What the NTP support means for your network time sync
The 6GK7443-1EX11-0XE0: The CP 443-1 carries NTP (Network Time Protocol) support, so it can synchronise the S7-400 CPU clock to a network time server — critical for timestamp alignment across distributed controllers, event logging, and coordinated start/stop sequences in a multi-CPU line. It does not support LLDP (Link Layer Discovery Protocol), so topology discovery via network management tools like Siemens PRONETA or third-party LLDP scanners will not work on this interface — plan your asset inventory and network mapping accordingly.
Interface, supply, and physical fit in the S7-400 rack
Single Industrial Ethernet interface at 10/100 Mbit/s via an RJ45 port or AUI (15-pin Sub-D socket for 10 Mbit/s ITP) — the RJ45 handles modern plant-floor connections; the AUI port is legacy for older transceivers or fibre media converters. Powered from the S7-400 backplane at 5 VDC, drawing 1.4 A typical — no external supply needed, but the rack power budget must account for this draw plus the 8.6 W power loss the module dissipates as heat inside the enclosure. Compact single-width format (25 mm wide, 290 mm high, 210 mm deep) — fits one slot in the S7-400 rack; IP20 rated, so it belongs in a sealed cabinet, not on the plant floor.
Active lifecycle and sourcing posture
No stock-holding claim — quoted per RFQ.