Nowadays, many working conditions need to use a control system such as PLC to transmit the data measured by the transmitter to the control room for display or for the control system, which involves the connection between the transmitter and the PLC. Today, we will introduce how the transmitter with current, voltage, and digital signal output is connected to the PLC. Current output transducer The current output transmitter is a two-wire system, two signal lines should both supply power to the transmitter and provide current signals, usually the transmitter is passive, so that a power supply is connected in series between the transmitter and the PLC to drive the transmitter to work. It is necessary to connect the positive of the PLC to the transmitter and the negative of the PLC to the negative of the transmitter. The jumper is a two-wire current signal. Voltage output transmitters The voltage output transmitter is a three-wire system, and when connected with the PLC, the PLC needs to be positively connected to the transmitter, the PLC negative to the transmitter, and the PLC jumper to be the voltage signal. Digital output transmitter The digital output transmitter is a four-wire system, when connected with the PLC, the PLC is receiving current, the PLC is negatively connected to the transmitter, and the PLC line is a four-wire current. If you have any questions about product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi: 400-600-4496!