Siemens RS485 Communication Module SIMATIC S7-1200 CB 1241 6ES72411CH301XB0

Siemens Communication Board maximum flexibility for serial communication

The CB 1241 RS485 is a Communication Board for SIMATIC S7-1200 PLCs designed to extend the communication capabilities of the CPU. With support for major industrial protocols such as Modbus RTU (master and slave), USS, Freeport, and 3964(R), it offers broad versatility in managing serial devices and integrating heterogeneous systems.

Robust, long-range connectivity

Point-to-point communication over RS485 interface enables stable connection up to 1000 meters cable length, with support for up to 32 devices per network segment, expandable via repeaters. A perfect solution for distributed automation in industrial or plant engineering.

High performance and integrated diagnostics

The board offers comprehensive diagnostics, reporting any anomalies or malfunctions. With telegram length up to 1 kB and wide configurability of communication parameters (bits per character, stop bits, parity), it ensures reliable performance even in complex environments.

Suitable for harsh environmental conditions

Designed to withstand demanding environmental conditions, the CB 1241 operates properly in a temperature range of -20 °C to +60 °C (up to +50 °C vertically) and tolerates humidity up to 95 percent without condensation. All this in a compact and robust format with IP20 protection.

Certifications and compliance

The product complies with major international standards and has the following certifications: CE, UL, CSA, cULus, FM, KC, RCM and Marine Approval, making it suitable for use even in naval applications or regulated environments.

Technical Specifications Siemens Communication Module