Figure 2 shows how to create a 4 to 20 ma current loop circuit for this style of controller A sensor, transmitter, loop power supply, and receiver/monitor A 24 vac transformer provides power to the controller
0-10V and 4-20mA Current Loop 4 Channels USB Analog IO Module
Using a current output sensor provides a steady output while the voltage in the loop circuit drops from the resistance of the wire
In this way, industry standard.
Ensure accurate signal transmission and proper installation. Transmitters are available with a wide variety of signal outputs Current loops are ideal for data transmission because of their inherent insensitivity to electrical noise.
