Product information
Overview
Key Features
- RS485 communication board: Product type designation: CB 1241 RS 485 for SIMATIC S7-1200, with a terminal block.
- Integrated protocol drivers: Supports Freeport, ASCII, Modbus RTU master, Modbus RTU device, and USS. ASCII and USS are available as library functions.
- Point-to-point cable length: Maximum cable length: 1 000 m.
- Freeport communication parameters: Maximum telegram length: 1 kbyte; 7 or 8 bits per character; 1 standard or 2 stop bits; parity options include no parity, even, uneven, mark, and space.
- Modbus RTU addressing: Master and device address area: 1 through 49 999 (Standard Modbus addressing). The master supports 247 slave numbers; each MODBUS network segment allows a maximum of 32 devices, with additional repeaters needed for the maximum configuration.
- Supply and protection: Input current from the backplane bus at 5 V DC, typical: 50 mA. Power loss, typical: 1.5 W. Diagnostics function: Yes. IP degree of protection: IP20.
Technical Summary
| Product | Siemens 6ES7241-1CH30-1XB0, SIMATIC S7-1200 CB 1241 RS485 communication board |
|---|---|
| Interface | RS485, terminal block |
| Protocol support | Freeport, ASCII, Modbus RTU master, Modbus RTU device, USS |
| Input current | 50 mA from backplane bus 5 V DC, typ. |
| Power loss | 1.5 W, typ. |
| Protection | IP20 |
Frequently Asked Questions
What is the exact Siemens product type?
It is the Siemens 6ES7241-1CH30-1XB0 SIMATIC S7-1200 CB 1241 RS485 communication board, product type designation CB 1241 RS 485.
Which protocols does the CB 1241 RS485 board support?
It supports Freeport, ASCII, Modbus RTU master, Modbus RTU device, and USS. ASCII and USS are available as library functions.
What cable length is supported?
The maximum point-to-point cable length is 1 000 m.
What should be included in a quotation request?
Include the required quantity, destination, and any project list or model verification details.
