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Siemens 6AG1241-1AH30-4XB0 — PLC Communication Modules

Siemens 6AG1241-1AH30-4XB0 SIPLUS CM 1241 RS-232

MPN6AG1241-1AH30-4XB0

Siemens SIPLUS S7-1200 CM 1241 RS-232 communications module, 6AG1241-1AH30-4XB0, conformal coated, -40 to +70 °C, 1.1 W typ. power loss, 75 mm depth.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

6AG1241-1AH30-4XB0 — Electrical
ParameterValue
Current consumption, max.220 mA; From L5+; logic
Power loss (typ.)1.1 W
6AG1241-1AH30-4XB0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-40 °C
6AG1241-1AH30-4XB0 — Mechanical
ParameterValue
Width30 mm
Height100 mm
Depth75 mm
6AG1241-1AH30-4XB0 — Other specifications
ParameterValue
ASCIIYes
Weight, approx.150 g
Fall height, max.0.3 m; five times, in product package
Cable length, max.10 m
Interfaces (bus type)RS 232C (V.24)
Number of interfaces1
Permissible temperature change5°C to 55°C, 3°C / minute
Ambient air temperature-barometric pressure-altitudeTmin ... Tmax at 1 080 hPa ... 795 hPa (-1 000 m ... +2 000 m) // Tmin ... (Tmax - 10 K) at 795 hPa ... 658 hPa (+2 000 m ... +3 500 m) // Tmin ... (Tmax - 20 K) at 658 hPa ... 540 hPa (+3 500 m ... +5 000 m)

Product details

Ruggedised RS-232 for the S7-1200 backplane

The 6AG1241-1AH30-4XB0 is the SIPLUS variant of the standard CM 1241 RS-232 communications module (6ES7241-1AH30-0XB0), built for extended ambient conditions. It adds conformal coating to the PCB and is qualified across -40 to +70 °C, compared to the standard part's 0 to +55 °C envelope. That temperature spread holds the unit on the grid in a turbine hall or a compressor shed where the HVAC cycles off overnight. Power dissipation is 1.1 W typ — well within the S7-1200 backplane budget, even with the adjacent modules pulling their share. The 220 mA max draw from the L5+ logic bus means no separate field supply is needed for the serial interface itself.

For a BOM line that needs the -40 to +70 °C range and conformal coating, this is the direct fit; the standard CM 1241 does not carry those ratings.

Frequently asked questions

What is the difference between 6AG1241-1AH30-4XB0 and 6ES7241-1AH30-0XB0?

The 6AG1241-1AH30-4XB0 is the SIPLUS ruggedised version of the standard CM 1241 RS-232 (6ES7241-1AH30-0XB0). It adds conformal coating to the PCB and extends the operating temperature range from 0…+55 °C to -40…+70 °C. The dimensions, backplane interface, and Freeport protocol support are identical. The SIPLUS variant is the correct choice when the module sits in a non-conditioned enclosure or a washdown zone.

Does 6AG1241-1AH30-4XB0 support Freeport protocol?

Yes, Freeport is supported. This is the point-to-point ASCII communication mode that lets the S7-1200 CPU talk to serial devices using custom character frames. Modbus RTU is not a native protocol on this module; Freeport handles the raw byte stream, and the CPU logic manages the Modbus framing in the user program.

How do I get current pricing and availability for 6AG1241-1AH30-4XB0?

No stock-holding claim is made here.

MPN
6AG1241-1AH30-4XB0