Siemens 6ES7138-4CA01-0AA0 is a PM-E power module for the ET 200S distributed I/O system that provides 24 V DC power with integrated diagnostics to downstream I/O groups. As a spare part, it is designed to replace a PM-E module in SIMATIC DP-based ET 200S installations. The unit operates on 24 V DC and features diagnostics with a 4 mA diagnostic current, aiding monitoring of the power rail and facilitating rapid fault isolation in automation panels.
