Lathem DDC2 - Manual (Page 47)

Page 41 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring
3-Wire Minute Impulse (58
th
Minute)
B
R
N
/
W
H
T
GRND
AC IN
AC RTN
A
B
C
V
IO
/
W
H
T
Y
E
L
/
W
H
T
B
L
K
B
L
K
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.