Lathem DDC2 - Manual (Page 28)

DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 22
3-Wire Synchronous (115VAC)
OPEN
1 2 3 4 5 6 7 8
Set switches 1-5 of S1 as shown.
Indicates depressed side of switch
Wiring applies to secondary wall clocks such as:
Lathem type SS Cincinnati D10 IBM 77 Series
Simplex 77 Series, 93-9, 91-9, 941-9, 943-9
Stromberg 3000
To
Other Clocks
115VAC
From
Master Clock
H
M
B
L
U
/
W
H
T
Run
Correction
B
R
N
/
W
H
T
B
L
K
B
L
K
AC Return
Clock will correct minutes hourly at HH:59 and
hour and minutes twice daily at 5:59.