i.e., described input terminal 131
For high level, described control unit 13 detects the signal of 131 input high level of input terminal, does not do any processing to the signal,
The output terminal 132 of the control unit 13 exports low level to the switching value output circuit 12, the On-off signal output terminal
Signal input terminal of the son as the multiplex interface circuit 100.
In the above-described embodiments, design provides a kind of On-off signal output for the low cost that detection threshold value can be set
Multiplex interface circuit 100, the program can realize that the acquisition of single switch amount signal is defeated with exporting a shared On-off signal
Go out terminal 14, so as to user-friendly and use, this programme by less circuit components design realize acquisition with it is defeated
It is all to share an On-off signal leading-out terminal to go out signal, compared with double optocoupler input and output schemes of the prior art, effectively
It simplifies circuit, reduce circuit devcie, greatly reduce manufacture cost and follow-up equipment maintenance cost；Selection can also be passed through
Suitable biasing resistor R2, voltage-stabiliser tube Z1 and pull down resistor R3 can set the steady of circuit 111 to adjust to set positioned at the threshold value
The voltage value of the bias node b and pull-down node a at pressure pipe Z1 both ends, and then can be according to the actual demand of application scenarios or user
Self-defined setting is carried out to the detection threshold value of input signal, so as to effectively improve the antijamming capability of circuit and enhancing
The reliability and stability of circuit；Described open can also be indicated by the Light-emitting diode LED 1 of the level indicating circuit 112
The level conditions of input and output terminal 14 are measured in pass, when the input signal to acquisition carries out input processing, if the light-emitting diodes
Pipe LED1 is shinny, then shows 14 input low level of On-off signal leading-out terminal, conversely, the then On-off signal leading-out terminal
14 be 24V high level or vacant state.
As described above, a kind of On-off signal of the utility model exports multiplex interface circuit 100 by setting a switching value
Input circuit and a switching value output circuit realize that it is defeated that the acquisition of single switch amount signal and output all share a switching value
Enter leading-out terminal 14；When the On-off signal leading-out terminal input low level, which opens acquisition
Pass amount input signal carries out input processing, and by the input terminal 131 of treated input signal is output to control unit 13, this is defeated
Enter signal and the switching value output circuit 12 is output to by output terminal 132 after the processing of control unit 13, it is defeated so as to fulfill switching value
The time-sharing multiplex of incoming interface circuit and output switch parameter interface circuit so that either gather On-off signal signal and still export
Switching value output signal is all to share same terminal, which is provided with level indicating function, can be user-friendly and be used,
And the component that this programme uses is less, circuit is simple, can effectively simplify circuit, reduces circuit devcie, reduce manufacture cost with
Maintenance cost.The application, can be to the detection threshold value of input signal at any time while multiplex switch amount input interface circuit
Adjustment is configured, so as to effectively improve the antijamming capability of circuit and enhance the reliability and stability of circuit；Also
The level conditions of the On-off signal leading-out terminal can be indicated by Light-emitting diode LED 1.
The utility model is described above in association with preferred embodiment, but the utility model be not limited to more than take off
The embodiment shown, and the modification that various essence according to the present utility model carry out should be covered.
Claims (10)
1. a kind of On-off signal exports multiplex interface circuit, single for being connected to an On-off signal leading-out terminal and a control
Between member, which is characterized in that including：One switching value input circuit and a switching value output circuit, the On-off signal electricity
Road, which includes a threshold value, can set circuit and a level indicating circuit, the threshold value can set circuit for set a detection threshold
Value and acquisition are less than the On-off signal signal of the detection threshold value and are output to described control unit, the level indicating electricity
Road is used to provide level indicating function for the On-off signal leading-out terminal；The switching value output circuit comes from for receiving
The switching value output signal of described control unit simultaneously feeds back to the switching value input circuit.
2. On-off signal according to claim 1 exports multiplex interface circuit, it is characterised in that：The threshold value can be set
Circuit includes a biasing resistor, a voltage-stabiliser tube, a pull down resistor, one by the output terminal of the biasing resistor coupled to the voltage stabilizing
The bias node of the cathode of pipe and one by the anode of the voltage-stabiliser tube coupled to the pull down resistor input terminal pull-down node,
Wherein,
The power supply of the input terminal of the biasing resistor and the On-off signal output multiplex interface circuit is connected, output terminal with
The bias node is connected, for providing bias current for the voltage-stabiliser tube, to ensure when the voltage-stabiliser tube is in running order
When, provide a preset potential for the bias node；
The anode of the voltage-stabiliser tube is connected with the pull-down node, and cathode is connected with the bias node, described for setting
The current potential of bias node；
The input terminal of the pull down resistor is connected with the pull-down node, output head grounding, for working as the voltage-stabiliser tube cut-off
When, the pull-down node is pulled down and is grounded.
3. On-off signal according to claim 2 exports multiplex interface circuit, it is characterised in that：The detection threshold value
For the preset potential of bias node, the detection can be set by the mutual cooperation of biasing resistor, voltage-stabiliser tube and pull down resistor
Threshold value.
4. On-off signal according to claim 2 exports multiplex interface circuit, it is characterised in that：The level indicating electricity
Road includes an isolating diode and a light emitting diode, wherein,
The anode of the isolating diode is connected with the bias node, and cathode is connected with the anode of the light emitting diode,
Play the role of isolation for the conducting of the backward voltage to the light emitting diode；
The anode of the light emitting diode is connected with the cathode of the isolating diode, and cathode is exported with the On-off signal
Terminal is connected, and is used to indicate the level state of the On-off signal leading-out terminal.
