CN105807686A - General isolating type on-off input and output module - Google Patents
General isolating type on-off input and output module Download PDFInfo
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- CN105807686A CN105807686A CN201610201515.7A CN201610201515A CN105807686A CN 105807686 A CN105807686 A CN 105807686A CN 201610201515 A CN201610201515 A CN 201610201515A CN 105807686 A CN105807686 A CN 105807686A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25458—Opto isolation, optical separation
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25461—Transformer separation
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25462—Galvanic separation, galvanic isolation
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25463—Optical separation for signals, transformer separation for power
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
Abstract
The invention discloses a general isolating type on-off input and output module which comprises a power supply filter circuit, an on-off input circuit, an in-off output circuit, a manual/automatic configuration circuit, an insolating power source, a CPLD circuit and an isolating type communicating circuit.Under the circumstance of not changing any hardware circuit and any external wiring, the module is compatible with on-off input signals of different types and on-off output requirements, the on-off input and output characteristics of different systems are met, repeated design and testing are avoided, and generality of the module is improved greatly; the on-off input and output types are configured by means of manual and automatic modes, and flexibility is good; batch production, adjusting and maintaining can be organized conveniently, and the comprehensive cost is reduced; multiple communication interfaces are provided so that the module can adapt to communicating interfaces of different systems.
Description
Technical field
The present invention relates to automation control area, be specifically related to a kind of general isolated form On-off signal output module.
Background technology
Along with the automaticity controlling equipment is more and more higher, control system needs detection and the on-the-spot variable controlled also to get more and more, the Detection & Controling of especially various isolated form switching values.It is used on the market at present detecting on-off model or switching value transmission of electricity road, different by On-off signal output type, it is divided into the output of active type On-off signal and passive switch input and output, wherein the active type On-off signal of different control systems has different input voltage ranges, user need to select corresponding input circuit and output circuit according to the type of type and input voltage range and switching value output signal that measured switch amount inputs signal, can not simultaneously compatible different input and output types and input voltage range, input circuit and output circuit are of a great variety, poor compatibility, when On-off signal signal or output signal demand adjust, original input circuit and output circuit are also required to change, add design and debugging maintenance cost, it is unfavorable for mass production.
Summary of the invention
Disadvantages described above or Improvement requirement for prior art, the invention provides a kind of general isolated form On-off signal output module, solving prior art breaker in middle amount imput output circuit can not the problem of compatible different switching value input and output type and different switching value input voltage range, provide simultaneously and input and output type circuit and multiple communication interface are set manually or automatically, it is simple to user uses and mass production.
The technical solution adopted for the present invention to solve the technical problems is: a kind of general isolated form On-off signal output module, including electric source filter circuit, for 18 36VDC DC power supplies of input are filtered, provide high quality power supply for described switching value input circuit, switching value output circuit and insulating power supply；Switching value input circuit, is used for detecting On-off signal state；Switching value output circuit, for output switch parameter；Manual/auto configuration circuit, for described switching value input circuit being arranged manually or automatically according to On-off signal type and On-off signal voltage range, for arranging the output switch parameter type of described switching value output circuit manually or automatically according to system requirements；Insulating power supply, for exporting 5VDC power supply after filtered DC power supply carries out DC-DC isolation, provides for described switching value input circuit, switching value output circuit, manual/auto configuration circuit, CPLD circuit and isolated form telecommunication circuit and controls power supply；CPLD circuit, for obtaining the switch input state information of described switching value input circuit and being uploaded to Upper system by described isolated form telecommunication circuit, for obtaining the instruction of Upper system, control the output state of described manual/auto configuration circuit and described switching value output circuit；Isolated form telecommunication circuit, mutual with the information of Upper system for realizing described CPLD circuit.
Preferably, described switching value input circuit is made up of multiple On-off signal sense channels that function is identical, described On-off signal sense channel comprises a double; two dynamic SPDT relay K 1, one input signal detection optocoupler OP1, one anti-paralleled diode D1, one range arranges circuit MR, an optical coupling secondary edges pull-up resistor Rb1, an a filter resistance Rb2 and filter capacitor C1；It is active type On-off signal or passive On-off signal that wherein said double; two dynamic SPDT relay K 1 is used for arranging On-off signal；Described range arranges circuit MR for arranging the equivalent series resistance of On-off signal sense channel, adapts to different active type On-off signal voltage range demands.
