Siemens 6ES7137-6AA01-0BA0 CM PtP

Siemens 6ES7137-6AA01-0BA0 CM PtP is a SIMATIC ET 200SP communications module that installs in the CM PtP slot to provide serial network access for the ET 200SP I/O system. It supports RS-422, RS-485 and RS-232 serial connections and enables MODBUS RTU master or slave communications, as well as 3964 (R) and USS protocols, via the Freeport interface. The device supports data transmission up to 250 kbit/s and is specified as compatible with ET 200SP CM PtP BU-Typ A0 configurations. This makes it suitable for connecting PLCs to serial field devices and other Modbus RTU networks while simplifying wiring in distributed automation architectures. With its targeted function as a CM PtP serial bridge, it helps enable reliable, standards-based communication between Siemens controllers and third-party equipment in industrial environments.