Key Features
- Serial communication module: SIMATIC S7-1200 communication module CM 1241 for RS 422 / 485.
- One RS 422 / 485 interface: Interfaces/bus type: RS 422 / 485 (X.27), number of interfaces: 1.
- Freeport and protocol support: Freeport: Yes; ASCII: Yes; Modbus RTU master: Yes; Modbus RTU device: Yes; USS: Yes.
Applications
- Freeport serial communication: Serial data exchange using Freeport.
- Modbus RTU master communication: Communication as a Modbus RTU master.
- Modbus RTU device communication: Communication as a Modbus RTU device.
- ASCII serial messaging: ASCII communication available as a library function.
Technical Summary
| Product type designation | CM 1241 RS 422 / 485 |
|---|---|
| Interfaces/bus type | RS 422 / 485 (X.27) |
| Number of interfaces | 1 |
| Rated value (DC) | 24 V |
| permissible range, lower limit (DC) | 20.4 V |
| permissible range, upper limit (DC) | 28.8 V |
| Current consumption, max. | 220 mA; From backplane bus 5 V DC |
| Modbus RTU master – max. number of devices | 247; slave numbers 1 through 247, per MODBUS network segment maximum 32 devices, additional repeaters needed to expand the network to maximum |
| Diagnostics function | Yes |
| IP degree of protection | IP20 |
Frequently Asked Questions
What is the Siemens 6ES7241-1CH32-0XB0 used for?
It is a SIMATIC S7-1200 communication module CM 1241 for RS 422 / 485 serial communication.
Which interface does the 6ES7241-1CH32-0XB0 provide?
It provides one RS 422 / 485 (X.27) interface with a 9-pole D-sub (socket).
What is the supply voltage range for the CM 1241 RS 422 / 485?
Rated value (DC): 24 V. Permissible range: 20.4 V to 28.8 V.
How many devices can the Modbus RTU master support?
The Modbus RTU master supports up to 247 devices; slave numbers 1 through 247 are listed, with 32 devices maximum per MODBUS network segment.
Does the module support diagnostics and protection information?
Yes. Diagnostics function is available, and the degree of protection is IP20.
