Replacing an existing ddc4 wall clock, Board layout diagram – Lathem DDC2 User Manual
Page 16
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Digital Display Wall Clock Guide
Page 10
Replacing an Existing DDC4 Wall Clock
When replacing an older style DDC4 Wall Clock it will be necessary to remove any connectors used by the
older style clock and attach the wires to the new DDC Series Wall Clock as described above.
Board Layout Diagram
J2
Factory Default
Off
J2
Install shunt on
last clock for RS485 connections
Figure 2
JP2
Hours
Minutes
Up
Down
J4
J3
J1
OPEN
1
2
3
4
5
6
7
8
DIP Switch
S1
9VDC Alkaline Battery
Cradle
-
+
Lathem Time Corp.
DDC2\4 (E-PROM)
Jumper
J2
Ground
Beeper
D-
D+
JP4
JP1
JP3
Fly Lead
Connector
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