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Siemens 6ES7241-1AH32-0XB0
· Product image is representative; revision or series may vary. Contact us to request a specific version.
Ships by Thursday, September 17

6ES7241-1AH32-0XB0

RS232 Serial Communication Module

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Payment is by bank wire only in RMB/CNY, GBP, EUR or USD. Amikon does not accept credit cards or provide credit terms. Cleared payment is required before shipment unless the written quotation expressly states otherwise.
Product Condition
Factory New These are new and current items that are procured directly from the manufacturer.
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PRODUCT DESCRIPTION

6ES7241-1AH32-0XB0 connects a serial device to S7-1200

Siemens 6ES7241-1AH32-0XB0 is the SIMATIC S7-1200 CM 1241 RS232 communication module. Its male 9-pin D-sub interface supports full-duplex serial communication and Freeport operation. The module provides configurable baud rates from 300 to 115200 bit/s, with selectable parity, stop bits and flow control.

Use the module for an engineered point-to-point connection to a compatible RS232 device. The PLC program must implement the required message format and handling; electrical connection alone does not provide the device protocol. Verify the pin assignment, firmware and shielded cable length before commissioning the link.
ACTUAL APPLICATIONS

6ES7241-1AH32-0XB0 supports engineered serial device links

The Siemens S7-1200 manual identifies printers, barcode readers and camera or vision systems as PtP applications. Use an RS232-compatible device and implement its message handling in the controller project.
  • 01 · PRODUCTION RECORDS

    Send job data to a serial printer

    Transmit an engineered print message from the controller to a compatible RS232 printer. Match the printer command format and flow-control settings, then verify complete output and the response to an unavailable printer before relying on production records.
  • 02 · ITEM IDENTIFICATION

    Receive barcode data at a station

    Read identification messages from a compatible serial barcode reader. Match message boundaries and character settings, validate the received identifier, and define the handling of missing or invalid scans before using the data to advance the process.
  • 03 · INSPECTION RESULTS

    Exchange data with a vision device

    Connect a camera or vision system that provides a compatible RS232 protocol. Engineer the command and result exchange, including timing and error handling, and verify that the received inspection result is associated with the intended production item.

Technical specifications for 6ES7241-1AH32-0XB0

  • Product Model
    6ES7241-1AH32-0XB0
  • Product Parameters
    RS232 Serial Communication Module
  • In stock
    1 unit
  • Manufacturer
    Siemens
  • Serial interface
    RS232, full duplex
  • Connector
    Male 9-pin D-sub
  • Supported baud rates
    300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200 bit/s
  • Parity options
    None, even, odd, mark or space
  • Stop bits
    1 or 2; default 1
  • Flow control
    Hardware or software
  • Configurable wait time
    0 to 65535 ms
  • Maximum shielded cable length
    10 m
  • Minimum transmitter output
    +/-5 V at 3 kilohms load
  • Maximum transmitter output
    +/-15 V DC
  • Minimum receiver input impedance
    3 kilohms
  • Maximum receiver input voltage
    +/-30 V DC
  • Isolation type-test voltage
    707 V DC: RS232 signal to chassis and CPU logic common
  • Power dissipation
    1 W
  • Current from 5 V DC
    200 mA
View all additional

Alternative Names

6ES7241-1AH32-0XB0 Siemens CM 1241 RS232 S7-1200 Freeport Communication Module
SYSTEM & REPLACEMENT CHECK

Information needed before ordering

Three direct checks to secure your system integration and minimize ordering risks.

Information

System integration Replacement check Manuals & support
CM 1241 POINT-TO-POINT INTERFACE

Match the port and the application protocol

RS232 compatibility includes the signal assignment and electrical limits as well as the baud rate, character format and flow control. Use the official male 9-pin connector table to check both ends of the cable.
Freeport gives the controller program responsibility for the required message exchange. Configure receive boundaries and implement device-specific data handling rather than assuming that a connected cable establishes a working protocol.
Install the CM 1241 locally on the left of the S7-1200 CPU. Check module firmware when selecting legacy or newer point-to-point instructions and keep the shielded cable within the documented 10 m limit.

