Lathem DDC2 - Manual (Page 49)

Page 43 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring
2-Wire Reverse Polarity Minute Impulse (59
th
Minute)
AB
PC
Y
E
L
/
W
H
T
GRND
AC IN
AC RTN
B
L
K
B
L
K
V
IO
/
W
H
T
To
Other Clocks
24VDC
From
Master Clock
115VAC
Local
Power
OPEN
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.