Siemens SICLOCK TC100 Operating Instructions Manual page 36

6.3 Connecting external synchronization
The signal from the connected radio clock is automatically detected, and dis-
played in the parameter /Inputs/Input 1/Status (0.20.02).
Figure 6-2 Circuit diagrams for a passive and an active radio clock
Table 6-1
Terminal
X2-1
X2-2
X2-3
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SICLOCK TC100 Operating Instructions
Terminal assignment of radio clock inputs
RADIO CLOCK GND
RADIO CLOCK 1A
RADIO CLOCK 1B
Description
Connection
6-3