CN202033641U - PLC (Programmable Logic Controller) module port protector - Google Patents
PLC (Programmable Logic Controller) module port protector Download PDFInfo
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- CN202033641U CN202033641U CN2011201232173U CN201120123217U CN202033641U CN 202033641 U CN202033641 U CN 202033641U CN 2011201232173 U CN2011201232173 U CN 2011201232173U CN 201120123217 U CN201120123217 U CN 201120123217U CN 202033641 U CN202033641 U CN 202033641U
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Abstract
The utility model relates to a protector, and discloses a PLC (Programmable Logic Controller) module port protector which comprises a binding post row, an overvoltage and overcurrent detection module, an overvoltage protection module, an overcurrent protection module and a fault line indicator light module, wherein the binding post row at an input end is connected with an external signal binding post, the binding post row at an output end is connected with a PLC input and output port terminal; and the binding post row at the input end is connected in series with the overvoltage and overcurrent detection module, the overvoltage protection module, the overcurrent protection module and the binding post row at the output end in sequence, and control signals of the overvoltage and overcurrent detection module and the overcurrent protection module are connected into the fault line indicator light module. The protector can be directly connected into a PLC module port line, can restrict influence on the PLC module so as to realize fast cut-off in fault, display which line has fault and is cut off, and prevent the industrial production stop due to damage of the PLC module when overvoltage and overcurrent occur in the line.
Description
Technical field
The utility model relates to a kind of protective device, is particularly useful for the input/output port of PLC module is protected.
Background technology
The PLC(programmable logic controller (PLC)) be the nucleus equipment of Industry Control, its stable operation is very important to ordinary production.In industry spot, because PLC working environment and condition are all complicated, through regular meeting superpotential appears or excess current enters input and output (I/O) port of PLC module, as circuit connection error, signal line exists ground connection or short circuit, electrical equipment meets with situations such as thunderbolt, all can produce higher voltage or electric current in the I/O of PLC module interface circuit; And the working power of PLC module is direct current 24V voltage substantially; though the PLC inside modules has all designed holding circuit; but often can't bear the impact of these superpotential or excess current; cause the damage of module; not only need to change module, increase cost, and need spended time to search and confirm the trouble spot; cause producing and interrupt, what influence was produced normally carries out.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of PLC module port protective device; it has can directly insert in the PLC module port circuit; when occurring superpotential, excess current in the circuit; suppress its influence to the PLC module; fast shut-off when realization is broken down; and demonstrate concrete any bar circuit and break down or cut off, the characteristics that the commercial production that prevents to cause because of the PLC module damage is interrupted.
For solving the problems of the technologies described above, the utility model provides and has comprised connecting terminal block, superpotential excess current detection module, over-voltage protection module, overcurrent protection module, faulty line indicating lamp module,
Described connecting terminal block is at least a pair of, and each is to comprising input end connecting terminal block and output terminal connecting terminal block, and described input end connecting terminal block connects external signal line scan pickup coil side, and described output terminal connecting terminal block connects PLC input/output port terminal;
Described faulty line indicating lamp module comprises faulty line pilot lamp and faulty line pilot lamp driver circuit;
The input end connecting terminal block is connected successively with described superpotential excess current detection module, over-voltage protection module, overcurrent protection module, output terminal connecting terminal block, and the control signal of superpotential excess current detection module, the control signal of overcurrent protection module insert the faulty line pilot lamp driver circuit of indicating fault lamp module;
Superpotential excess current detection module, over-voltage protection module, overcurrent protection module, faulty line indicating lamp module have many identical individual passage; faulty line pilot lamp in the corresponding faulty line indicating lamp module of each bar passage, each passage all is connected with external signal by connecting terminal block.
The optimal technical scheme that technique scheme is carried out is, described superpotential excess current detection module comprises overcurrent sensing circuit and overvoltage detection circuit,
Described overcurrent sensing circuit is connected serially in the signal line, and described overvoltage detection circuit is connected in parallel between signal line and the ground.
