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DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 38
2-Wire Pulse Alternating (24VDC)
OPE
N
1
2
3 4 5
6
7
8
Set switches 1-5 of S1 as shown.
Indicates depressed side of switch
A
B
YEL / WHT
GRND
AC IN
AC RTN
BLK
BLK
VIO / WHT
To
Other Clocks
24VDC
From
Master Clock
115VAC
Local
Pow
er
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.