Semiconductor equipment control circuit based on safety relay

Abstract

The utility model discloses a semiconductor equipment control circuit based on a safety relay, which comprises a molded case circuit breaker, a programmable logic controller, a control loop, a first switching power supply and a second switching power supply, the input end of the first switching power supply is connected with the molded case circuit breaker, and the output end of the first switching power supply is connected with an EMO / emergency stop loop; the input end of the second switching power supply is connected with the molded case circuit breaker through the alternating current contactor, and the output end is connected with the programmable logic controller and the control loop; the EMO / emergency stop loop comprises an active dual-channel safety relay, and the active dual-channel safety relay is a relay with an indicating lamp. According to the utility model, a relay with an indicating lamp is added or another indicating lamp is added behind each or more EMO / emergency stop loop, so that the fault position of the EMO / emergency stop loop can be quickly positioned, and the fault point can be quickly repaired to realize quick recovery; meanwhile, the operation difficulty is reduced, and the operation safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of emergency stop control loop, in particular to a kind of semiconductor equipment control circuit based on safety relay. BACKGROUND

[0002] In the field of electrical engineering and automation, safety system engineering, control system design and semiconductor safety design, EMO (emergency stop) loop and emergency stop loop are essential components. These loops are mainly used to quickly stop the operation of the equipment in emergency situations to ensure the safety of personnel and equipment. Safety relays are key components in these loops, which are used to detect abnormal conditions in the loop and disconnect the power supply when an anomaly is detected, thereby achieving the function of emergency stop. Especially for semiconductor equipment, there is a need to disconnect the total power when EMO emergency stop is triggered. When EMO emergency stop is triggered, the hardware loop directly disconnects the AC contactor to disconnect the AC power, and the AC load and control loop are all powered off, protecting personnel from injury.

[0003] In the existing technology, when EMO / emergency stop loop appears abnormal, the method of segmented measurement is usually used to locate the fault point. This method requires the use of a multimeter or other measuring tools to measure each part of the loop one by one to determine the location of the fault. This method can locate the fault, but it requires the operator to have certain electrical knowledge and the operation process is relatively cumbersome, requiring a lot of time.

[0004] From the above, the existing technical solutions have the following problems: First, because the circuit needs to be measured in sections, the operation process is relatively cumbersome and requires a lot of time. This will undoubtedly reduce production efficiency for equipment on the production line. Second, because measuring tools are needed, there is a certain safety risk, and improper operation may cause secondary injury to personnel and equipment. In addition, the existing technology has a lot of room for improvement in quickly locating the fault position of the EMO / emergency stop loop. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide a semiconductor equipment control circuit based on safety relay, which can quickly locate the fault position of the EMO / emergency stop loop, disconnect the power supply more quickly, improve the reliability of emergency stop, reduce the difficulty of operation, and improve the safety of operation.

[0006] The utility model discloses a technical scheme that solves the above technical problem is provided with a semiconductor equipment control circuit based on safety relay, including moulded case circuit breaker, programmable logic controller, control loop, first switch power supply and second switch power supply, wherein, the input of first switch power supply is connected moulded case circuit breaker, the output of first switch power supply is connected EMO / emergency stop loop, the input of second switch power supply is connected moulded case circuit breaker through alternating current contactor, and the output of second switch power supply is connected programmable logic controller and control loop, the moulded case circuit breaker is powered for EMO / emergency stop loop through first switch power supply, and EMO / emergency stop loop includes active double channel safety relay, and the active double channel safety relay is the relay with indicator lamp, is used to indicate whether normal power supply.

[0007] Further, the moulded case circuit breaker is electrically connected with the alternating current load of the semiconductor equipment through the alternating current contactor, the leakage protection switch and the semiconductor equipment;When the power supply condition is met and the double channel emergency stop loop is normal, the active double channel safety relay outputs the contact to close, controls the alternating current contactor control loop to close, so that the alternating current contactor is powered for the subsequent second switch power supply, leakage protection switch, alternating current load, programmable logic controller and control loop.

[0008] Further, the active double channel safety relay is the relay with model No.3000-16013-3100020.

[0009] Further, the active double channel safety relay is placed in the electrical cabinet, and an indicator lamp located on the electrical cabinet or outside the electrical cabinet is further connected to the EMO / emergency stop loop.

[0010] Further, the indicator lamp is ABB's CL2-502G or Siemens's 3SU1102-6AA40-1AA0.