Features:

  • Full-duplex RS232 serial communication
  • Application-specific message handling
  • Local S7-1200 communication module
The Siemens 6ES7241-1AH32-0XB0 requires port settings, device protocol and module firmware to be checked during system integration and commissioning.
INTERCHANGEABILITY

Verify the complete replacement identity before commissioning

Match 6ES7241-1AH32-0XB0 to the RS232 module. The RS422/485 variant has a different article number, connector and electrical interface, and is not an interchangeable cable connection.
Record the port configuration, hardware identifier, connected-device protocol and project instruction set before removing the module. Check the required firmware for the selected instructions.
Inspect the connector and cable pin assignment, restore the verified configuration, and test complete send/receive exchanges and error handling before returning the device link to production.

Features:

  • Record serial format and message boundaries
  • Check RS232 pin assignment and firmware
  • Validate complete device telegrams
The Siemens 6ES7241-1AH32-0XB0 serial communication module requires replacement verification of the connected device protocol, cable wiring and controller project before return to service.
DOCUMENTATION STATUS

Browse the Manuals, Datasheets, Official Documents, Links

Important Notice: The selected official pages cover CM 1241 RS232 ratings and PtP operation. The installation illustration is the RS232 connector table extracted from original manual page1354; the adjacent RS422/485 section is excluded.

Features:

  • Available Siemens document references are confirmed before order
  • Check serial settings, message format and pin assignment
  • Accessories are supplied only when listed in the quotation
Documentation for the Siemens 6ES7241-1AH32-0XB0 must be checked against the RS232 device connection; confirm manual availability in the written quotation.

Important notice

Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION

Commercial terms without hidden steps

Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
  • 01

    Shipping & delivery

    Dispatch
    Eligible stock: same / next day
    Carriers
    DHL, FedEx or UPS
    Ship from
    Xiamen, China
    Packed size
    8.80 × 11.00 × 5.70 cm
    Shipping weight
    Approx. 0.15 kg
  • 02

    Payment & customs

    Payment
    Bank transfer (T/T)
    Currencies
    USD · EUR · GBP · RMB
    Credit cards
    Not accepted
    HS reference
    85176200
    Origin
    China
  • 03

    Warranty & returns

    Warranty
    12 months from AMIKON
    Inspection
    Label, condition and packing checks
    Returns
    Prior RMA authorisation required
    Compatibility
    Confirm before order
    OEM warranty
    Does not apply
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
  • Part checked

    Full suffix recorded
  • Condition checked

    Label and appearance
  • Packing checked

    Antistatic protection
  • Tracking supplied

    Established couriers
  • Sandy Lin

    Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS

Questions buyers ask about 6ES7241-1AH32-0XB0

Direct answers about identity, compatibility, stock, warranty, payment and shipping.
  • Does the male D-sub socket indicate the direction of every signal?

    Use the official pin table, not connector gender alone. RxD on pin 2 is an input from the DCE device, while TxD on pin 3 is an output to it. Check the remote-device pinout before choosing straight-through or crossed wiring.
  • Why can matching baud rates still produce unreadable characters?

    The two endpoints must also agree on the character format, including parity and stop bits. This module offers none, even, odd, mark and space parity, with one or two stop bits. Compare the complete port configuration with the device documentation.
  • Can a barcode reader be connected without writing receive logic?

    A physical RS232 connection is only the interface. Freeport requires the user program to handle the reader message, including the configured start and end conditions, received data and error response. Validate representative scans before enabling downstream actions.
  • Is a 707 V isolation test rating an allowable continuous operating voltage?

    No. Siemens identifies 707 V DC as a type-test value between the RS232 signal and chassis or CPU logic common. It is not a continuous signal rating. The separately specified receiver input maximum is +/-30 V DC.
  • What happens if the receive end condition does not match the incoming message?

    The communication module may not deliver the intended complete frame when expected. Match the configured character sequence, length or timing condition to the actual device telegram and examine received data before changing the application parser.
  • Can this local communication module be placed in a remote PROFINET rack?

    The S7-1200 manual limits CM 1241 modules to the local position on the left of the CPU. The distributed PtP examples use different ET 200 communication modules. Do not infer remote-rack compatibility from the shared PtP instruction family.
  • What firmware detail matters when migrating from legacy serial instructions?

    Siemens specifies CM 1241 firmware V2.1 or later for the newer point-to-point instruction set. Existing legacy instructions remain supported as documented. Inspect the installed firmware and project instructions rather than replacing the program solely because the spare is newer.
  • Should pin 9 be used as an extra general-purpose input?

    No. The connector table identifies pin 9 as RI, ring indicator, and marks it not used. Keep the designated logic ground on pin 5 and chassis connection on the shell; do not repurpose connector pins for unrelated signals.
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