To technique scheme further preferably, described over-voltage protection module comprises that surge voltage suppresses circuit with reverse blocking circuit, voltage dependent resistor (VDR) excess voltage suppressor and direct current RC superpotential,
Described voltage dependent resistor (VDR) excess voltage suppressor suppresses circuit with described direct current RC superpotential connects, and described surge voltage is connected in parallel between signal circuit and the ground with the reverse blocking circuit.
To technique scheme more further preferably, described overcurrent protection module comprises fastp-acting fuse, direct current quick breaker, overcurrent relay,
Described fastp-acting fuse, direct current quick breaker, overcurrent relay are connected in the signal circuit, and wherein the main coil of overcurrent relay is connected in the signal line, and its node connects the faulty line pilot lamp driver circuit of described faulty line indicating lamp module.
The technical scheme that is more preferably is that the faulty line pilot lamp in the described faulty line indicating lamp module is a light emitting diode, described faulty line pilot lamp driver circuit led drive circuit.
Advantage of the present utility model is:
1. the utility model includes many protection passages, can realize simultaneously a plurality of PLC module ports are protected, and by can realize the I/O port protection to the PLC module of various criterion and specification to its adjustment of installing interior element protection parameter.
PLC module port protective device disclosed in the utility model; can directly insert in the PLC module port circuit; when occurring superpotential, excess current in the circuit; suppress its influence to the PLC module; fast shut-off when realization is broken down; and demonstrate concrete which bar circuit and break down or cut off, prevent that the commercial production that causes because of the PLC module damage from interrupting.Can find fast and the localization of faults, reduce because of changing the PLC module and producing the loss that stops to bring.
Description of drawings
Fig. 1 is the connection status synoptic diagram of the utility model embodiment.
Fig. 2 is the structural representation of the utility model embodiment.
Wherein, 1-PLC module, 2-the utility model, 3-output terminal connecting terminal block, 4-faulty line pilot lamp, 5-input end connecting terminal block, the outside line connection terminal of 6-PLC module.
Embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined utility model purpose is taked; below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and effect thereof according to the PLC module port protective device that the utility model proposes are elaborated.
The structural representation of the utility model embodiment as shown in Figure 2; the utility model comprises many route protection passages, and wherein arbitrary protection passage comprised connecting terminal block, voltage excess current detection module, over-voltage protection module, overcurrent protection module, faulty line indicating lamp module.All series connection between input end connecting terminal block, superpotential excess current detection module, over-voltage protection module, overcurrent protection module, the output terminal connecting terminal block; superpotential excess current detection module wherein; the overcurrent protection module has control signal to enter the indicating fault lamp module, controls its demonstration.Connection terminal quantity is one or more; be mainly used in the connection of circuit; can connect the I/O circuit of a plurality of PLC modules and protect; every corresponding malfunction indicator lamp 4 of protection circuit; preferably; adopt LED (Light Emitting Diode, light emitting diode) as malfunction indicator lamp.
Wherein, connecting terminal block comprises: input end connecting terminal block 5, output terminal connecting terminal block 3.Output terminal connecting terminal block 3 is used for connecting the input/output port terminal of PLC module 1, and input end connecting terminal block 5 connects external signal line scan pickup coil side 6.Superpotential and excess current that superpotential excess current detection module is responsible for occurring in the testing circuit, and control fault line signal module shows which bar circuit breaks down.Over-voltage protection module is mainly used in the superpotential that inhibition produces because of external cause, inserts the PLC module port as cause the 220V AC power because of wiring error, or the superpotential of thunderbolt generation etc.The overcurrent protection module is mainly used in ground connection or short circuit generation appear in inhibition because of PLC module 1 port line excess current.The faulty line indicating lamp module is mainly used in fault or the dissengaged positions that shows its corresponding line.
In the present embodiment, the faulty line indicating lamp module comprises: led drive circuit and LED display lamp 4.
