Siemens 6GK7443-1GX20-0XE0 Communications Processor

Siemens 6GK7443-1GX20-0XE0 Communications Processor, CP 443-1 Advanced, is an industrial Ethernet interface module that links a SIMATIC S7-400 CPU to Industrial Ethernet networks. It functions as a PROFINET IO Controller with RT and IRT, supports MRP and PROFINET CBA, and provides TCP/IP, ISO, UDP, S7 communication, and S5 compatibility for broader interoperability. The GX20 variant offers a PROFINET interface with four RJ45 ports at 10/100 Mbps and a single Gigabit RJ45 port at 10/100/1000 Mbps for high-speed network access. Additional features include IP configuration via DHCP or fixed addressing, IP access control lists, and time-of-day synchronization, with extended web diagnostics and Fast Startup. The module also supports SNMP, DHCP client/server, and storage options via the C‑plug memory, enabling configuration persistence across reboots. Designed for integrating S7-400 CPUs into complex Industrial Ethernet deployments, CP 443-1 Advanced combines multiple Ethernet interfaces with Profinet control and S7 routing to enable reliable, standards-based communication between PLCs, HMIs, and other networked devices.