Preferably, the contact s2 of described double, two dynamic SPDT relay K 1 is connected to the anode of external switch amount input, contact a1 and contact a2 short circuit, contact b1 is connected to filtered DC power supply anode, contact b2 is connected to described DC power supply negative terminal, contact s1 is connected to described range and arranges circuit MR and be connected to the negative terminal of external switch amount input after input signal detection optocoupler OP1, the line bag side of diode side and described double, two dynamic SPDT relay K 1 that described range arranges circuit MR is connected to described manual/auto configuration circuit, the outfan of input signal detection optocoupler OP1 is connected to described CPLD circuit after Rb2 and filter capacitor C1 filters.
Further, when On-off signal type is active input, controls the line bag of described double; two dynamic SPDT relay K 1, make s1 be connected to a1, make s2 be connected to a2；When On-off signal type is passive input, controls the line bag of described double; two dynamic SPDT relay K 1, make s1 be connected to b1, make s2 be connected to b2.
Further, described range arranges circuit MR and comprises at least one alternate path, Article 1, alternate path is without series connection optocoupler, and the resistance of resistors in series should be greater than the resistor resistance of other paths connected in series, can in parallel in the quantity of path and path the resistance of resistors in series change minimum active voltage and the maximum permissible voltage of the active type On-off signal voltage of this circuit.
Further, described range arranges in circuit MR after the resistance of alternate path quantity and each alternate path resistors in series is determined, by controlling being switched on or off of optocoupler in each path, change equivalent series resistance, adapt to the demand of On-off signal signal voltage range section.
Preferably, described switching value output circuit, the multiple output switch parameter passages identical by function form, described output switch parameter passage comprises a double; two dynamic SPDT relay K 2, one for the current-limiting circuit XL1 preventing power supply from crossing a stream and output relay K3, described double; two dynamic SPDT relay K 2, being used for arranging output switch parameter is active type output switch parameter or passive output switch parameter.
Further, the contact a1 of the double; two dynamic SPDT relay K 2 stated is unsettled, the negative terminal of output switch parameter it is connected to after contact b1 and contact a2 short circuit, filtered DC power supply anode is connected with contact b2 after current-limiting circuit XL1, contact s1 is connected to DC power supply negative terminal, contact s2 is connected to the anode of output switch parameter after relay, and the line bag side of described double; two dynamic SPDT relay K 2 is connected to described manual/auto configuration circuit, and the control end of described relay K 3 is connected to described CPLD circuit.
Further, when output switch parameter type is passive output, controls the line bag of described double; two dynamic SPDT relay K 2, make s1 be connected to a1, make s2 be connected to a2；When output switch parameter type is active output, controls the line bag of described double; two dynamic SPDT relay K 2, make s1 be connected to b1, make s2 be connected to b2.
Preferably, described manual/auto configuration circuit 4, including current-limiting resistance array RXL1, for limiting the electric current of described manual/auto configuration circuit output control signal；Current-limiting resistance array RXL2, is switched to the output electric current of described CPLD circuit during manual configuration pattern for limiting described manual SP3T switches set SW3, it is prevented that described CPLD circuit is damaged；Manual SP3T switches set SW3, it is made up of multiple manual SP3Ts switch, SP3T switch tap terminals be allocated to contact 1. or contact 3. time, manual configuration for switch amount input type, output switch parameter type and On-off signal range, described SP3T switch tap terminals be allocated to contact 2. time, switch to the pattern of automatically configuring.
Further, described isolated form telecommunication circuit includes isolated form RS485 driver, isolated form CAN driver and serial fiber optical transceiver, supports RS485 communication, CAN communication and serial optical fiber communication, to adapt to the communication interface demand of different system.
The invention has the beneficial effects as follows:
The present invention is compared with prior art, manually or automatically mode can realize the range gear switch of different switching value input voltage grade under different switching value input type and active input condition, manually or automatically mode can realize active output and the switching of two kinds of output switch parameter types of passive output, solving prior art breaker in middle amount imput output circuit can not the problem of compatible different switching value input and output type and different switching value input voltage range, it is simple to user uses and organizes batch production.
