211SENTRON PAC5100/5200, 7KM5212/5412, Device Manual
E50417-H1040-C568-A1, Edition 03.2015
9 Time Synchronization
9.1 General 212
9.2 Internal Time Keeping 212
9.3 External Time Synchronization per NTP 213
9.4 External Time Synchronization via Fieldbus 214
9.5 Internal Time Synchronization via RTC 214