Action Instruments T700-0000 Loop Powered Isolator

Action Instruments / Transpak T700-0000 Loop Powered Isolator is an in-line signal-isolation module designed for current-loop systems, sitting between a field transmitter or sensor and a control system to provide galvanic isolation while drawing operating power from the input loop. It is specified for 1–50 mA loop current and offers a 600 ohm output drive, enabling common field loads without an external power source. This unit is listed as a used T700-0000 with SKU 50117U and includes a 1-year warranty. Intended for industrial field environments, the T700-0000 helps prevent ground loops and signal interference when interfacing field devices with RTUs, PLCs, or SCADA systems, preserving signal integrity across potentially noisy or grounded installations.