Basics of Two, Three & Four Wire Transmitters
All devices in a 4-20 mA current loop need to be supplied power from somewhere in order to function. Two-wire
All devices in a 4-20 mA current loop need to be supplied power from somewhere in order to function. Two-wire
4-20mA current-loop circuit have four individual elements: a sensor/transducer, a voltage-to-current converter, loop power supply and a receiver / monitor.
The 4-20 mA current loop is a very robust sensor signaling standard. Current loops are ideal for data transmission because