CN203574632U - Control signal isolation protection terminal block - Google Patents
Control signal isolation protection terminal block Download PDFInfo
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- CN203574632U CN203574632U CN201320683069.XU CN201320683069U CN203574632U CN 203574632 U CN203574632 U CN 203574632U CN 201320683069 U CN201320683069 U CN 201320683069U CN 203574632 U CN203574632 U CN 203574632U
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Abstract
The utility model provides a control signal isolation protection terminal block which aims to solve the problems that in the prior art, electrical control devices such as a PLC in an industrial electric control system are directly connected with a load, when the load occurs emergency cases such as short circuit and overcurrent, the electrical control devices such as the PLC can be easily burned out by alternating current. The control signal isolation protection terminal block comprises an optoelectronic isolator, a control signal power supply, and a terminal block power supply, the control signal isolation protection terminal block can isolate the electrical control signal emitted by a PLC from a load and cuts off the direct electrical connection between the electrical control signal and the load, and particularly, an input signal and an output signal adopt two independent power supplies, so that the phenomenon that high voltage at the load side is added to the electrical control devices to result in the burnout of the electrical control devices can be prevented.
Description
Technical field
The utility model designs a kind of control signal insulation blocking terminal board.
Background technology
At present, in industrial control system, the electric control system take PLC control as core is widely used, the stable instructions for use with reliably meeting most of occasion of PLC.The control signal that PLC sends is often directly connected with relay, servo, frequency conversion even load, once emergency case such as load generation overcurrent, short circuits, it is upper that the alternating current of load-side is easy to be added to PLC, causes burning PLC, whole system cannot normally be worked, and causes larger loss.
Utility model content
The purpose of this utility model is; in prior art; in industrial electric control system, the electrical control equipment such as PLC is directly connected with load; when the emergency case such as load is short-circuited, overcurrent; the deficiency that easily causes alternating current to burn the electrical control equipments such as PLC, the control signal insulation blocking terminal board that provides a kind of electrical control signal that PLC can be sent and load isolation to open.
The purpose of this utility model is to carry out by the following technical programs specific implementation:
A kind of control signal insulation blocking terminal board, by photoelectric isolating circuit, control signal power supply and terminal board power supply composition, described photoelectric isolating circuit is by current-limiting resistance one, optocoupler, protective tube, current-limiting resistance two, signal lamp composition, described current-limiting resistance one is connected with the positive pole of the diode of described optocoupler, described protective tube is connected with the collector electrode of the phototriode of described optocoupler, the emitter of described current-limiting resistance two and signal lamp and described phototriode is connected in series, by the negative pole of described diode, connected the ground of described control signal power supply, by described current-limiting resistance one, connected the positive pole of described control signal power supply, by described protective tube, connected the positive pole of described terminal board power supply, described signal lamp connects described terminal board power supply negative pole, the transmitting of the phototriode of optocoupler is optocoupler signal output part very,
Described control signal insulation blocking terminal board is comprised of the photoelectric isolating circuit described in two-way at least, the current-limiting resistance one of You Mei road photoelectric isolating circuit is connected with the positive pole of described control signal power supply, the negative pole of the diode of You Mei road photoelectric isolating circuit connects the negative pole of described control signal power supply, the protective tube of You Mei road photoelectric isolating circuit connects the positive pole of described terminal board power supply, and the signal lamp of the photoelectric isolating circuit on You Mei road connects described terminal board power supply negative pole;
Described signal lamp is light-emitting diode.
