Siemens 6ES7 138-4CA01-0AA0 Power Module For ET 200S

Siemens 6ES7 138-4CA01-0AA0 is the PM-E power module for the SIMATIC ET 200S distributed I/O system. It provides a dedicated 24 V DC power supply to ET 200S modules and includes built-in diagnostics to monitor the health of the power rail and report status to the controller. The module is identified by the part number 6ES7138-4CA01-0AA0 and is described by Siemens as a PM-E power module for ET 200S with 24 V DC input and diagnostics. In Siemens catalogs it is listed as a spare part for ET 200S, confirming its role as the local power source for the remote I/O network while offering diagnostic feedback through the ET 200S system. Common applications include automation installations that deploy ET 200S remote I/O modules requiring a compact, locally powered supply with diagnostic visibility, such as in factory automation lines or packaging equipment. This PM-E DC24V module is designed specifically for ET 200S and is referenced across Siemens documentation as the standard 24 V DC power module with diagnostics for the ET 200S family.