[0011] The semiconductor equipment control circuit based on safety relay provided by the utility model has the following beneficial effects compared with the prior art: the semiconductor equipment control circuit based on safety relay provided by the utility model adds a relay with an indicator lamp or further adds an indicator lamp after each or more than one EMO / emergency stop loop, and the indicator lamp is controlled through the relay; the fault position of the EMO / emergency stop loop can be quickly located, the problem point can be quickly repaired to realize quick machine recovery; meanwhile, the operation difficulty is reduced, and the safety of operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The utility model discloses a semiconductor equipment control circuit based on safety relay circuit diagram;

[0013] Figure 2 The utility model discloses EMO emergency stop control loop circuit diagram;

[0014] Figure 3 The utility model discloses EMO emergency stop control loop plus indicating lamp control loop. DETAILED DESCRIPTION

[0015] The utility model will be further described below in combination with the drawings and examples.

[0016] Figure 1 The utility model discloses semiconductor equipment control circuit based on safety relay's circuit diagram.

[0017] The utility model provides a semiconductor equipment control circuit based on safety relay, including moulded case circuit breaker, programmable logic controller, control loop, first switch power supply and second switch power supply, wherein, the input of first switch power supply is connected moulded case circuit breaker, and the output of first switch power supply is connected EMO / emergency stop loop, and the input of second switch power supply is connected moulded case circuit breaker through alternating current contactor, and the output of second switch power supply is connected programmable logic controller and control loop, moulded case circuit breaker is powered for EMO / emergency stop loop through first switch power supply, and EMO / emergency stop loop includes active double channel safety relay, and active double channel safety relay is the relay of indicating lamp, is used for indicating whether normal power supply.

[0018] The utility model provides semiconductor equipment control circuit based on safety relay, and moulded case circuit breaker is electrically connected through alternating current contactor, leakage protection switch and semiconductor equipment's alternating current load, when satisfying power supply condition and double channel emergency stop loop is normal, active double channel safety relay output contact closes, and alternating current contactor control loop is closed, and then makes alternating current contactor power supply second switch power supply, leakage protection switch, alternating current load, programmable logic controller and control loop of subsequent.

[0019] Please see Figure 2 , and K910 is active double channel safety relay, and can select sick, pilz and the like brand, and S900, S910 are double channel EMO / emergency stop button, and K900A, K900B, K910A, K910B are the relay of indicating lamp, and X900 is low voltage terminal.

[0020] The utility model provides semiconductor equipment control circuit based on safety relay adopts active safety relay module, and adds a relay with indicating lamp or adds an indicating lamp again through the relay to control the indicating lamp after each or more than 1 EMO / emergency stop, and when EMO / emergency stop or line exception, the indicating lamp also can show exception, and can be positioned to the fault point quickly.

[0021] The state change of the indicator light is used to determine the fault location of the EMO / emergency stop circuit. If the indicator light shows an abnormality, it indicates that there may be a fault in the circuit, which needs to be further checked.

[0022] By means of segmented inspection, the possible fault points are gradually ruled out, and the specific fault location is finally located. For example, according to the working state of each relay or indicator light, the fault point is quickly located.

[0023] During operation, strictly follow the operation procedures to avoid safety risks caused by improper operation. At the same time, strengthen the training and operation guidance of the operating personnel, ensure that the operating personnel have the corresponding electrical knowledge and can correctly operate and use the measuring tools.

[0024] When designing and installing the EMO / emergency stop circuit, modular design is preferred to facilitate fault diagnosis and maintenance. At the same time, when designing, fully consider the possibility of failure, take appropriate protective measures, and improve the reliability and safety of the system.

[0025] Please continue to see Figure 2 , K900A, K900B, K910A, K910B are Figure 1 K900A, K900B, K910A, K910B corresponding contacts in

[0026] When the A1 and A2 circuits of K910 are powered,

[0027] When the EMO / emergency stop button S900 is not triggered and the cable of S11 to X900:1 terminal is normal, the indicator light of the lamp relay K900A will be lit and its contacts 11 and 14 will be attracted, then the P900A indicator light will be lit. It means that as long as the K900A indicator light or the P900A indicator light is lit, it represents that the 11 and 12 circuits of the EMO / emergency stop button S900 and the cable of S11 to X900:1 terminal are normal, otherwise it represents that the 11 and 12 circuits of the EMO / emergency stop button S900 are disconnected or the cable of S11 to X900:1 terminal may be damaged or poor contact.

[0028] When the EMO / stop button S900 is not triggered and the cable of the S21 to X900:2 terminal is normal, the indicator lamp of the relay K900B with a lamp is lighted, the contacts 11 and 14 of the relay K900B are attracted, and then the indicator lamp P900B is lighted. It means that as long as the indicator lamp K900B or the indicator lamp P900B is lighted, the 21 and 22 circuits of the EMO / stop button S900 and the cable of the S21 to X900:2 terminal are normal, otherwise, the 21 and 22 circuits of the EMO / stop button S900 are disconnected or the cable of the S21 to X900:2 terminal can be damaged or in poor contact.