Superpotential excess current detection module comprises: adopt the current detection circuit of resistance method of temperature measurement and the overvoltage detection circuit of being made up of integrated operational amplifier.Current detection circuit is connected serially in the signal line, and overvoltage detection circuit is connected in parallel between signal line and the ground.
Over-voltage protection module comprises: surge voltage suppresses circuit with reverse blocking circuit, voltage dependent resistor (VDR) excess voltage suppressor, direct current RC superpotential.Signal is introduced superpotential excess current detection module by Input terminal block 5; to behind superpotential excess current detection module, entering over-voltage protection module; voltage dependent resistor (VDR) excess voltage suppressor, direct current RC superpotential suppress circuit and are connected in the signal line; surge voltage is connected in parallel between signal circuit and the ground with the reverse blocking circuit; signal enters the overcurrent protection module subsequently, through causing after the overcurrent protection module on the lead-out terminal row 3 again.
The overcurrent protection module comprises: fastp-acting fuse, direct current quick breaker, overcurrent relay.Fastp-acting fuse, direct current quick breaker, overcurrent relay all are connected in the signal circuit, the main coil of overcurrent relay wherein is connected in the signal line, its node is delivered to the LED driver circuit, when excess current occurring, the main coil action shows by node action control LED malfunction indicator lamp 4.
The purpose of this utility model is: when the superpotential excess current occurring in PLC module 1 port line; the utility model can produce inhibiting effect to fault overvoltage or excess current; when excess current surpasses the door value; at utmost point short time internal cutting off circuit; the port of protection PLC module 1 is not damaged, and indicates which bar circuit by pilot lamp 4 and break down or cut off.
Principle of work of the present utility model is: signal is introduced superpotential excess current detection module by Input terminal block 5; behind superpotential excess current detection module; enter over-voltage protection module; signal enters the overcurrent protection module that is composed in series by fastp-acting fuse, direct current quick breaker, overcurrent relay subsequently, causes on the lead-out terminal row 3 again.When voltage or the current detection value when being higher than fault door value in superpotential excess current detection module circuit of any protection in the passage, then think and detect fault-signal, send signal by superpotential excess current detection module and give corresponding faulty line indicating lamp module, control its LED malfunction indicator lamp 4 conductings and show malfunction; After trouble shooting, circuit recovered normally, superpotential excess current detection module control LED malfunction indicator lamp 4 was turn-offed, and stops fault and shows; When the situations such as PLC module of Lightning Over-voltage, alternating current 220V voltage access 24V power supply occurring, the surge voltage in the over-voltage protection module wherein limits too high voltage with meetings such as reverse blocking circuit, metal oxide voltage dependent resistor (VDR) superpotential inhibition circuit, RC superpotential inhibition circuit and absorbs; Line short or ground connection occur, or situation such as electron device internal fault and when excess current occurring, the LED malfunction indicator lamp 4 by overcurrent relay node control corresponding line shows dissengaged positions.
The utility model includes many protection passages, can realize the protection of a plurality of PLC module port ports simultaneously, and by can realize the I/O port protection to the PLC module of various criterion and specification to its adjustment of installing interior element protection parameter.
It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (6)
1. a PLC module port protective device is characterized in that, comprises connecting terminal block, superpotential excess current detection module, over-voltage protection module, overcurrent protection module, faulty line indicating lamp module,
Described connecting terminal block is at least a pair of, and each is to comprising input end connecting terminal block and output terminal connecting terminal block, and described input end connecting terminal block connects external signal line scan pickup coil side, and described output terminal connecting terminal block connects PLC input/output port terminal;
Described faulty line indicating lamp module comprises faulty line pilot lamp and faulty line pilot lamp driver circuit;
The input end connecting terminal block is connected successively with described superpotential excess current detection module, over-voltage protection module, overcurrent protection module, output terminal connecting terminal block, and the control signal of superpotential excess current detection module, the control signal of overcurrent protection module insert the faulty line pilot lamp driver circuit of indicating fault lamp module;
Superpotential excess current detection module, over-voltage protection module, overcurrent protection module, faulty line indicating lamp module have many identical individual passage; faulty line pilot lamp in the corresponding faulty line indicating lamp module of each bar passage, each passage all is connected with external signal by connecting terminal block.
