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.

Hours

Minutes

Up

Down

Ground

Beeper

D-

D+

J4

J3

Fly Lead
Connector Jumper
J1	J2	DIP Switch
				S1
	1	2	3	4	5	6	7	8
				OPEN

JP2

Lathem Time Corp.

DDC2\4(E-PROM)

JP4

JP1

9VDC Alkaline Battery

Cradle

-+

JP3

Figure 7