Siemens 6ES7241-1CH30-0XB0 Communication Module

The Siemens 6ES7241-1CH30-0XB0 communication module adds a versatile RS-422/RS-485 serial interface to the SIMATIC S7-1200 system. This module enables seamless data exchange between the S7-1200 PLC and serial devices like drives or barcode readers. It supports the Modbus RTU protocol and enables freeport communication for custom serial applications. This communication module offers electrical isolation for enhanced signal integrity and noise immunity.

Technical Specifications of Siemens 6ES7241-1CH30-0XB0

The Siemens 6ES7241-1CH30-0XB0 communication module features a single RS-422/RS-485 serial port that operates at up to 115.2 kbps. It supports both half-duplex and full-duplex communication modes. The module includes a 9-pin D-sub connector for easy wiring. It consumes approximately 1.5 W of power from the backplane bus. The module provides electrical isolation between the S7-1200 and the connected serial device.

Parameter	Specification
Model Number	Siemens 6ES7241-1CH30-0XB0
Product Type	Communication Module (CM 1241)
Interface Type	RS-422 / RS-485
Baud Rate	Up to 115.2 kbps
Communication Modes	Half-duplex and full-duplex
Connector	9-pin D-sub male
Protocols	Modbus RTU, Freeport
Electrical Isolation	500 V DC
Current Consumption	70 mA from 5 V bus, 50 mA from 24 V DC
Power Loss	1.5 W typical
Dimensions (W x H x D)	30 mm x 100 mm x 75 mm
Weight	Approx. 0.15 kg
Protection Class	IP20

Integration and Application

The Siemens 6ES7241-1CH30-0XB0 communication module mounts directly on the S7-1200 DIN rail and connects via the backplane bus. It communicates with drives, HMIs, and other serial devices using standard protocols. The module supports cable lengths up to 1,200 meters for RS-422 or RS-485 applications. You can deploy this communication module for process monitoring and data acquisition tasks with legacy serial equipment.