Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Module type | CM 1241 RS 422 / 485 |
| Interfaces | 1 × RS 422 / 485 (X.27) |
| Connector | 9-pole D-sub socket |
| Supply voltage | 24 V DC rated; 20.4 V to 28.8 V DC permissible |
| Supported protocols | Freeport, ASCII, Modbus RTU master, Modbus RTU device, USS |
| Current consumption, max. | 220 mA; from backplane bus 5 V DC |
| Power loss, typ. | 1.1 W |
| Diagnostics | Diagnostics function; LED for output status |
| Protection | IP20 |
Applications
- Serial communication: Provides RS 422/485 point-to-point communication using Freeport, ASCII, Modbus RTU, or USS.
Key Features
- Communication interface: One RS 422/485 (X.27) interface with a 9-pole D-sub socket.
- Protocol support: Supports Freeport, ASCII, Modbus RTU master, Modbus RTU device, and USS; ASCII and USS are available as library functions.
- Supply voltage: Rated supply voltage: 24 V DC; permissible range: 20.4 V to 28.8 V DC.
- Point-to-point connection: Maximum cable length: 1 000 m.
- Modbus RTU master: Address area: 1 through 49 999; supports up to 247 devices, with a maximum of 32 devices per MODBUS network segment.
- Diagnostics and protection: Diagnostics function and output-status indication LED are available. Degree of protection: IP20.
Frequently Asked Questions
1. What communication interface does the CM 1241 provide?
It provides 1 RS 422/485 (X.27) interface with a 9-pole D-sub socket.
2. Which protocols does this module support?
It supports Freeport, ASCII, Modbus RTU master, Modbus RTU device, and USS. ASCII and USS are available as library functions.
3. What supply voltage does the module require?
The rated supply voltage is 24 V DC, with a permissible range of 20.4 V to 28.8 V DC.
4. What should be verified before requesting a quote?
Verify the required protocol, connector, cable length, supply voltage, and Modbus device configuration for the exact model.