Further, possess multiple communication modes and carry out information alternately with superior system, adapt to the different system demand to communication interface.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the present invention；
Fig. 2 is the structured flowchart of the On-off signal sense channel of the present invention；
Fig. 3 is the structured flowchart of the output switch parameter passage of the present invention；
Fig. 4 is the structured flowchart of the manual/auto configuration circuit of the present invention.
nullEach accompanying drawing is labeled as: 1 electric source filter circuit，2 switching value input circuits，21 On-off signal sense channels，3 switching value output circuits，31 output switch parameter passages，4 manual/auto configuration circuit，5 insulating power supplies，6 CPLD circuit，7 isolated form telecommunication circuits，71 RS485 drivers，72 isolated form CAN drivers，73 serial fiber optical transceivers，The double; two dynamic SPDT relay of K1，The double; two dynamic SPDT relay of K2，The double; two dynamic SPDT relay of K2，OP1 input signal detection optocoupler，D1 anti-paralleled diode，MR range arranges circuit，Rb1 optical coupling secondary edges pull-up resistor，Rb2 filter resistance，C1 filter capacitor，XL1 current-limiting circuit，K3 output relay，RXL1 current-limiting resistance array，RXL2 current-limiting resistance array，The manual SP3T switches set of SW3.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
With reference to shown in Fig. 1, the invention discloses a kind of general isolated form On-off signal output module, including electric source filter circuit 1, CPLD circuit 6 and the insulating power supply 5 being attached thereto, switching value input circuit 2, switching value output circuit 3, manual/auto configuration circuit 4 and isolated form telecommunication circuit 7.
Wherein:
Described electric source filter circuit 1 is for being filtered 18 36VDC DC power supplies of input, electric source filter circuit 1 and insulating power supply 5 are connected to it and provide input power, it is connected with switching value input circuit 2 and switching value output circuit 3, interface power POWER is provided for it, insulating power supply 5 outfan is connected to switching value input circuit 2, switching value output circuit 3, manual/auto configuration circuit 4, CPLD circuit 6 and isolated form telecommunication circuit 7, provide for it and control power supply VC.
Described switching value input circuit 2 is used for detecting On-off signal state, it is possible to manually or automatically mode realizes the range gear switch of different switching value input voltage grade under different switching value input type (active input and passive input) and active input condition.
Described switching value output circuit 3, for output switch parameter, manually or automatically mode can realize active output and the switching of two kinds of output switch parameter types of passive output.
Described manual/auto configuration circuit 4 is connected with switching value input circuit 2, switching value output circuit 3, CPLD circuit 6, for described switching value input circuit 2 being arranged manually or automatically according to On-off signal type and On-off signal voltage range, for arranging the output switch parameter type of described switching value output circuit 3 manually or automatically according to system requirements.
Described insulating power supply 5, for exporting 5VDC power supply after filtered DC power supply carries out DC-DC isolation, provides for described switching value input circuit 2, switching value output circuit 3, manual/auto configuration circuit 4, CPLD circuit 6 and isolated form telecommunication circuit 7 and controls power supply.
Described CPLD circuit 6 is for obtaining the switch input state information of described switching value input circuit 2 and being uploaded to Upper system by described isolated form telecommunication circuit 7, for obtaining the instruction of Upper system, control the output state of described manual/auto configuration circuit 4 and described switching value output circuit 3.
Described isolated form telecommunication circuit 7 provides three kinds of communication modes, mutual with the information of Upper system for realizing described CPLD circuit 6, can be communicated by RS485 or On-off signal status information is passed to superior system by the communication (optionally) such as CAN communication or serial optical fiber communication, and carry out the control of switching value input circuit and switching value output circuit from superior system acquisition instruction.
The present invention is not when changing any hardware circuit and external cabling, compatible different types of On-off signal signal and output switch parameter requirement, meet the On-off signal output characteristics of different system, it is to avoid design iterations and test, greatly improve the universal of module；Manually can configuring On-off signal and output type with automatic both of which, motility is good；It is easy to tissue batch production and debugging and safeguards, reducing integrated cost；Provide multiple communication interface, to adapt to the communication interface of different system.
Described switching value input circuit 2, switching value output circuit 3 are made up of one or more On-off signal sense channels 21 and output switch parameter passage 31 respectively.
