I am developing a Processor in the Loop (PIL) where I want to simulate sensors communicating via 4-20ma current loop protocol. I want to be able to dynamically (ie, under control of a computer) program the sensor value. I see NI has a board the implements eight 4-20ma receivers. I am looking for a device which can simulate a 4-20ma "transmitter." Note in my application, the receiver also contains the current source for the circuit.
Any suggestions or ideas?
Thanks for the reply.
No, just talkin' plain old 4-20ma protocol without HART. I will take a look at the product you mentioned; perhaps it would support the basic 4-20ma protocol as well as the HART.