This terminal board comes control signal and load isolation by photoelectric isolating circuit, cut off the direct electrical communication between control signal and load, especially input signal and output signal have adopted two independently power supplys, thereby can avoid the high pressure of load-side to be added to the situation that causes burning apparatus on electrical control equipment.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of the utility model control signal insulation blocking terminal board;
Fig. 2 is the control signal insulation blocking terminal board example structure figure of the utility model You Yi road photoelectric isolating circuit composition;
Fig. 3 is the control signal insulation blocking terminal board example structure figure that the utility model is comprised of multi-path light electric isolating circuit;
Description of reference numerals
The ground 12-optocoupler 13-protective tube 14-optocoupler signal output part 15-current-limiting resistance two 16-signal lamps of the anodal 10-current-limiting resistance one 11-control signal power supply of the anodal 8-terminal board of 1-signal input module 2-signal isolation module 3-signal output module 4-control signal 5-output signal 6-terminal board power supply 7-terminal board power supply power supply negative pole 9-control signal power supply
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is conducted further description:
As illustrated in fig. 1 and 2; this control signal insulation blocking terminal board; by signal input module 1, signal isolation module 2 and signal output module 3, formed; signal input module 1 is comprised of current-limiting resistance 1 and control signal power supply; signal isolation module 2 is comprised of optocoupler 12 and terminal board power supply 6, and signal output module 3 is comprised of protective tube 13, current-limiting resistance 2 15.The ground 11 of control signal power supply namely sends the ground of the electric equipment of control signal, the ground of control signal 4 connects the ground 11 of control signal power supply, current-limiting resistance 1 is connected to the positive interpolar of the positive pole 9 of control signal power supply and the diode of optocoupler 12, and the negative pole of the diode of optocoupler connects the ground 11 of control signal power supply, collector electrode by the phototriode of optocoupler connects protective tube 13, by protective tube 13, be connected with terminal board power supply positive pole 7, the emitter of the phototriode of optocoupler and current-limiting resistance 2 15, signal lamp 16 is connected afterwards and terminal board power supply negative pole 8 joins, preferably light-emitting diode is as signal lamp 16, when light-emitting diode is during as signal lamp 16, the negative pole of light-emitting diode and terminal board power supply negative pole 8 join, its anodal current-limiting resistance 2 15 that connects, the supply voltage of control signal 4 and terminal board power supply voltage homophase, and size is identical.
During work, control signal 4 inputs to current-limiting resistance 1 from the port of signal input module 1, enter into the input of optocoupler 12, control signal 14 converts light signal to through the diode of optocoupler 12 inputs, the base stage of the phototriode of optocoupler output receives saturation conduction after light signal, voltage during due to phototriode saturation conduction between collector and emitter approaches zero, and then realized by with the voltage homophase of control signal, with big or small Voltage-output to load, make the control signal amplitude of output signal and input basic identical, phase place is identical, amplitude error is in 0.5V.
As shown in Figure 3, in order to coordinate the multichannel of the electric equipments such as PLC integrated, preferred signals input module 1 forms by multichannel current-limiting resistance 1 is integrated, signal isolation module 2 forms by multichannel optocoupler 12 is integrated, signal output module 3 is by multichannel protective tube 13, signal lamp 16, the integrated composition of current-limiting resistance 2 15, the input of every road optocoupler 12 connects a road current-limiting resistance 1, the collector electrode of the phototriode of every road optocoupler output connects a protective tube 13, the positive pole 7 of protective tube 13 and terminal board power supply is connected, emitter connects a current-limiting resistance 2 15, current-limiting resistance 2 15 and signal lamp 16 are connected, every road control signal is provided by the electric equipment that sends control signal, the ground sending and receiving of every road control signal power supply go out the ground of the electric equipment of control signal, every road control signal power supply is identical with terminal board power supply homophase and size.
In the utility model; for preventing load current overload or short circuit; between the collector electrode Yu Mei road terminal board power supply of the phototriode of Mei road optocoupler 12 outputs, be connected in series protective tube 13, according to the size of current of definite overload protection, select the protective tube 13 of mutually suitable specification.Generally, choose the electric current of the protective tube that is connected on optocoupler collector electrode a little less than the maximum permissible current of optocoupler.If the maximum permissible current of optocoupler is 120mA; choosing the protective tube specification that is connected on optocoupler collector electrode is 100mA; when load current exceedes 100mA due to situations such as short circuit or overloads; blown fuse; indicator light extinguishes; only need to again change protective tube can normally work, and has protected optocoupler and the electric equipment PLC that sends control signal.