Described switching value input circuit 2 is made up of multiple On-off signal sense channels 21 that function is identical.With reference to shown in Fig. 2, described On-off signal sense channel 21 comprises a double; two dynamic SPDT relay K 1, one input signal detection optocoupler OP1, one anti-paralleled diode D1, one range arranges circuit MR, one optical coupling secondary edges pull-up resistor Rb1, a filter resistance Rb2 and a filter capacitor C1；It is active type On-off signal or passive On-off signal that wherein said double; two dynamic SPDT relay K 1 is used for arranging On-off signal；Described range arranges circuit MR for arranging the equivalent series resistance of On-off signal sense channel 21, adapts to different active type On-off signal voltage range demands.
The contact s2 of described double, two dynamic SPDT relay K 1 is connected to the anode of external switch amount input, contact a1 and contact a2 short circuit, contact b1 is connected to filtered DC power supply anode, contact b2 is connected to described DC power supply negative terminal, contact s1 is connected to described range and arranges circuit MR and be connected to the negative terminal of external switch amount input after input signal detection optocoupler OP1, the line bag side of diode side and described double, two dynamic SPDT relay K 1 that described range arranges circuit MR is connected to described manual/auto configuration circuit 4, the outfan of input signal detection optocoupler OP1 is connected to described CPLD circuit 6 after Rb2 and filter capacitor C1 filters.
Further, when On-off signal type is active input, controls the line bag of described double; two dynamic SPDT relay K 1, make s1 be connected to a1, make s2 be connected to a2；When On-off signal type is passive input, controls the line bag of described double; two dynamic SPDT relay K 1, make s1 be connected to b1, make s2 be connected to b2.
Further, described range arranges circuit MR and comprises at least one alternate path, Article 1, alternate path is without series connection optocoupler, and the resistance of resistors in series should be greater than the resistor resistance of other paths connected in series, can in parallel in the quantity of path and path the resistance of resistors in series change minimum active voltage and the maximum permissible voltage of the active type On-off signal voltage of this circuit.
Further, described range arranges in circuit MR after the resistance of alternate path quantity and each alternate path resistors in series is determined, by controlling being switched on or off of optocoupler in each path, change equivalent series resistance, adapt to the demand of On-off signal signal voltage range section.
Described switching value output circuit 3 is made up of multiple output switch parameter passages 31 that function is identical, as shown in Figure 3, described output switch parameter passage 31 comprises a double; two dynamic SPDT relay K 2, one for the current-limiting circuit XL1 preventing power supply from crossing a stream and output relay K3, described double; two dynamic SPDT relay K 2, being used for arranging output switch parameter is active type output switch parameter or passive output switch parameter.
Further, the contact a1 of the double; two dynamic SPDT relay K 2 stated is unsettled, the negative terminal of output switch parameter it is connected to after contact b1 and contact a2 short circuit, filtered DC power supply anode is connected with contact b2 after current-limiting circuit XL1, contact s1 is connected to DC power supply negative terminal, contact s2 is connected to the anode of output switch parameter after relay, and the line bag side of described double; two dynamic SPDT relay K 2 is connected to described manual/auto configuration circuit 4, and the control end of described relay K 3 is connected to described CPLD circuit 6.
Further, when output switch parameter type is passive output, controls the line bag of described double; two dynamic SPDT relay K 2, make s1 be connected to a1, make s2 be connected to a2；When output switch parameter type is active output, controls the line bag of described double; two dynamic SPDT relay K 2, make s1 be connected to b1, make s2 be connected to b2.
As shown in Figure 4, described manual/auto configuration circuit 4 includes current-limiting resistance array RXL1, exports the electric current of control signal for limiting described manual/auto configuration circuit 4；Current-limiting resistance array RXL2, is switched to the output electric current of described CPLD circuit 6 during manual configuration pattern for limiting described manual SP3T switches set SW3, it is prevented that described CPLD circuit 6 is damaged；Manual SP3T switches set SW3, it is made up of multiple manual SP3Ts switch, SP3T switch tap terminals be allocated to contact 1. or contact 3. time, manual configuration for switch amount input type, output switch parameter type and On-off signal range, described SP3T switch tap terminals be allocated to contact 2. time, switching to the pattern of automatically configuring, described SP3T switch is bypassed, CPLD circuit 6 automatically configure switching value input circuit 2 and switching value output circuit 3.