2. PLC module port protective device as claimed in claim 1 is characterized in that, described superpotential excess current detection module comprises overcurrent sensing circuit and overvoltage detection circuit,
Described overcurrent sensing circuit is connected serially in the signal line, and described overvoltage detection circuit is connected in parallel between signal line and the ground.
3. PLC module port protective device as claimed in claim 1 or 2 is characterized in that, described over-voltage protection module comprises that surge voltage suppresses circuit with reverse blocking circuit, voltage dependent resistor (VDR) excess voltage suppressor and direct current RC superpotential,
Described voltage dependent resistor (VDR) excess voltage suppressor suppresses circuit with described direct current RC superpotential connects, and described surge voltage is connected in parallel between signal circuit and the ground with the reverse blocking circuit.
4. PLC module port protective device as claimed in claim 1 or 2 is characterized in that described overcurrent protection module comprises fastp-acting fuse, direct current quick breaker, overcurrent relay,
Described fastp-acting fuse, direct current quick breaker, overcurrent relay are connected in the signal circuit, and wherein the main coil of overcurrent relay is connected in the signal line, and its node connects the faulty line pilot lamp driver circuit of described faulty line indicating lamp module.
5. PLC module port protective device as claimed in claim 3 is characterized in that described overcurrent protection module comprises fastp-acting fuse, direct current quick breaker, overcurrent relay,
Described fastp-acting fuse, direct current quick breaker, overcurrent relay are connected in the signal circuit, and wherein the main coil of overcurrent relay is connected in the signal line, and its node connects the faulty line pilot lamp driver circuit of described faulty line indicating lamp module.
6. PLC module port protective device as claimed in claim 1 or 2 is characterized in that the faulty line pilot lamp in the described faulty line indicating lamp module is a light emitting diode, described faulty line pilot lamp driver circuit led drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201232173U CN202033641U (en) | 2011-04-25 | 2011-04-25 | PLC (Programmable Logic Controller) module port protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201232173U CN202033641U (en) | 2011-04-25 | 2011-04-25 | PLC (Programmable Logic Controller) module port protector |
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| Publication Number | Publication Date |
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| CN202033641U true CN202033641U (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201232173U Expired - Fee Related CN202033641U (en) | 2011-04-25 | 2011-04-25 | PLC (Programmable Logic Controller) module port protector |
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| CN (1) | CN202033641U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467920A (en) * | 2014-09-11 | 2016-04-06 | 株洲时代新材料科技股份有限公司 | PLC protection method and device of motor coil expanding machine |
| CN107966664A (en) * | 2016-10-19 | 2018-04-27 | 惠州市德赛电池有限公司 | A kind of multiple channel test equipment mistake-proof control method and device |
| CN109633250A (en) * | 2018-11-09 | 2019-04-16 | 国网浙江省电力有限公司台州供电公司 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
| CN110471307A (en) * | 2019-06-27 | 2019-11-19 | 广州白云电器设备股份有限公司 | A kind of current protection simulation system of subway direct-current relay protection device |
-
2011
- 2011-04-25 CN CN2011201232173U patent/CN202033641U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467920A (en) * | 2014-09-11 | 2016-04-06 | 株洲时代新材料科技股份有限公司 | PLC protection method and device of motor coil expanding machine |
| CN107966664A (en) * | 2016-10-19 | 2018-04-27 | 惠州市德赛电池有限公司 | A kind of multiple channel test equipment mistake-proof control method and device |
| CN109633250A (en) * | 2018-11-09 | 2019-04-16 | 国网浙江省电力有限公司台州供电公司 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
| CN110471307A (en) * | 2019-06-27 | 2019-11-19 | 广州白云电器设备股份有限公司 | A kind of current protection simulation system of subway direct-current relay protection device |
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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 |
Granted publication date: 20111109 Termination date: 20160425 |