6ES7241-1CH30-0XB0
SIMATIC S7-1200 CM 1241 RS485 Module · Legacy CM 1241 serial communication module with one RS485 interface, a 9-pole D-sub connection and message-based Freeport support.
Lifecycle note: Use the unit nameplate and current official documentation as final references before approving a replacement.
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+86 15359408275SIMATIC S7-1200 CM 1241 RS485 Module · Siemens SIMATIC S7-1200 CM 1241
Siemens 6ES7241-1CH30-0XB0 is a legacy SIMATIC S7-1200 CM 1241 module that adds a serial RS485 communication channel to a compatible controller.
The exact module provides one 9-pole D-sub serial interface, message-based Freeport operation and documented library support for ASCII and USS communication, with a maximum cable length of 1000 m under the specified conditions.
Before replacement, preserve the TIA Portal hardware configuration and communication blocks, then verify the complete order number, CPU and firmware support, port wiring and termination, baud rate, parity, station addresses, protocol timing and device polling sequence.
| Manufacturer | Siemens |
|---|---|
| Order number | 6ES7241-1CH30-0XB0 |
| Module designation | CM 1241 |
| Controller family | SIMATIC S7-1200 |
| Serial interface | 1 x RS485 with RS422/RS485 physical layer |
| Connector | 9-pole D-sub |
| Communication mode | Message-based Freeport |
| Library protocol support | ASCII and USS |
| Maximum cable length | 1000 m |
| Backplane current | 220 mA maximum from L5+ |
| Typical power loss | 1.1 W |
| Dimensions | 30 x 100 x 75 mm |
| Approximate weight | 150 g |
Siemens 6ES7241-1CH30-0XB0 adds one serial communication channel to a compatible SIMATIC S7-1200 controller for configured point-to-point or multidrop device links.
Siemens 6ES7241-1CH30-0XB0 uses an RS485 interface with an RS422/RS485 physical layer and a 9-pole D-sub connection.
Siemens 6ES7241-1CH30-0XB0 supports message-based Freeport operation, while ASCII and USS functions are available through the documented library approach.
Siemens 6ES7241-1CH30-0XB0 has a documented maximum point-to-point cable length of 1000 m when cable type, topology, termination and communication rate meet the installation rules.
The later CM 1241 must not be treated as a drop-in replacement for Siemens 6ES7241-1CH30-0XB0 until CPU firmware, hardware catalog support, connector pinout, protocol blocks and timing are verified.
Commission Siemens 6ES7241-1CH30-0XB0 by checking polarity and termination, then test baud rate, parity, station addressing, transmit and receive timing, error counters and every connected serial device.
Provide the complete Siemens 6ES7241-1CH30-0XB0 label, hardware revision, CPU and firmware, protocol, baud rate, connector and wiring details, quantity and destination.
Send the complete 6ES7241-1CH30-0XB0 catalog number, revision, quantity, destination and nameplate photo. Identification details will be checked before quotation.
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