S7-400:
Siemens S7-400H system including products as S7 414-4H CPU with CP443-1, S7 315-2DP CPU with CP343-5, S7 CPU 224 with EM277 (OEM cooling machine), SCALANCE X202-2 X204-2 (redundant ring Ethernet net), ET 200M distribute I/O (Y-Link contact with converter), WinCC version 6.0 Asia and SIMATIC IPC with redundant CP1613 is applied in the Equipment Monitor and Control System (EMCS) of Beijing Subway Line 5 air conditioning system. It meets customers