Siemens 6ES71944FA000AA0 ET 200PRO I/O Module

Siemens 6ES71944FA000AA0 ET 200PRO CM IO 1 x M23 is a connection module for the SIMATIC ET 200PRO distributed I/O system, featuring a single M23 connector to interface IO electronics with the ET 200PRO backplane. As a CM IO module, it serves as the designated interface for an ET 200PRO IO module in the system, enabling modular expansion of distributed automation I/O within a control cabinet or machinery installation. The part number corresponds to ET200PRO CM IO with 1 x M23, and it is used within the ET 200PRO family to link a remote IO channel to the network or controller infrastructure. Typical applications include configuring a compact, point‑to‑point connection in Siemens automation setups where a single IO module must be interfaced via the M23 receptacle, facilitating organized wiring and scalable I/O topology. In SIMATIC ET 200PRO deployments, this component supports the modular philosophy of the platform by providing a dedicated connection point for one IO module, helping to preserve the integrity of field wiring and streamline maintenance in industrial environments.