Key Features
- CM 1241 RS 232 / 422 / 485: Product type designation for the communication module.
- RS 232 (full duplex) / 422 / 485: 1 interface for serial communication.
- Push-in terminal block: Connection style for installation.
- Diagnostics function: Built-in diagnostics support for status checking.
- DIAG LED: Status indication is available.
Applications
- Serial communication: Serial communication over RS 232, RS 422, or RS 485.
- Modbus RTU communication: Modbus RTU master or Modbus RTU device communication on the serial interface.
Technical Summary
| Product type designation | CM 1241 RS 232 / 422 / 485 |
|---|---|
| Interfaces/bus type | RS 232 (full duplex) / 422 / 485 |
| Number of interfaces | 1 |
| RS 232 transmission rate, max. | 115.2 kbit/s |
| RS 485 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 |
| Input current from backplane bus 5 V DC, typ. | 170 mA |
| Power loss, typ. | 0.9 W |
Frequently Asked Questions
What is Siemens 6ES7241-1EA50-0XB0?
It is a SIMATIC S7-1200 G2 CM 1241 communication module.
Which interfaces does 6ES7241-1EA50-0XB0 provide?
It provides 1 interface with RS 232 (full duplex) / 422 / 485.
Does the CM 1241 support Modbus RTU?
Yes. It supports Modbus RTU master and Modbus RTU device.
What connection and diagnostics details are available for this module?
It uses a push-in terminal block and includes a diagnostics function and DIAG LED.
