6ES7138-4CB10-0AB0 SIEMENS power module Description And Features The Siemens 6ES7138-4CB10-0AB0 is a power module (PM-E) designed for use in the SIMATIC ET200S distributed I/O system.It provides the power supply and diagnostics functionality for a voltage group of modules in an ET200S station.It supports a relatively broad input voltage range including AC and/or DC variants depending on version. For example, Siemens’ listing indicates “AC 24 … 230 V” as part of the specificat