Lathem DDC2 manual About this Manual

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Digital Display Wall Clock Guide

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About this Manual

This manual will guide you through the installation, setup and wiring of your DDC Series Wall Clock. This manual covers the four available DDC Series models. The available models and their descriptions are:

DDC2-RS / DDC4-RS Equipped with a 2-inch or 4-inch display, these models can operate as a stand- alone, a secondary clock to virtually any master controlled system or can be synchronized with the RS485 signal from the Lathem LTR4-512 or LTR8-512 Master, LTR0 mini:master, Terminal Manager Software* or the OMNI:CHRON Time Clock.

DDC2-RS-24 / DDC4-RS-24 Same as above, models with the "-24" suffix have an optional power transformer that allows for 24VAC operation. These models are designed to be powered from an external, 24VAC-power supply for use in installations where local 115VAC power may not available.

* The Lathem SWIFT-485 plus is required for RS485 synchronization.

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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-RSWiring Installation DDC2/4-RS Series Secondary WiringRS485 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 FormatsStand-Alone 115VAC Appendix a DDC2-RS / 4-RS Secondary Clock Wiring DiagramsBLK Wire Synchronous 115VAC WHTWire Synchronous 24VAC Correction GrndAC RTN BLK BRN / WHT BLU / WHTYEL / WHT VIO / WHT BRN / WHT Wire minute Impulse 59th MinuteGrnd BLK Wire 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 D1VIO Cincinnati D6, EdwardsWire Pulse Alternating 24VDC Grnd AC RTN BLK VIO / WHT YEL / WHTGrnd AC in AC RTN BLK BLU Electronic CodedGrnd AC AC RTN BLK BLU Straight FrequencyWire Minute Impulse 58th Minute Wire Minute Impulse 44th Minute Wire Reverse Polarity Minute Impulse 59th Minute VIO / WHT YEL / WHTAppendix B DDC2-RS-24 / DDC4-RS-24 Wiring DDC2-RS-24 / DDC4-RS-24 Wiring Appendix C RS485 Wiring Diagrams RS485 Data FormatOMC GNDJP4 Omcii to DDC2-RS / 4-RSBLK H LTR0 to DDC2-RS / 4-RS+ of JP4 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 LTR-0Page 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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