Page 2 - This Class B digital apparatus complies with Canadian ICES-003.; Copyright © 2001 Lathem Time Corporation. All rights reserved.; Lathem Time Corporation
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...
Page 3 - Table of Contents
Table of Contents Introduction..................................................................................................................................................... 1 Clock Operation .........................................................................................................
Page 7 - Introduction
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 show...
Page 8 - About this Manual; * The Lathem SWIFT-485 plus is required for RS485 synchronization.
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...
Page 9 - Optional Accessories
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 VSE005...
Page 11 - Configuring the DDC Series Wall Clock; Setting the DIP Switches - DDC2 / DDC4 Series
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 car...
Page 12 - DIP Switch Settings; Secondary
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 0 1 0 0 0 3-Wire Minute Impulse (59 th Minute) 1 1 0 0 0 3-Wire Minute ...
Page 14 - Battery Installation - DDC2 / DDC4 Series
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...
Page 15 - Secondary Wiring
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. DD...
Page 17 - Digital Display Wall Clock Guide; Mounting to a Wall
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 m...
Page 18 - Mounting to a Single Gang Box
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 mounti...
Page 21 - Figure 4
Page 15 Digital Display Wall Clock Guide Note: The long dimension of the mounting plate must be perpendicular to the ground to assure proper alignment of wall clocks. See page 15, figure 4 for DDC2 details. See page 16, figure 5 for DDC4 details. DDC2 (Double Mount - Wall) » Remove the four phillips...
Page 22 - Figure 5
Digital Display Wall Clock Guide Page 16 DDC4 (Double Mount - Wall) » Remove the two phillips head screws from the left and the right end caps of the two DDC4 clocks and remove. Slide the front panel assemblies out of the cases and set aside. » Place the two DDC4 clocks back to back and secure by in...
Page 23 - Double Mount - Ceiling; Remove the two chase nipples from the mounting plate posts.
Page 17 Digital Display Wall Clock Guide Double Mount - Ceiling Requires optional mounting kit (SAM0626) Tools required for mounting the clock: Flat blade screwdriver Phillips head screwdriver 15/16" open end wrench The double ceiling mount plate attaches to a double or single gang box installed...
Page 24 - Figure 6
Digital Display Wall Clock Guide Page 18 DDC2 (Double Mount - 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 and the right end caps of the two DDC2 clock...
Page 25 - Figure 7
Page 19 Digital Display Wall Clock Guide DDC4 (Double Mount - Ceiling) Note: Make sure you have at least 16" of side clearance on one side in order to remove the front panel assembly. » Remove the two phillips head screws from the left and the right end caps of the two DDC4 clocks and remove. Sl...
Page 26 - Setting the Time; Time Formats; 2 Hour Format; AM
Digital Display Wall Clock Guide Page 20 Setting the Time Time is set on the DDC Series Wall Clocks by depressing buttons located on the left side of the front panel. There are two setting buttons, "H" for hour and "M' for minute. » To advance the hour or minute to the correct time one d...
Page 27 - GRND; Indicates depressed side of switch
Page 21 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring Appendix A - DDC2-RS / 4-RS Secondary Clock Wiring Diagrams Note: See Appendix B for DDC2-RS-24 / DDC4-RS-24 wiring. Stand-Alone (115VAC) GRND AC IN AC RTN BLK BLK Hour and Minutes must be set manually. Use of a 9Volt alkaline battery is re...
Page 28 - Run; From
DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 22 3-Wire Synchronous (115VAC) H M BLU / WHT Run BRN / WHT BLK BLK Correction AC Return 115VAC From Master Clock To Other Clocks 6 7 8 Clock will correct minutes hourly at HH:59 and hour and minutes twice daily at 5:59. Wiring applies to secon...
Page 29 - Correction
Page 23 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring 3-Wire Synchronous (24VAC) 5 6 7 8 OPEN 1 2 3 4 Set switches 1-5 of S1 as shown. Indicates depressed side of switch To Other Clocks Clock will correct minutes hourly at HH:59 and hour and minutes twice daily at 5:59. 24VAC From Master Clock...
Page 31 - Minute With 12 Hour Correction)
Page 25 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring 3-Wire Minute Impulse (59 th Minute With 12 Hour Correction) B C 1 2 3 4 5 6 Clock will correct minutes hourly at HH:58 and hour and minutes twice daily at 5:58. BRN / WHT GRND AC IN AC RTN A VIO / WHT YEL / WHT BLK BLK Wiring applies to se...
