The Siemens CP 343-5 (6GK7343-5FA01-0XE0) is a communications processor designed for connecting SIMATIC S7-300 to PROFIBUS networks. It supports FMS, S5-compatible, PG/OP, and S7 communication with a data transfer rate of up to 12 Mbit/s.

Interfaces: 9-pin Sub-D socket (RS485) for PROFIBUS.

Supply Voltage: 24V DC (external), 5V DC (from backplane bus).

Power Consumption: 5W.

Operating Temperature: 0°C to 60°C.

Protection Class: IP20.

Dimensions: 40mm × 125mm × 120mm.

Weight: 0.3 kg.

Mounting: S7-300 rail mounting.

Max Connections: 16 for S7 communication, 48 for multi-protocol mode.