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SIEMENS SIMATIC S7-1200 CM 1241 communication module – 6ES7241-1AH32-0XB0 compact module size is a key element for further expansion, provides flexibility, technological advanced communication functions, specially developed for complex precision automation systems.

Integrated I/O, advanced expandability, transmission speed of 12000kBps, 24V supply voltage

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    Communication modules extend the total communication capabilities of the SIMATIC S7-1200 through additional functions and interfaces.

    SIEMENS SIMATIC Communication Module – 6ES7241-1AH32-0XB0 for use with SIMATIC S7-1200 series module enables communication between the processor and input-output devices. It is an advanced device that helps the programmable logic controller to use its potential as efficiently as possible, and was designed specifically to work with SIMATIC S7-1200 PLCs. Systems USS Drive Protocol and Modbus RTU Master and Slave Protocol libraries are built-in and included in the SIMATIC STEP 7 basic engineering system.

    RS485 and RS232 communication modules were created for character-based serial point-to-point connections. Integrated features like the USS Drive Protocol library and Modbus RTU Master and Slave Protocol are already included in the basic system. CM 1241 communication modules precisely fulfill their function of high-speed, high-performance serial data exchange via point-to-point connection and are available for RS232 or RS422/485 physical transmission properties. The CB 1241 RS 485 communication board can be connected directly to all SIMATIC S7-1200 CPUs. With its advanced expansion capabilities, the SIMATIC S7-1200 is ideally suited to any precision automation task.

    The continuous development and enhancement of the versatility of the communication modules in the S7-1200, new applications such as predictive maintenance and machine learning, with their properties make the entry into digitalization a standard. Offering open communication protocols such as serial communication, PROFIBUS, IO-Link, AS-Interface, PROFINET, Industrial Ethernet, Telecontrol, as well as modern vertical and horizontal communication, MQTT and OPC UA, which require memory access and constant data analysis effectively enable the implementation of this process. Simulation tools like engineering in the TIA portal give full access to the entire digital automation system, diagnostic functions increase efficiency and the connection to management provides increased flexibility and transparency.

    Instant troubleshooting of encountered problems and localization of errors in real time thanks to the new unified display concept reduces total startup time and eliminates unwanted production downtime almost to zero. Built-in, system-integrated diagnostics without additional programming greatly accelerates and facilitates fault detection, gets rid of production delays while providing the grounding necessary for advanced safety functions.

    Safety Integrated makes it possible to connect PROFIsafe devices via PROFIBUS and PROFINET, and control data integrity across all program components. The operation of fail-safe system modules and standard I/O modules is also supported. A system specially created to effectively protect any investment.

    SIEMENS SIMATIC S7-1200 CM 1241 Communication Module – 6ES7241-1AH32-0XB0 is a compact, precise design with integrated I/O, communication interfaces that meet high industry standards, and a range of applied technology functions that makes SIMATIC series modules a permanent, integral part of complex automation solutions.


    Depth 75 mm
    Explosion protection category for gases ATEX – explosion protection for gases, cat. 3G
    Explosion protection category for dust No
    Number of RS-232 hardware connectors 1
    MODBUS protocol support Yes
    Transmission speed 9.6 kBps
    Type of data transmission Serial
    Width 30 mm
    Height 100 mm
    With galvanic separation Yes


    Additional Product Information
    EAN 6940408102095
    UPC 887621416294
    Statistical number of the goods 85176200
    Catalog designation ST72
    FAGR 4510
    Group Code R132