Lathem manual Appendix B DDC2-RS-24 / DDC4-RS-24 Wiring

DDC2 / 4-RS -24 Wiring Digital Display Wall Clock Guide Page 44

Appendix B - DDC2-RS-24 / DDC4-RS-24 Wiring

The DDC2-RS-24 and the DDC4-RS-24 allow for 24VAC supplied from the Master Clock or Power Supply to power it for normal operation. These models can be used in installations where local 115VAC power may not be available. When shipped, the DDC2-RS-24 and DDC4-RS-24 have an optional power transformer that allows for 24VAC operation.

The 24VAC power from the Master Clock or Power Supply should be connected to the two black wires leading from J1. (See figure 7 below for location of J1)

Correction wiring should be applied according to the secondary type selection as shown in Appendix A.

CAUTION: Applying any voltage higher than 24VAC to the input (two black leads from J1) WILL cause damage to the DDC2-RS-24 and DDC4-RS-24 clocks.

Fly Lead

Connector Jumper

J1 J2

Hours

Minutes

Up

Down JP2

DIP Switch

S1

1 2 3 4 5 6 7 8

OPEN

9VDC Alkaline Battery

Cradle

-+

Ground

Beeper JP4

D-

D+

J4 JP1

J3

Lathem Time Corp.
DDC2\4	(E-PROM)	JP3

Figure 7