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Page 43 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring
2-Wire Reverse Polarity Minute Impulse (59
th
Minute)
AB
PC
YEL / WHT
GRND
AC IN
AC RTN
BLK
BLK
VIO / WHT
To
Other Clocks
24VDC
From
Master Clock
115VAC
Local
Power
O
P
E
N
1
2
3
4
5
6
7
8
Set switches 1-5 of S1 as shown.
Indicates depressed side of switch
H
M
Clock must be set within 20 minutes of actual time
for master to synchronize. Use of a 9Volt alkaline
battery is recommended to avoid resets after power
failures.