Two instrumemts, Same Loop

[EEENGRX]

I have an existing Radar Level transmitter on a Tank with a HART protocol. I want to hook up a pressure transmitter to same tank but on the already existing loop. what is the best way to run thisn connection as i think thisnis possible since they have same HART protocol.I need very clear ways to run this wiring.

 

[danw2]

Two approaches, either of which will make the cost of running another STP cable out the to the tank look cheap, by comparison.

- HART multidrop: Uses HART enabled AI card with pass through to pass the hart signals through to your asset management software.

- HART multiplexor: A HART mux switches from one HART device to another and maps the data it gets to registers in the mux. The registers are typically accessible via a Modbus/TPC server that your control system then reads the data from.

A 2nd cable is dirt bag simple in comparison. It's just 4-20mA, leave the HART alone.