These models are used to drive resistive loads (sources current). The 4-20mA output signal and DC power share a common lead which is wired directly to the PLC/DCS's internal ground.
Acromag's 340i model is ideal for applications requiring multiple isolators at a single location where all isolators share the same power supply. PLCs and DCSs usually have 24V DC power available at their input terminals.
TT236: Current / milliVolt Input Two-Wire Transmitter
Multi-range ±20mA or ±500mV input
4-20mA ouput (sink/source)
12-32 V DC loop/local power
The TT236 model is a space-saving two-wire transmitter that isolates and converts a DC current or low voltage input to a proportional 4-20mA control signal. A single unit supports both voltage and current input for extra flexibility. Power is received from the output loop current or a DC supply when using a three-wire connection.
Click here to watch a short AcroMaggie video highlighting the TT230 Series.