Detection circuit for preventing wrong wiring of pressure sensor

The invention provides a wrong wiring prevention detection circuit for a pressure sensor. An interface module is connected with a 5V voltage stabilization module and a relay set module, and the 5V voltage stabilization module is connected with a 3.3 V voltage stabilization module, the relay set module and a state indication module; the relay group module is connected with the RS485-to-TTL module, the RS485-to-TTL module is connected with the MCU and the filter module thereof, and the MCU and the filter module thereof are connected with the state indication module; the state indication module comprises a light-emitting diode D1 switch branch, a light-emitting diode D2 switch branch and a light-emitting diode D3 switch branch; and a light emitting diode D4 and a resistor R17 are connected in series and then are arranged between the VCC5V voltage output end of the 5V voltage stabilizing module and the ground. The device is simple in structure and reliable in performance, and can quickly and accurately detect whe