Siemens AG 6GK7-343-1EX11-0XE0 Ethernet Module

Siemens CP 343-1 Advanced for Industrial Ethernet (6GK7 343-1EX11-0XE0) is a plug-in communications processor for SIMATIC S7-300 that adds native Ethernet connectivity to the controller. It enables Industrial Ethernet communication via ISO/TCP (RFC1006) and supports PROFINET IO as either a controller or a device, making it suitable for integrating S7-300 into PROFINET IO networks. The module includes an integrated ERTEC 200 2-port switch, providing two RJ45 Ethernet ports at 10/100 Mbit/s for external network access and device-to-device connections on the same module. In addition to data exchange, it handles S7 communication, fetch/write operations, and multicast support, and it offers DHCP capabilities, CPU synchronization, diagnostics, and LAN-based initialization to simplify setup and monitoring. This CP 343-1 variant is designed to extend legacy S7-300 installations with modern Industrial Ethernet and PROFINET connectivity, enabling scalable, modular networked automation configurations.