For the ease of observing, in signal output module, be provided with signal lamp 16, the emitter of the phototriode of optocoupler output is connected with current-limiting resistance, and current-limiting resistance is connected with indicator light, and current-limiting resistance has guaranteed that the brightness of indicator light is suitable, and power consumption is less.
The control signal 4 that the electrical control equipments such as PLC send is entered by 1 port of signal input module, through one 10 pairs of signals of current-limiting resistance, regulate, by the diode of optocoupler input, convert the signal of telecommunication of input to light signal again, the phototriode of optocoupler output receives saturation conduction after light signal, again light signal is converted to the signal of telecommunication and exports to load, completed the isolation on electricity of control signal and output signal.
Because signal input module is comprised of current-limiting resistance, control signal enters into optocoupler after current-limiting resistance regulates, when flowing through the electric current difference of diode of optocoupler input, the frequency response of optocoupler is also different, especially when control signal is high-frequency signal, the signal waveform that inappropriate electric current causes output is not steadily or postpone output, affect the control action of signal, the exemplary operation electric current that it is optocoupler that current-limiting resistance can make by the electric current of optocoupler input, now the high-frequency signal waveform of output is good, substantially consistent with input waveform, response fast, do not postpone, reached the control effect of original control signal.The ground of control signal power supply is the ground that sends the electric equipment of control signal, when having control signal input, by signal isolation module 2, isolated and converted to light signal, light signal converts the signal of telecommunication to again and outputs to signal output module 3, via optocoupler signal output part 14, exports to load.Because the ground of terminal board power supply 6 of powering to signal isolation module 2 and signal output module 3 and the ground of control signal power supply divide, be arranged, so guaranteed that control signal and output signal isolate completely, the alternating current of load-side can not be added on PLC.Moreover, by output signal, be connected with the emitter of phototriode, so output signal and input signal are homophases; Current-limiting resistance and light-emitting diode are arranged between the ground of emitter and out-put supply, so can not cause dividing potential drop and shunting to output signal, the voltage stabilization of output signal is reliable.
Below in conjunction with specific embodiment, the course of work of this terminal board is further described:
Take 8 road terminal boards as example, the control signal of supposing the first via port reception of signal input module is 24V, the control signal that the second road port of signal input module receives is low level, when first via port has the input of 24V control signal, control signal is by one 10 pairs of optocoupler input current limlitings of current-limiting resistance, make the wave mode of optocoupler output steady, smooth, assurance optocoupler is worked under best state, 24V signal is passed to first via optocoupler 12 via current-limiting resistance 1, the diode of optocoupler input converts the electrical signal to light signal, the phototriode of optocoupler output receives saturation conduction after light signal, now the voltage between the collector and emitter of phototriode approaches zero, so by the 24V Voltage-output of terminal board DC power supply 6 to load, realized the conversion of light signal to the signal of telecommunication, first via signal lamp 16 luminous indications simultaneously have the output of 24V signal, because the ground of terminal board DC power supply and the ground 11 of electric equipment such as PLC that sends control signal are two different ground, optocoupler 12 converts the signal of telecommunication of the electric equipment that control signal is provided to light signal, this light signal has converted the Voltage-output identical with the voltage of the control signal providing to load by phototriode with the DC power supply being connected on phototriode, so realized load and the isolation of electric device that control signal is provided, having avoided the alternating current of load-side to be added to PLC etc. provides on the device of control signal, make alternating voltage in load and PLC etc. provide the device of control signal to isolate completely.What receive due to the second road port of input module is the low level voltage that control appliance provides, the input of the second road optocoupler of signal isolation module does not have driving voltage, the triode that is connected to optocoupler output cannot conducting, signal output module output low level signal, the Level hold of the control signal receiving with signal input module is consistent.So in identical current potential, but there is no contacting directly of electricity between load and PLC, so avoided the alternating current of load-side to join on PLC.The operation principle on other 6 tunnel is the same.
