Reliance 61C540A Analog Input Current Module

Reliance 61C540A Analog Input Current Module is a 16-channel, 4-20 mA analog input card designed for Multibus-based Reliance Electric AutoMax/AutoMate systems, later cataloged by Rockwell Automation as Reliance 61C540A. Each channel accepts a loop-powered 4-20 mA signal and converts it to a digital value for the host controller, enabling monitoring of multiple process signals from a single module. The module is Multibus-compatible and supports sixteen independent current inputs, suitable for scaling sensor networks in batch or continuous processes. In certain installations, an external power supply may be required to drive the 4-20 mA transmitters connected to the inputs. Typical applications include process monitoring, data acquisition, and instrumentation retrofits in manufacturing environments where AB-compatible analog input modules interface with legacy AutoMax/Automate controllers.