Further, described isolated form telecommunication circuit 7 includes isolated form RS485 driver 71, isolated form CAN driver 72 and serial fiber optical transceiver 73, supports RS485 communication, CAN communication and serial optical fiber communication, to adapt to the communication interface demand of different system.
The setting of each running parameter of the present invention should follow following principle:
(1) it should be understood that the active type On-off signal minimum active voltage VINmin and maximum permissible voltage VINmax of this module support, following each embodiment sets VINmin=5VDC, VINmax=60VDC；
(2) clear and definite On-off signal detection optocoupler (in Fig. 2 OP1) IF effective range (IFmin IFmax) and optocoupler in diode forward conduction voltage drop VF, following each enforcement sets IFmin=2mA, IFmax=20mA, VF=1.2V；
(3) according to the parameter of (1) and (2), it is determined that range arranges circuit MR(Fig. 2) alternate path number n, need to meet owing to range arranges the equivalent resistance Re of circuit MR
R1 >=(VINmax-VF)/IFmax=(60V-1.2V)/20mA=2.94k Ω) and Re≤(VINmin-VF)/IFmin=(5V-1.2V)/2mA=1.94k Ω)
Obvious n is naturally larger than equal to 2, and following each embodiment takes n=2；
(4) result according to (3), calculate range and the resistance of each parallel branch in circuit MR is set, in following each embodiment, as n=2, R0>2.94k Ω (calculating process is shown in (3)) and (VINmin-VF)/(R1//R2)>IFmin need to be met, calculate R2<1.017k Ω, take R1=3k Ω, R2=1k Ω；
(5) reversely verify, the On-off signal voltage maximum magnitude of this circuit support known is 4.2VDC 61.2VDC, in Fig. 2 during the conducting of U2 outlet side, On-off signal detection effective range is 4.2VDC 17.2VDC, when U2 outlet side turns off, On-off signal detection effective range is 10.2VDC 61.2VDC.
Embodiment 1
nullWhen On-off signal type is passive，Under pattern is set automatically，2. SWb1 in Fig. 4 is allocated to contact，Superior system passes through isolated form telecommunication circuit 7(Fig. 1) to notify that CPLD circuit 6 exports DI_SW1 be low level，If in a manual mode，Directly 3. SWb1 in Fig. 4 is allocated to contact，Now in Fig. 2, in double; two dynamic SPDT relay K 1, s1 is connected to b1，S2 is connected to b2，When the passive switch amount of externally input closes，In Fig. 2 measure loop electric current from power supply POWER successively through the s1 contact of K1、Range arranges circuit MR、Detection optocoupler OP1、The passive input switch amount of Guan Bi、S2 contact and the b2 contact of K1 flow back into POWER_GND，The secondary triode ON of detection optocoupler OP1，To CPLD circuit 6 output low level，Otherwise，When the passive switch amount of externally input disconnects，Aforementioned measure loop no current，The secondary audion cut-off of OP1，High level is exported to CPLD circuit 6，This On-off signal status information is reached described superior system by isolated form telecommunication circuit 7 by CPLD circuit 6 again.
Embodiment 2 is a further embodiment.
With above-described embodiment 1 the difference is that, On-off signal type is active type.nullWhen On-off signal type is active type，Under pattern is set automatically，2. SWb1 in Fig. 4 is allocated to contact，Superior system passes through isolated form telecommunication circuit 7(Fig. 1) to notify that CPLD circuit 6 exports DI_SW1 be high level，If in a manual mode，Directly 1. SWb1 in Fig. 4 is allocated to contact，Now in Fig. 2, in double; two dynamic SPDT relay K 1, s1 is connected to a1，S2 is connected to a2，When external active inputs the operation voltage of signal less than aforementioned result of calculation 10.2V，By automatic or manual mode，Making DI_MR2 in Fig. 2 is high level，Range configures R2 parallel branch in circuit MR put into，Now，When the active switch amount voltage of externally input is more than aforementioned value of calculation 4.2V，The electric current of measure loop from external switch amount input source anode successively through the s2 of K1、The a2 of K1、The s1 of K1、The diode of range configuration circuit MR and detection optocoupler OP1 flow back into On-off signal source negative terminal，Now detection optocoupler OP1 secondary triode ON，To CPLD circuit 6 output low level，Otherwise，When external switch amount input source Non voltage output，Aforementioned measure loop no current，The secondary audion cut-off of OP1，High level is exported to CPLD circuit 6，Aforementioned measure loop no current，The secondary audion cut-off of OP1，High level is exported to CPLD circuit 6，This On-off signal status information is reached described superior system by isolated form telecommunication circuit (7) by CPLD circuit 6 again.