The control signal insulation blocking terminal board that adopts the utility model structure, is connected to form by signal input module, signal isolation module and signal output module, by signal input module, the signal of input is identified, and is provided best operating current to optocoupler; By signal isolation module, control signal and output signal are carried out to electric isolation; By signal output module, carried out indication and the overcurrent protection of signal output, whole terminal board has played reliable insulation blocking effect to sending the electric equipment of control signal.
Find out thus; the no matter height of the level of control signal, this terminal board all can provide identical with its direction, equal-sized voltage, but the voltage of load-side can not be loaded into signal input module end; so realized the isolation that PLC and load alternating current are pressed, effectively protected the electric control gears such as PLC.
The voltage of power supply and the voltage of control signal are consistent, and can realize output signal identical with control signal voltage swing.Have signal output time to have indicator light to indicate, current-limiting resistance makes the brightness of indicator light meet the comfort level of human eye, makes the power consumption minimum of indicator light simultaneously, when the rated value of load current over insurance pipe, blown fuse, indicator light is gone out by bright change, and prompting user changes.
Claims (3)
1. a control signal insulation blocking terminal board, it is characterized in that, by photoelectric isolating circuit, control signal power supply and terminal board power supply composition, described photoelectric isolating circuit is by current-limiting resistance one (10), optocoupler (12), protective tube (13), current-limiting resistance two (15), signal lamp (16) composition, described current-limiting resistance one (10) is connected with the positive pole of the diode of described optocoupler, described protective tube (13) is connected with the collector electrode of the phototriode of described optocoupler, described current-limiting resistance two (15) and signal lamp (16) are connected in series with the emitter of described phototriode, by the negative pole of described diode, connected the ground (11) of described control signal power supply, by described current-limiting resistance one, connected the positive pole (9) of described control signal power supply, by described protective tube, connected the positive pole (7) of described terminal board power supply, described signal lamp (16) connects described terminal board power supply negative pole (8), the transmitting of the phototriode of optocoupler is optocoupler signal output part (14) very.
2. control signal insulation blocking terminal board as claimed in claim 1, it is characterized in that, described control signal insulation blocking terminal board is comprised of the photoelectric isolating circuit described in two-way at least, the current-limiting resistance one of You Mei road photoelectric isolating circuit is connected with the positive pole of described control signal power supply, the negative pole of the diode of You Mei road photoelectric isolating circuit connects the negative pole of described control signal power supply, the protective tube of You Mei road photoelectric isolating circuit connects the positive pole (7) of described terminal board power supply, the signal lamp (16) of the photoelectric isolating circuit on You Mei road connects described terminal board power supply negative pole (8).
3. control signal insulation blocking terminal board as claimed in claim 1 or 2, is characterized in that, described signal lamp (16) is light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320683069.XU CN203574632U (en) | 2013-10-24 | 2013-10-24 | Control signal isolation protection terminal block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320683069.XU CN203574632U (en) | 2013-10-24 | 2013-10-24 | Control signal isolation protection terminal block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203574632U true CN203574632U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320683069.XU Expired - Fee Related CN203574632U (en) | 2013-10-24 | 2013-10-24 | Control signal isolation protection terminal block |
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| Country | Link |
|---|---|
| CN (1) | CN203574632U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109665078A (en) * | 2019-02-11 | 2019-04-23 | 深圳鳍源科技有限公司 | Remote-controlled vehicle |
| CN116500429A (en) * | 2023-03-16 | 2023-07-28 | 深圳市志奋领科技有限公司 | Proximity switch surge testing device and method |
-
2013
- 2013-10-24 CN CN201320683069.XU patent/CN203574632U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109665078A (en) * | 2019-02-11 | 2019-04-23 | 深圳鳍源科技有限公司 | Remote-controlled vehicle |
| CN109665078B (en) * | 2019-02-11 | 2024-05-24 | 深圳鳍源科技有限公司 | Remote-controlled submersible |
| CN116500429A (en) * | 2023-03-16 | 2023-07-28 | 深圳市志奋领科技有限公司 | Proximity switch surge testing device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20171024 |