We are using siemans PLC and yokogawa DCS. I want to connect a single 2-wire level transmitter for both DCS & PLC. Already we connected this transmitter to PLC and working well. and we need same transmitter indication at DCS? PLZ Suggest how to connect?

 

> We are using siemans PLC and yokogawa DCS. I want to connect a single 2-wire level transmitter for both DCS & PLC.
> Already we connected this transmitter to PLC and working well. and we need same transmitter indication at DCS? PLZ Suggest how to connect?

What protocol is on these 2 wires?
4-20mA, 0-10 VDC, Modbus RTU?

 

If both your DCS and PLC are close together all you have to do is wire to the 4-20 mA input of 1 then take a pair of wires from across the conditioning resistor and run them to a 1-5V input of the other.

Another method is to use a signal isolator in series with the 4-20 mA loop and connect it to the 4-20mA input of the other system

Easy Peasy

 

By the way

The signal isolator method is how you connect 1 transmitter to a safety shutdown system, the shutdown system gets the primary signal and the other system gets the re-transmitted signal

Roy