[0029] When the EMO / stop button S910 is not triggered and the cable of the X900:1 to X900:4 terminal is normal, the indicator lamp of the relay K910A with a lamp is lighted, the contacts 11 and 14 of the relay K910A are attracted, and then the indicator lamp P910A is lighted. It means that as long as the indicator lamp K910A or the indicator lamp P910A is lighted, the 11 and 12 circuits of the EMO / stop button S910 and the cable of the X900:1 to X900:4 terminal are normal, otherwise, the 11 and 12 circuits of the EMO / stop button S910 are disconnected or the cable of the X900:1 to X900:4 terminal can be damaged or in poor contact.

[0030] When the EMO / stop button S910 is not triggered and the cable of the X900:2 to X900:3 terminal is normal, the indicator lamp of the relay K910B with a lamp is lighted, the contacts 11 and 14 of the relay K910B are attracted, and then the indicator lamp P910B is lighted. It means that as long as the indicator lamp K910B or the indicator lamp P910B is lighted, the 21 and 22 circuits of the EMO / stop button S910 and the cable of the X900:2 to X900:3 terminal are normal, otherwise, the 21 and 22 circuits of the EMO / stop button S910 are disconnected or the cable of the X900:2 to X900:3 terminal can be damaged or in poor contact.

[0031] The semiconductor equipment control circuit based on the safety relay has the following beneficial effects:

[0032] 1) The fault positioning speed is improved: the utility model discloses a relay with an indicator lamp or an indicator lamp controlled by the relay is additionally arranged after each or more than one EMO / stop, so that the indicator lamp also displays abnormity when EMO / stop or line abnormity, thereby the fault point can be positioned quickly. Compared with the method of using a multimeter for segmented measurement in the prior art, the utility model greatly improves the fault positioning speed, reduces the fault troubleshooting time and improves the production efficiency.

[0033] 2) Reduce the difficulty of operation: the utility model only needs to observe the state of the indicator light by the operator to locate the fault point. This is more easy to operate for the operator. At the same time, since the use of measuring tools is reduced, the safety risk in the operation process is also reduced.

[0034] 3) Improve safety: the utility model can monitor the state of EMO / emergency stop circuit in real time through the active safety relay module, and disconnect the power supply when detecting abnormality, so as to realize the function of emergency stop. Compared with the prior art, the technical scheme improves the safety of the system, and guarantees the safety of personnel and equipment.

[0035] 4) High flexibility: the utility model can be transformed in the existing EMO / emergency stop circuit, without the need of large-scale modification of the whole system, so it has high flexibility. At the same time, since the modular design is adopted, the technical scheme can also be extended and modified according to actual needs to adapt to different application scenarios. In general, compared with the prior art, the technical scheme has remarkable superiority in improving fault positioning speed, reducing operation difficulty, improving safety, flexibility and the like.

[0036] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model, anyone skilled in the art can make some modifications and improvements without departing from the spirit and scope of the utility model, so the protection scope of the utility model should be limited by the claims.

Claims

1. A safety relay based semiconductor device control circuit comprising a molded case circuit breaker, a programmable logic controller, a control loop, a first switched power supply and a second switched power supply, characterized in that, The input end of the first switching power supply is connected with the molded case circuit breaker, the output end of the first switching power supply is connected with the EMO / emergency stop circuit, the input end of the second switching power supply is connected with the molded case circuit breaker through the AC contactor, and the output end of the second switching power supply is connected with the programmable logic controller and the control circuit; the molded case circuit breaker supplies power for the EMO / emergency stop circuit through the first switching power supply, the EMO / emergency stop circuit comprises an active double-channel safety relay, the active double-channel safety relay is a relay with an indicator lamp, and is used for indicating whether the power supply is normal.

2. The safety relay based semiconductor device control circuit of claim 1, wherein, The molded case circuit breaker is electrically connected with the AC load of the semiconductor equipment through the AC contactor, the leakage protection switch and the semiconductor equipment; when the power supply condition is met and the double-channel emergency stop circuit is normal, the active double-channel safety relay outputs a closed contact point, controls the AC contactor control circuit to be closed, and makes the AC contactor supply power for the subsequent second switching power supply, the leakage protection switch, the AC load, the programmable logic controller and the control circuit.

3. The safety relay based semiconductor device control circuit of claim 1, wherein, The active double-channel safety relay is a relay with a model number of 3000-16013-3100020.

4. The safety relay based semiconductor device control circuit of claim 1, wherein, The active double-channel safety relay is arranged in an electrical cabinet, and an indicator lamp arranged on the electrical cabinet or outside the electrical cabinet is further connected to the EMO / emergency stop circuit.

5. The safety relay based semiconductor device control circuit of claim 4, wherein, The indicator lamp is ABB's CL2-502G or Siemens's 3SU1102-6AA40-1AA0.

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