Embodiment 3
When the switch output type of this On-off signal output module of system requirements is passive, under pattern is set automatically, 2. SWc1 in Fig. 4 is allocated to contact, superior system passes through isolated form telecommunication circuit 7(Fig. 1) to notify that CPLD circuit 6 exports DO_SW1 be high level, if in a manual mode, directly 1. SWc1 in Fig. 4 is allocated to contact, now in Fig. 3, in double, two dynamic SPDT relay K 2, s1 is connected to a1, s2 is connected to a2, the two ends, contact being equivalent to relay K 3 are directly connected to external output port, externally present passive switching value characteristic, superior system can control its state through isolated form telecommunication circuit 7 and CPLD circuit 6.
Embodiment 4 is a further embodiment.
With above-described embodiment 3 the difference is that, output switch parameter type is active type.When the switch output type of this On-off signal output module of system requirements is active type, under pattern is set automatically, 2. SWc1 in Fig. 4 is allocated to contact, superior system passes through isolated form telecommunication circuit 7(Fig. 1) to notify that CPLD circuit 6 exports DO_SW1 be low level, if in a manual mode, directly 3. SWc1 in Fig. 4 is allocated to contact, now in Fig. 3, in double, two dynamic SPDT relay K 2, s1 is connected to b1, s2 is connected to b2, power supply POWER exports to outside port after current-limiting circuit is connected with relay K 3 again, externally present active type switching value characteristic, whether externally superior system can control this circuit out-put supply through isolated form telecommunication circuit 7 and CPLD circuit 6.
Above-described embodiment is illustrative principles of the invention and effect thereof only; and the embodiment that part is used, for the person of ordinary skill of the art, without departing from the concept of the premise of the invention; can also making some deformation and improvement, these broadly fall into protection scope of the present invention.
Claims (11)
1. isolated form On-off signal output module one kind general, it is characterised in that: include
Electric source filter circuit (1), for 18 36VDC DC power supplies of input are filtered, provides high quality power supply for described switching value input circuit (2), switching value output circuit (3) and insulating power supply (5)；
Switching value input circuit (2), is used for detecting On-off signal state；
Switching value output circuit (3), for output switch parameter；
Manual/auto configuration circuit (4), for described switching value input circuit (2) being arranged manually or automatically according to On-off signal type and On-off signal voltage range, for arranging the output switch parameter type of described switching value output circuit (3) manually or automatically according to system requirements；
Insulating power supply (5), for exporting 5VDC power supply after filtered DC power supply is carried out DC-DC isolation, provide for described switching value input circuit (2), switching value output circuit (3), manual/auto configuration circuit (4), CPLD circuit (6) and isolated form telecommunication circuit (7) and control power supply；
CPLD circuit (6), for obtaining the switch input state information of described switching value input circuit (2) and being uploaded to Upper system by described isolated form telecommunication circuit (7), for obtaining the instruction of Upper system, control described manual/auto configuration circuit (4) and the output state of described switching value output circuit (3)；
Isolated form telecommunication circuit (7), is used for realizing described CPLD circuit (6) mutual with the information of Upper system.
2. a kind of general isolated form On-off signal output module according to claim 1, it is characterized in that, described switching value input circuit (2) is made up of multiple On-off signal sense channels (21) that function is identical, described On-off signal sense channel (21) comprises a double; two dynamic SPDT relay K 1, one input signal detection optocoupler OP1, one anti-paralleled diode D1, one range arranges circuit MR, one optical coupling secondary edges pull-up resistor Rb1, a filter resistance Rb2 and a filter capacitor C1；Wherein:
It is active type On-off signal or passive On-off signal that described double; two dynamic SPDT relay K 1 is used for arranging On-off signal；Described range arranges circuit MR for arranging the equivalent series resistance of On-off signal sense channel (21), adapts to different active type On-off signal voltage range demands.
