Key Features
- Communications module: CM 1241 RS 422 / 485
- Interfaces: RS 422 / 485 (X.27), 1 interface
- Protocol functions: Freeport, ASCII, Modbus RTU master, Modbus RTU device, USS
- Connection and form factor: 9-pole D-sub (pin)
- Environmental range: -25…+60 °C with conformal coating
- Lifecycle: Active Product
Applications
- RS 422 / 485 network connection: Connection to devices and networks using the RS 422 / 485 interface.
- Modbus RTU communication: Communication as a Modbus RTU master or Modbus RTU device.
- Freeport data exchange: Freeport communication with a telegram length of up to 1 kbyte.
Technical Summary
| Product type designation | CM 1241 RS 422 / 485 |
|---|---|
| Based on | 6ES7241-1CH32-0XB0 |
| 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 |
| Power loss, typ. | 1.1 W |
| Interfaces/bus type | RS 422 / 485 (X.27) |
| Number of interfaces | 1 |
| Freeport – Bits per character | 7 or 8 |
| Freeport – Number of stop bits | 1 (Standard), 2 |
| Freeport – Parity | No parity (standard); even, uneven, mark (parity bit always 1); space (parity bit always 0) |
| Modbus RTU master – Address area | 1 through 49 999 (Standard Modbus addressing) |
| Modbus RTU – 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 configuration |
| IP degree of protection | IP20 |
| Ambient temperature during operation | -20 °C; = Tmin (incl. condensation/frost); start-up @ 0 °C |
| Ambient temperature during operation, max. | 60 °C; = Tmax |
| Ambient temperature during storage/transportation | -40 °C to 70 °C |
| Installation altitude above sea level, max. | 5 000 m |
Frequently Asked Questions
What is Siemens 6AG1241-1CH32-4XB0?
It is a SIPLUS CM 1241 communications module with RS 422 / 485 interface.
Which interfaces does 6AG1241-1CH32-4XB0 provide?
It provides 1 RS 422 / 485 interface, identified as X.27, with a 9-pole D-sub (pin) connection.
What protocol functions are supported by this CM 1241 module?
It supports Freeport, ASCII, Modbus RTU master, Modbus RTU device, and USS.
What electrical and environmental data should be checked before selection?
Check the 24 V DC rated value, 20.4 V to 28.8 V permissible range, 220 mA maximum current consumption, -20 °C to 60 °C operating temperature, and IP20 degree of protection.
