Pressure sensor wiring has been the installation of the longest user consultation of a pressure sensor problem. Pressure sensors how to wire the first thing to see what form of sensor we use the signal output, pressure sensor current output for 4 ~ 20mA two-wire, voltage output three-wire system, RS485 digital signal output is four-wire system. Pressure sensor current output has two lines, one for the power supply is connected to the red line, one for the power supply negative connection to the blue line. This wiring is relatively simple and straightforward. Pressure sensor voltage output has three wires, one for the power supply is connected to the red line, one for the power supply negative connection to the blue line, one for the output of the positive connection to the yellow line. Pressure sensor RS485 digital signal output has four lines, 1 for the power supply is connected to the red line, 1 for the power supply negative blue line, 1 for the RS485A to the yellow line. There is 1 RS485B connected to the white line. Pressure sensor must be effectively grounded, the pressure sensor grounding has two important roles: the first to protect the safety of the pressure sensor, to prevent the pressure sensor burned. The second is to reduce interference with the pressure sensor. Effective grounding of pressure sensors is one of the roles of preventing interference, is an important guarantee of shielding technology. For product consultation, product customization, agency, technical inquiries, quotations and any other questions, please contact Star sensor hotline: 400-600-4496 !