Reliance Electric 707312-1R Communications Tap

Reliance Electric 707312-1R Communications Tap (also cataloged as 57C380) is a compact passive tap module designed for coaxial network use in Reliance Automax DCS systems. It provides two BNC connectors for coaxial access and a single RS-232 female interface, enabling simple monitoring and interconnection on legacy Reliance control networks. As a passive device, it requires no power, and is intended for diagnostic or interfacing roles within Automax DCS installations. The unit is discontinued by the manufacturer, with several listings identifying it as 57C380 / 707312-1R and noting a weight around 0.65 lb. Typical applications include linking Automax DCS components over a coaxial run and offering a local serial connection for configuration or diagnostics in older Baldor Reliance/ASEA Brown Boveri networks.