Siemens 6GK1543-1AA01 Sinec Communication Module

Siemens 6GK1543-1AA01 is a SINEC CP5431 L2 communication processor that enables SIMATIC S5 PLCs to connect to PROFIBUS DP networks using FMS/DP protocols. It is designed for S5 models 115U/H, 135U, and 155U/H and provides a 9‑pin RS‑232/423 serial port, a SINEC L2 interface port (15‑pin), and a fiber optic bus port for connecting to an optical bus segment. This is a single‑wide CP delivered without the 15V memory submodule, with the memory submodule purchased separately. The CP5431 FMS/DP functionality supports reliable data exchange between the S5 and DP devices, facilitating integration of legacy automation assets into modern PROFIBUS networks.