Siemens 6GK7343-1GX00-0XE0 Profibus DP Interface

Siemens 6GK7343-1GX00-0XE0 is a CP343-1 Advanced communications processor that provides a PROFIBUS DP interface for SIMATIC S7-300 controllers, enabling direct connection of the CPU to PROFIBUS DP field devices. As part of the SIMATIC NET CP family, this module integrates with S7-300 CPUs to handle DP communications, with the GX00 variant listed alongside GX31 in Siemens literature, reflecting the family’s modular approach. The exact model number is 6GK7343-1GX00-0XE0, and related SKUs such as 6GK7343-1GX31-0XE0 exist to extend functionality with PROFINET for Industrial Ethernet networks. In typical automation architectures, it serves to connect a S7-300 PLC to PROFIBUS DP devices—IO blocks, sensors, actuators—on the fieldbus, enabling data exchange across the plant floor and expanding network reach for legacy equipment.