Communication Board RS-485

The Siemens 6ES7241-1CH30-1XB0 is a compact Communication Board (CB 1241) designed for the SIMATIC S7-1200 controller. It features an RS-485 interface with a screw-type terminal block and supports point-to-point and multipoint serial communication.

• Protocols Supported: Freeport, 3964(R), Modbus RTU (master and slave), and USS (available as a library function)

• Maximum Cable Length: 1000 meters

• Maximum Telegram Length: 1 kbyte (Freeport, 3964(R))

• Address Range: Modbus RTU addressing from 1 to 49,999

• Power Supply: 5 V DC from backplane bus, typical current 50 mA, typical power loss 1.5 W

• Protection Class: IP20

• Operating Temperature: -20°C to +60°C (horizontal), -20°C to +50°C (vertical)

• Humidity: Up to 95% (non-condensing)

• Dimensions: 38 x 62 x 21 mm

• Weight: Approx. 40 g

• Diagnostics: LED status indication and diagnostic functions