Lathem manual Battery Installation DDC2 / DDC4 Series, Power Cord Installation DDC2/4-RS

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Digital Display Wall Clock Guide

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When used as a RS485 clock, the master clock will send a signal to the wall clock every minute. The 9- Volt alkaline battery (not included) is optional in these types of installations.

Battery Installation - DDC2 / DDC4 Series

DDC2

Remove the four phillips head screws from the left or the right end cap and remove. Slide the lens and circuit board assembly out of the case. Place the lens aside and carefully flip the circuit board assembly over and lay it face down on a clean, smooth work surface. Locate the Battery Cradle on the upper right corner of the circuit board assembly. (See figure 2, page 9) Slide the battery into the cradle making sure the Positive and Negative connections of the battery and cradle match. Snap the battery onto the connections located inside the battery cradle. Slide the lens and circuit board assembly back into the case, replace the end cap and secure with the four phillips head screws.

DDC4

Remove the two phillips head screws from the left or the right end cap and remove. Slide the front panel assembly out of the case. Carefully flip the front panel assembly over and lay it face down on a clean, smooth work surface. Locate the Battery Cradle on the upper right corner of the circuit board assembly. (See figure 2, page 9) Slide the battery into the cradle making sure the Positive and Negative connections of the battery and cradle match. Snap the battery onto the connections located inside the battery cradle. Slide the front panel display back into the case, replace the end cap and secure with the two phillips head screws.

Power Cord Installation - DDC2/4-RS

Note: This section refers only to the 115VAC models. Applying power other than 24VAC to models DDC2- RS-24 or DDC4-RS-24 WILL CAUSE DAMAGE and void the warranty. See Appendix B for proper wiring of these models.

DDC2-RS

Remove the four phillips head screws from the left or the right end cap and remove. Slide the lens and circuit board assembly out of the case. Place the lens aside and carefully flip the circuit board assembly over and lay it face down on a clean, smooth work surface. Remove one of the vent caps from the case of the wall clock and route the power cord through it to the back of the circuit board assembly. (If the power cord will be routed through the back-of-the-clock conduit access, route the cord through the gang box and conduit access hole to the back of the circuit board assembly). Strip away 1/2" of the protective shield from each wire of the power cord. Locate the two black wires leading from J1 (see figure 2, page 9) and attach the AC In line of the cord to one and the AC Return line to the other. (normally black is AC In and white is

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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 FormatsStand-Alone 115VAC Appendix a DDC2-RS / 4-RS Secondary Clock Wiring DiagramsBLK Wire Synchronous 115VAC WHTAC RTN Wire Synchronous 24VAC CorrectionGrnd 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 FormatJP4 OMCGND 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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