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Digital Display Wall Clock
DDC2 / DDC4 Series
Installation &
User's Guide
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OMNI:CHRON, mini:master, Lathem and the Lathem logo are registered trademarks of Lathem Time Corporation. Other product names mentioned in this manual may be trademarks of their respective companies and are hereby acknowledged. WARNING: Changes or modifications to this product not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the followi
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Table of Contents Introduction..................................................................................................................................................... 1 Clock Operation.............................................................................................................................................. 1 About this Manual .......................................................................................................................................
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DDC4 (Double Mount - Ceiling) .......................................................................................................... 19 Setting the Time............................................................................................................................................ 20 Time Formats............................................................................................................................................ 20 12 Hour Format........................
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As a Count Up Timer............................................................................................................................ 52 As a Count Down Timer ....................................................................................................................... 52 Appendix E - LTR-GPS Satellite Receiver / Clock Synchronizer................................................................ 53 Connecting to a Lathem DDC2-RS or DDC4-RS Digital Clock .....................
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Page 1 Digital Display Wall Clock Guide Introduction The Digital Display Series Wall Clocks are designed with 2-inch or 4-inch red LED displays that can be viewed from great distances; the 4-inch model as far away as 100 feet, the 2-inch model from as far away as 50 feet. The bright red display shows the hour and minutes and can be configured for a 12 or 24 hour format. By the setting of internal DIP switches, the DDC Series Wall Clocks can be configured to run as "stand-alone" or to re
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Digital Display Wall Clock Guide Page 2 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
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Page 3 Digital Display Wall Clock Guide Optional Accessories VSE0050 Power Cord, 6 feet. DDC Series Wall Clocks are shipped without power cords. SAM0626 Double Ceiling Mount Kit for DDC2 or DDC4 Series SAM0630 Double Wall Mount Kit for DDC2 Series SAM0625 Double Wall Mount Kit for DDC4 Series VSE0052 Mounting Bracket for 3510 Hz Electronic Receiver. (DDC4 only, installer must use optional method to mount Receiver outside the DDC2 if Receiver is used) (Receiver not included) DDC-TC
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Digital Display Wall Clock Guide Page 4 SAM0626 Kit (left) Includes: 1 - Mounting Plate Assembly 2 - Chase Nipples 4 - #10 Screws 8 - #10 Lock Washers 8 - #10 Hex Nuts SAM0630 Kit (middle) Includes: 1 - Mounting Plate Assembly 2 - Modified End Caps 2 - Chase Nipples 4 - #10 Screws 8 - #10 Lock Washers 4 - #10 Hex Nuts SAM0625 Kit (right) Includes: 1 - Mounting Plate Assembly 2 - Modified End Caps 1 - End Cap Support 2 - Chase Nipples 4 - #10 Screws 8 - #10 Lock Washers 4 -
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Page 5 Digital Display Wall Clock Guide Configuring the DDC Series Wall Clock Setting the DIP Switches - 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 switch S1near the center of the circuit board and set the DIP switches (See figure1belo
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Digital Display Wall Clock Guide Page 6 DIP Switch Settings Table 1 - S1 (1-5) Secondary Clock Correction 1 2 3 4 5 Secondary Clock Selection 0=Closed 1=Open *=Factory Default 0 0 0 0 0 Stand Alone * 1 0 0 0 0 3-Wire Synchronous th 0 1 0 0 0 3-Wire Minute Impulse (59 Minute) th 1 1 0 0 0 3-Wire Minute Impulse (59 Minute) With 12 Hour Correction 0 0 1 0 0 Standard Electric Synchronous 1 0 1 0 0 Standard Electric AR-2A - 2-Wire Dual Voltage 0 1 1 0 0 Standard Electric AR-2 -
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Page 7 Digital Display Wall Clock Guide Configuring RS485 Communications - DDC2/4-RS Series When multiple DDC2 (4)-RS Series Wall Clocks are installed as slave units to either the Lathem LTR4- 512 or LTR8-512 Master, LTR0 Mini-Master, Terminal Manager Software or the OMNI:CHRON Time Clock, the last clock on the line must have a shunt installed over both pins at position J2 (see figure 2, page 9). When shipped, the shunt is placed over only one pin of position J2 in an "open" setting. It is
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Digital Display Wall Clock Guide Page 8 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
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Page 9 Digital Display Wall Clock Guide AC Return) Attach the ground wire of the cord (normally green) to the green ground screw located on the inside back of the case. Slide the lens and circuit board assembly back into the case, replace the end cap and secure with the four phillips head screws. DDC4-RS 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
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Digital Display Wall Clock Guide Page 10 Replacing an Existing DDC4 Wall Clock When replacing an older style DDC4 Wall Clock it will be necessary to remove any connectors used by the older style clock and attach the wires to the new DDC Series Wall Clock as described above. Board Layout Diagram Fly Lead Jumper Connector 9VDC Alkaline Battery J2 DIP Switch J1 Cradle S1 Hours - + 1 2 3 4 5 6 7 8 Minutes Up OPEN Down JP2 Ground Lathem Time Corp. DDC2\4 (E
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Page 11 Digital Display Wall Clock Guide Mounting - DDC2 / DDC4 Series The DDC Series Wall Clocks can be mounted directly to a wall, to a single gang outlet box, double hung from the wall or double hung from the ceiling. When deciding where the clock will be mounted, keep in mind that 115VAC power may be required depending on the installation type. See page 14, figure 3. Mounting to a Wall Tools required for mounting the clock: Drill with a 5/16" bit Hammer Phillips head screwdri
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Digital Display Wall Clock Guide Page 12 » Slide the lens and circuit board assembly back into the case, replace the end cap and secure with the four phillips head screws. DDC4 » After deciding the location where the clock will be mounted, make two marks 12" apart and horizontal. Note: If mounting near a ceiling, make sure the holes are at least 2 1/4" away from the ceiling. Note: Make sure you have at least 16" of side clearance on one side in order to remove the front panel. »
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Page 13 Digital Display Wall Clock Guide DDC2 Note: If mounting near a ceiling, make sure the top of the single gang box is at least 2 1/4" away from the ceiling. Note: Make sure you have at least 10 1/2" of side clearance on one side in order to remove the lens and circuit board assembly. » 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 and set aside. » Remove the desired vent cap that any
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Digital Display Wall Clock Guide Page 14 » Slide the front panel display back into the case, replace the end cap and secure with the two phillips head screws. Vent holes For single For 1/2" gang box conduit mount Keyholes for wall mount Figure 3 Double Mount - Wall DDC2 Requires optional mounting kit (SAM0630) DDC4 Requires optional mounting kit (SAM0625) Tools required for mounting the clock: Flat blade screwdriver Phillips head screwdriver 15/16" open end wrenc
