The Siemens CP 343-2 (6GK7343-2AH01-0XA0) is a communications processor designed for connecting SIMATIC S7-300 and ET 200M to AS-Interface networks. It complies with AS-Interface Specification V3.0 and supports up to 62 AS-i slaves.

Interfaces: AS-Interface Master with S7-300 front connector (20-pin).

Supply Voltage: Backplane bus.

Power Consumption: 4W.

Operating Temperature: 0°C to 60°C.

Protection Class: IP20.

Dimensions: 40mm × 125mm × 120mm.

Mounting: S7-300 rail mounting.

Max AS-i Slaves: 62.

Bus Cycle Time: 5ms (31 slaves), 10ms (62 slaves).

Redundancy Capability: Yes (with redundant IM153).

Diagnostics: LED indicators (RUN, APF, CER, AUP, CM, SF).