Key Features
- CM 1241 RS 422 / 485: Product type designation: CM 1241 RS 422 / 485.
- RS 422 / 485 interface: Interfaces/bus type: RS 422 / 485 (X.27).
- Freeport support: Integrated protocol driver: Freeport, Yes.
- Modbus RTU master and device support: Integrated protocol driver: Modbus RTU master, Yes; Modbus RTU device, Yes.
- 9-pole D-sub socket: Communication connection: 9-pole D-sub (socket).
- 24 V DC supply: Rated value (DC): 24 V.
Technical Summary
| Product type designation | CM 1241 RS 422 / 485 |
|---|---|
| Interfaces/bus type | RS 422 / 485 (X.27) |
| Number of interfaces | 1 |
| Communication connection | 9-pole D-sub (socket) |
| Rated value (DC) | 24 V |
| Supply voltage, lower limit (DC) | 20.4 V |
| Supply voltage, upper limit (DC) | 28.8 V |
| Current consumption, max. | 220 mA; From backplane bus 5 V DC |
| Power loss, typ. | 1.1 W |
| Freeport | Yes |
| IP degree of protection | IP20 |
Applications
- RS 422 / 485 point-to-point communication: Point-to-point connection over RS 422 / 485 with cable length up to 1 000 m.
- Modbus RTU communication: Modbus RTU master and Modbus RTU device communication over the RS 422 / 485 interface.
- Freeport and ASCII data exchange: Freeport communication, including ASCII as a library function.
Frequently Asked Questions
What is the exact model of this Siemens communication module?
The exact model is 6ES7241-1CH32-0XB0, product type designation CM 1241 RS 422 / 485.
What interface does the CM 1241 use?
It uses an RS 422 / 485 interface (X.27) with 1 interface.
What communication functions are supported?
Freeport is supported, and Modbus RTU master and Modbus RTU device are both supported. ASCII is available as a library function.
What supply voltage is required?
Rated value (DC): 24 V. The permissible range is 20.4 V to 28.8 V.
What connection and cable-length details should be checked before ordering?
The module uses a 9-pole D-sub (socket), and the cable length is up to 1 000 m.
