Acromag 816-20 Analog Signal Isolator 4-20mA Module

The Acromag 816-20 Analog Signal Isolator 4-20mA module is a galvanically isolated signal interface designed to pass a 4-20 mA current loop from a field device to a control system, preserving signal integrity in noisy industrial environments. It is part of Acromag's 4-20 mA isolator family, which includes loop-powered and externally powered variants and is offered in single- or multi-channel configurations; for example, the 270i is an input-loop-powered isolator that provides an isolated 4-20 mA output. The isolator provides isolated input and output signals to protect the controller from field-side transients and ground loops while preserving the 4-20 mA current range for the receiving device. Typical applications include interfacing process transmitters and sensors with PLCs, DCS, and data-acquisition systems in industrial automation where galvanic isolation is required. In Acromag's 600T family lineage, isolators such as 631T-0500 illustrate the standard 4-20 mA input to isolated 4-20 mA output configuration with full isolation.