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

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DDC2 / 4-RS -24 Wiring

Digital Display Wall Clock Guide

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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
					JP3

Figure 7

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Contents Installation & Users Guide Lathem Time Corporation Table of Contents Page Page Page Introduction Clock OperationAbout this Manual Optional Accessories DDC-TCPage Configuring the DDC Series Wall Clock Setting the DIP Switches DDC2 / DDC4 SeriesDIP Switch Settings DDC2/4-RS / DDC2/4-RS-24 Configuring RS485 Communications DDC2/4-RS SeriesBattery Usage DDC2 / DDC4 Series Battery Installation DDC2 / DDC4 Series Power Cord Installation DDC2/4-RSRS485 Wiring Wiring Installation DDC2/4-RS SeriesSecondary Wiring DDC-TC WiringBoard Layout Diagram Replacing an Existing DDC4 Wall ClockMounting DDC2 / DDC4 Series Mounting to a WallMounting to a Single Gang Box DDC2 Double Mount Wall DDC2 Double Mount Wall DDC4 Double Mount Wall Double Mount Ceiling DDC2 Double Mount Ceiling DDC4 Double Mount Ceiling Setting the Time Time FormatsBLK Appendix a DDC2-RS / 4-RS Secondary Clock Wiring DiagramsGrnd Stand-Alone 115VACWire Synchronous 115VAC BRN / WHT BLU / WHTAC RTN Wire Synchronous 24VACGrnd BLK BLUWire minute Impulse 59th Minute YEL / WHT VIO / WHT BRN / WHTWire Minute Impulse 59th Minute With 12 Hour Correction BLK YEL / WHT VIO / WHT BRN / WHTStandard Electric Synchronous Standard Electric AR-2A 2-Wire Dual Voltage BLK YELStandard Electric AR-2 2-Wire Dual Voltage Synchronous Wired Simplex 59th Minute Dual Motor Simplex 45th Minute Dual Motor Edwards Dual Motor Standard Electric AR-3 3-Wire Minute Impulse BLK YEL / WHT VIO / WHT BRN/ WHTNational Synchronous Wired Stromberg Synchronous Wired 56th Minute Common Cincinnati D1BLK VIO / WHT YEL / WHT Cincinnati D6, EdwardsWire Pulse Alternating 24VDC VIO / WHT YEL / WHTGrnd AC RTN BLK BLU Electronic CodedStraight Frequency Wire Minute Impulse 58th Minute Wire Minute Impulse 44th Minute Wire Reverse Polarity Minute Impulse 59th Minute Appendix B DDC2-RS-24 / DDC4-RS-24 Wiring DDC2-RS-24 / DDC4-RS-24 Wiring BLK BRN / WHT BLU / WHTAppendix C RS485 Wiring Diagrams RS485 Data FormatOmcii to DDC2-RS / 4-RS OMCGND BLK H LTR0 to DDC2-RS / 4-RSTerminal # Signal JP4 Connection LTR4 / 8-512 to DDC2-RS / 4-RSAppendix D DDC-TC Timer Control Panel WiringInstallation Timer ControlOperation As a Count Up Timer As a Count Down TimerAppendix E LTR-GPS Satellite Receiver / Clock Synchronizer DWA-SPage Connecting to a Lathem DDC2-RS or DDC4-RS Digital Clock Appendix F Specifications DDC2 / DDC4Appendix G Warranty Limited One-Year Limited Warranty

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