
Page 25 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring
3-Wire Minute Impulse (59
th
Minute With 12 Hour Correction)
BRN / WHT
GRND
A
B
C
VIO / WHT
YEL / WHT
BLK
BLK
Wiring applies to secondary wall clocks such as:
Lathem ISC 3-Wire 12Hour Simplex 91, 941
Set switches 1-5 of S1 as shown.
Indicates depressed side of switch
To
Other Clocks
24VDC
From
115VAC
Local
H
M
Clock will correct minutes hourly at HH:58 and
hour and minutes twice daily at 5:58.
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