Technical data

Planning time synchronization
4.2 Selecting the central plant clock
Time synchronization (V7.1)
46 Function Manual, 03/2009, A5E01216578-01
4.2 Selecting the central plant clock
Introduction
You should always synchronize all automation processes using a standard time. In the case
of PCS 7 plants, we recommend performing synchronization by means of a central plant
clock. The central plant clock controls the time for the entire PCS 7 plant, and synchronizes
all other plant components via their interfaces.
A GPS or DCF 77 signal should be used as the time source for the central plant clock.
Selecting the central plant clock
The following table shows which central plant clocks are offered by the SICLOCK system:
Central plant clock Ethernet Inputs Outputs GPS
decoders
DCF 77
receivers
SICLOCK TC 400 4x RJ45 or ITP 2 x digital 2x digital 24V
1x digital RS422/5V
1 x alarm
1x warning
GPS1000 (GPSDEC) DCFRS industry
version
SICLOCK TM RJ45 or ITP 2 x digital 8 x digital GPS1000 (GPSDEC) DCFRS industry
version
SICLOCK TS RJ45 or ITP 1 x IRIG A+B
1 x digital
1 x IRIG A+B
3 x digital
GPS1000 DCFRS industry
version