3. a kind of general isolated form On-off signal output module according to claim 2, it is characterized in that, the contact s2 of described double, two dynamic SPDT relay K 1 is connected to the anode of external switch amount input, contact a1 and contact a2 short circuit, contact b1 is connected to filtered DC power supply anode, contact b2 is connected to described DC power supply negative terminal, contact s1 is connected to described range and arranges circuit MR and be connected to the negative terminal of external switch amount input after input signal detection optocoupler OP1, the line bag side of diode side and described double, two dynamic SPDT relay K 1 that described range arranges circuit MR is connected to described manual/auto configuration circuit (4), the outfan of input signal detection optocoupler OP1 is connected to described CPLD circuit (6) after Rb2 and filter capacitor C1 filters.
4. a kind of general isolated form On-off signal output module according to claim 2, it is characterised in that when On-off signal type is active input, controls the line bag of described double; two dynamic SPDT relay K 1, makes s1 be connected to a1, make s2 be connected to a2；When On-off signal type is passive input, controls the line bag of described double; two dynamic SPDT relay K 1, make s1 be connected to b1, make s2 be connected to b2.
5. a kind of general isolated form On-off signal output module according to claim 2, it is characterized in that, described range arranges circuit MR and comprises at least one alternate path, Article 1, alternate path is without series connection optocoupler, and the resistance of resistors in series should be greater than the resistor resistance of other paths connected in series, can in parallel in the quantity of path and path the resistance of resistors in series change minimum active voltage and the maximum permissible voltage of the active type On-off signal voltage of this circuit.
6. a kind of general isolated form On-off signal output module according to claim 2, it is characterized in that, described range arranges in circuit MR after the resistance of alternate path quantity and each alternate path resistors in series is determined, by controlling being switched on or off of optocoupler in each path, change equivalent series resistance, adapt to the demand of On-off signal signal voltage range section.
7. a kind of general isolated form On-off signal output module according to claim 1, it is characterized in that, described switching value output circuit (3), the multiple output switch parameter passages (31) identical by function form, described output switch parameter passage (31) comprises a double; two dynamic SPDT relay K 2, one for the current-limiting circuit XL1 preventing power supply from crossing a stream and output relay K3, described double; two dynamic SPDT relay K 2, being used for arranging output switch parameter is active type output switch parameter or passive output switch parameter.
8. a kind of general isolated form On-off signal output module according to claim 7, it is characterized in that, the contact a1 of described double, two dynamic SPDT relay K 2 is unsettled, the negative terminal of output switch parameter it is connected to after contact b1 and contact a2 short circuit, filtered DC power supply anode is connected with contact b2 after current-limiting circuit XL1, contact s1 is connected to DC power supply negative terminal, contact s2 is connected to the anode of output switch parameter after relay, the line bag side of described double, two dynamic SPDT relay K 2 is connected to described manual/auto configuration circuit (4), the control end of described relay K 3 is connected to described CPLD circuit (6).
9. a kind of general isolated form On-off signal output module according to claim 7, it is characterised in that when output switch parameter type is passive output, controls the line bag of described double; two dynamic SPDT relay K 2, makes s1 be connected to a1, make s2 be connected to a2；When output switch parameter type is active output, controls the line bag of described double; two dynamic SPDT relay K 2, make s1 be connected to b1, make s2 be connected to b2.
10. a kind of general isolated form On-off signal output module according to claim 1, it is characterised in that described manual/auto configuration circuit (4), including:
Current-limiting resistance array RXL1, is used for limiting the electric current of described manual/auto configuration circuit (4) output control signal；
Current-limiting resistance array RXL2, is used for limiting described manual SP3T switches set SW3 and is switched to the output electric current of described CPLD circuit (6) during manual configuration pattern, it is prevented that described CPLD circuit (6) is damaged；
Manual SP3T switches set SW3, it is made up of multiple manual SP3Ts switch, SP3T switch tap terminals be allocated to contact 1. or contact 3. time, manual configuration for switch amount input type, output switch parameter type and On-off signal range, described SP3T switch tap terminals be allocated to contact 2. time, switch to the pattern of automatically configuring.
11. a kind of general isolated form On-off signal output module according to claim 1, it is characterized in that, described isolated form telecommunication circuit (7) includes isolated form RS485 driver (71), isolated form CAN driver (72) and serial fiber optical transceiver (73), support RS485 communication, CAN communication and serial optical fiber communication, to adapt to the communication interface demand of different system.
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