Communication module for medial exposure
The Siemens 6AG1241-1CH30-4XB0 is a SIPLUS S7-1200 CM1241 communication module providing a single RS-422/485 interface (X.27) for Freeport protocol, with conformal coating for medial exposure environments. This spare-part variant is based on the standard 6ES7241-1CH30-0XB0 but adds conformal coating and extended qualification for harsh atmospheres — same part, different passport, as I tell buyers.
The 1.1 W typical power loss keeps the backplane budget lean, and the logic supply draws at most 220 mA from the L5+ bus. Cable length maxes out at 1 000 m on the RS-485 side, which covers most plant-floor daisy chains without a repeater. Altitude derating follows the standard Siemens table: full ratings up to 2 000 m, then 10 K temperature reduction per 1 500 m step beyond.
Protocol support via TIA Portal library
Both USS and ASCII are available as library functions — no custom CFC blocks needed. Existing Freeport code ports directly.
Panel fit vs similar modules
The 30 mm width of this communication module is narrower than the 45 mm analog input modules like 6AG1231-5QD32-4XB0 — they occupy different DIN-rail slots and serve entirely different I/O functions. No substitution or drop-in compatibility. If your BOM called for the analog input, this RS-485 module won’t fit electrically or mechanically.