Key Features
- CB 1241 RS 485 communication board: Product type designation: CB 1241 RS 485.
- RS 485 interface: Interfaces/bus type: RS 485, with 1 interface.
- Push-in terminal block: Supplied with a push-in terminal block.
- Integrated protocol drivers: Freeport, ASCII, Modbus RTU master, Modbus RTU device, and USS are supported.
- Diagnostics indication: Diagnostics function: Yes, with DIAG LED and output status indication.
- Serial connection data: Cable length, max.: 1 000 m; Transmission rate, max.: 250 kbit/s.
Applications
- RS 485 serial communication: For connecting a controller to an RS 485 serial communication link.
- Modbus RTU communication: For Modbus RTU master or Modbus RTU device communication over RS 485.
Technical Summary
| Product type designation | CB 1241 RS 485 |
|---|---|
| Interfaces/bus type | RS 485 |
| Number of interfaces | 1 |
| Transmission rate, max. | 250 kbit/s |
| Integrated protocol driver – Freeport | Yes |
| Integrated protocol driver – ASCII | Yes; Available as library function |
| Integrated protocol driver – Modbus RTU master | Yes |
| Integrated protocol driver – Modbus RTU device | Yes |
| Integrated protocol driver – USS | Yes; Available as library function |
| Input current from backplane bus 5 V DC, typ. | 75 mA |
| Power loss, typ. | 0.4 W |
| Diagnostics function | Yes |
| DIAG LED | Yes |
| IP degree of protection | IP20 |
Frequently Asked Questions
What is Siemens 6ES7241-1CA50-0XB0 used for?
It is a SIMATIC S7-1200 G2 CB 1241 Communication Board for RS 485 serial communication.
Which interface does the 6ES7241-1CA50-0XB0 provide?
It provides 1 RS 485 interface.
Does the CB 1241 RS 485 support Modbus RTU?
Yes. It supports Modbus RTU master and Modbus RTU device.
What installation and electrical details are important for this communication board?
It uses a push-in terminal block, has a typical input current of 75 mA from the backplane bus 5 V DC, and a typical power loss of 0.4 W.
