Milliamp Simulation - Ecom MA 400 Operating Instructions Manual

4.2 Milliamp Simulation

Figure 4 shows how to connect the MA 400 to act as a two-wire transmitter using an external
power supply. In this application the power for the loop comes from the external supply and
the MA 400 simply controls the current flow through the loop. The procedure for controlling
the output is the same as the milliamp source.
Figure 4 - Simulating 4 to 20 mA