5. On-off signal according to claim 1 exports multiplex interface circuit, it is characterised in that：The On-off signal
Circuit further include a high level clamp circuit and one by the output terminal of the high level clamp circuit be coupled to the level indicating
The clamper node of the reverse input end of circuit, the high level clamp circuit are used to input low electricity when the switching value output circuit
Usually by the clamper node clamper in high level state, the clamper node is connected with the On-off signal leading-out terminal.
6. On-off signal according to claim 1 exports multiplex interface circuit, it is characterised in that：The On-off signal
Circuit further includes one first filter circuit, and the input terminal of first filter circuit is connected with described control unit input terminal,
Output head grounding, for preventing the On-off signal signal of acquisition of the external environment to described control unit from generating electromagnetic interference,
And then cause the jitter.
7. On-off signal according to claim 1 exports multiplex interface circuit, it is characterised in that：The output switch parameter
Circuit includes a switching tube, and the control terminal of the switching tube is connected with the output terminal of described control unit, input terminal with it is described
On-off signal leading-out terminal is connected, output head grounding, by the way that the switching tube on or off is controlled to complete output level
Conversion.
8. On-off signal according to claim 7 exports multiplex interface circuit, it is characterised in that：The output switch parameter
Circuit further includes one first shunt circuit, one second shunt circuit, wherein,
One end of first shunt circuit is connected with the control terminal, the other end and the output terminal phase of described control unit
Connect, for shunting to prevent the control terminal electric current excessive for the control terminal of the switching tube when the switching tube turns on；
One end of second shunt circuit is connected with the input terminal, the other end and the On-off signal leading-out terminal phase
Connect, for shunting to prevent the input terminal electric current excessive for the input terminal of the switching tube when the switching tube turns on.
9. On-off signal according to claim 7 exports multiplex interface circuit, it is characterised in that：The output switch parameter
Circuit further includes a low level clamp circuit and one second filter circuit, wherein,
One end of the low level clamp circuit is connected with the control terminal, other end ground connection, for fixing the control terminal
Current potential to ensure the switching tube reliable turn-off；
One end of second filter circuit is connected with the control terminal, other end ground connection, for preventing external environment to institute
Control terminal is stated to generate electromagnetic interference and the switching tube is caused to malfunction.
10. On-off signal according to claim 1 exports multiplex interface circuit, it is characterised in that：The switching value is defeated
Enter to export multiplex interface circuit and further include an overvoltage crowbar and one the 3rd filter circuit, wherein,
The input terminal of the overvoltage crowbar is connected with the On-off signal leading-out terminal, output head grounding, for preventing
Only the On-off signal leading-out terminal input too high voltages or negative voltage damage the On-off signal output multiplex interface electricity
Road；
The input terminal of 3rd filter circuit is connected with the On-off signal leading-out terminal, output head grounding, for preventing
Only external environment generates electromagnetic interference to the On-off signal signal that the On-off signal leading-out terminal inputs, and then causes defeated
Enter jitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721591037.1U CN207424728U (en) | 2017-11-24 | 2017-11-24 | A kind of On-off signal exports multiplex interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721591037.1U CN207424728U (en) | 2017-11-24 | 2017-11-24 | A kind of On-off signal exports multiplex interface circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207424728U true CN207424728U (en) | 2018-05-29 |
Family
ID=62302906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721591037.1U Active CN207424728U (en) | 2017-11-24 | 2017-11-24 | A kind of On-off signal exports multiplex interface circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207424728U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114583834A (en) * | 2022-02-25 | 2022-06-03 | 厦门市智联信通物联网科技有限公司 | Distributed multifunctional power distribution cabinet assembly adapter device |
-
2017
- 2017-11-24 CN CN201721591037.1U patent/CN207424728U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114583834A (en) * | 2022-02-25 | 2022-06-03 | 厦门市智联信通物联网科技有限公司 | Distributed multifunctional power distribution cabinet assembly adapter device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203522773U (en) | POE power supply splitter and POE system | |
| CN111983298A (en) | Switching value acquisition circuit and method | |
| CN106841762A (en) | Zero cross detection circuit and home appliance | |
| CN102377326B (en) | Insulated gate bipolar transistor (IGBT)-bridge-switch-topology-based driving circuit and protection module thereof | |
| CN107333085A (en) | A kind of power supply unit and electric power system | |
| CN103475050B (en) | Charging circuit and the charger with this charging circuit | |
| CN207424728U (en) | A kind of On-off signal exports multiplex interface circuit | |
| CN105186444A (en) | Power supply protection circuit | |
| CN104751919B (en) | Nuclear power control stick position display system and its anti-interference display methods | |
| CN104504891B (en) | Remote control circuit and remote control | |
| CN108809197A (en) | Interleaved PFC control circuit and motor-drive circuit | |
| CN106253903B (en) | Digital quantity acquiring circuit | |
| CN210982594U (en) | Control circuit for monitoring current threshold | |
| CN105185093B (en) | Remote controler implementation method and device | |
| CN205016421U (en) | Relay switch drive arrangement and domestic appliance | |
| CN104660247B (en) | A kind of bidirectional interface circuit | |
| CN104066260B (en) | A kind of LED testing circuit and drive circuit and illuminator | |
| CN101895216B (en) | State switching circuit of wide-voltage switch | |
| CN104318964B (en) | One kind is based on nuclear power station SOE collecting methods | |
| CN206740902U (en) | Intelligent apparatus | |
| CN103475191A (en) | Control circuit of switching power supply | |
| CN204269750U (en) | Diode open-circuit testing circuit | |
| CN102694541B (en) | Loop latching circuit | |
| CN106855700B (en) | A kind of control of intelligent terminal for distribution line on-pole switch | |
| CN106224763B (en) | The monobus control device and method of LNG filling machine multimachines interconnection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |