Siemens 6GK7543-1AX10-0XE0 Communication Processor. Siemens 6GK7543-1AX10-0XE0 is the exact manufacturer order number for a communication processor in the SIMATIC NET Industrial Communication portfolio. Siemens describes this exact reference as: communications processor CP 1543-1 for connection of SIMATIC S7-1500 to Industrial Ethernet; TCP/IP, ISO, UDP, S7 communication, IP broadcast/ multicast, security (VPN, firewall), diagnostics, SNMPv1/v3, DHCP, FTP client/server, email, IPv4/IPv6, IEEE 802.1X (radius), time synchronization via NTP, 1x RJ45 (10/100/1000 Mbps). The verified manufacturer lifecycle record is PM300: Active Product.