Siemens 6ES7241-1AH32-0XB0 is the CM 1241 RS232 communication module for the SIMATIC S7-1200 PLC family, enabling an RS-232 serial link on the system.
It provides a single RS-232 interface via a 9-pin D-sub connector for point‑to‑point communication with RS-232 devices or Modbus‑capable peripherals, expanding the S7-1200’s serial connectivity options.
According to Siemens documentation, the module supports Freeport 247 with slave numbers 1 through 247, and a MODBUS network segment maximum of 32 devices, with repeaters required to scale beyond that configuration.