Page 32 - Standard Electric Synchronous
DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 26 Standard Electric Synchronous 115VAC From Master Clock To Other Clocks H M BLU / WHT Run Correction BRN / WHT BLK BLK AC Return Clock will correct minutes hourly at HH:59 and hour and minutes twice daily at 5:12. For 24VAC applications, use...
Page 33 - Standard Electric AR-2A 2-Wire Dual Voltage; PC; AB
Page 27 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring Standard Electric AR-2A 2-Wire Dual Voltage PC OPEN 1 2 3 4 5 6 Clock must be set to actual time. Use of a 9Volt alkaline battery is recommended to avoid resets after power failures. 7 8 Set switches 1-5 of S1 as shown. Indicates depressed ...
Page 34 - Standard Electric AR-2 2-Wire Dual Voltage
DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 28 Standard Electric AR-2 2-Wire Dual Voltage PC OPEN 1 2 3 4 5 6 Clock must be set to actual time. Use of a 9Volt alkaline battery is recommended to avoid resets after power failures. 7 8 Set switches 1-5 of S1 as shown. Indicates depressed s...
Page 35 - Synchronous Wired
Page 29 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring Synchronous Wired 115VAC From Master Clock To Other Clocks H M BLU / WHT Run Correction BRN / WHT BLK BLK AC Return 6 7 8 OPEN 1 2 3 4 5 Set switches 1-5 of S1 as shown. Indicates depressed side of switch Clock will correct minutes hourly a...
Page 36 - Minute Dual Motor
DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 30 Simplex 59 th Minute Dual Motor 115VAC From Master Clock To Other Clocks H M BLU / WHT Run Correction BRN / WHT BLK BLK AC Return Clock must be set to proper hour. Clock will correct minutes hourly at HH:58. . Use of a 9Volt alkaline batter...
Page 38 - Edwards Dual Motor
DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 32 Edwards Dual Motor 115VAC From Master Clock To Other Clocks H M BLU / WHT Run Correction BRN / WHT BLK BLK AC Return Clock must be set to actual time. Use of a 9Volt alkaline battery is recommended to avoid resets after power failures. For ...
Page 39 - Standard Electric AR-3 3-Wire Minute Impulse; Common
Page 33 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring Standard Electric AR-3 3-Wire Minute Impulse To Other Clocks 24VDC / 48VDC From Master Clock BRN/ WHT 24 VDC Pulse Common YEL / WHT 48 VDC Correction GRND AC IN AC RTN BLK BLK VIO / WHT H M 115VAC Local Power Clock must be set to actual tim...
Page 40 - National Synchronous Wired
DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 34 National Synchronous Wired 115VAC From Master Clock To Other Clocks H M BLU / WHT Run Correction BRN / WHT BLK BLK AC Return Clock will correct minutes hourly at HH:00 and hour and minutes twice daily at 6:00. For 24VAC applications, use wi...
Page 41 - Stromberg Synchronous Wired (56
Page 35 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring Stromberg Synchronous Wired (56 th Minute) To Other Clocks H M BLU / WHT Run Correction BRN / WHT BLK BLK AC Return 115VAC From Master Clock Clock will correct minutes hourly at HH:56 and hour and minutes twice daily at 11:56. For 24VAC app...
Page 42 - Cincinnati D1; COMMON
DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 36 Cincinnati D1 COMMON 1 2 3 4 5 Clock must be set within 20 minutes of actual time for master to synchronize. Use of a 9Volt alkaline battery is recommended to avoid resets after power failures. OPEN 6 7 8 Set switches 1-5 of S1 as shown. In...
Page 45 - Electronic Coded; WHT; BLK; Local
Page 39 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring Electronic Coded WHT Reciever 1 2 3 4 5 6 Clock will correct minutes hourly at HH:57 and hour and minutes twice daily at 5:57. Requires 3510Hz receiver (not supplied) Set switches 1-5 of S1 as shown. Indicates depressed side of switch OPEN ...
Page 46 - Straight Frequency
DDC2 / 4-RS Wiring Digital Display Wall Clock Guide Page 40 Straight Frequency WHT Reciever 1 2 3 4 5 6 Clock will correct minutes hourly at HH:57 and hour and minutes twice daily at 5:57. Requires 3510Hz receiver (not supplied) Set switches 1-5 of S1 as shown. Indicates depressed side of switch OPE...
Page 49 - -Wire Reverse Polarity Minute Impulse (59
Page 43 Digital Display Wall Clock Guide DDC2 / 4-RS Wiring 2-Wire Reverse Polarity Minute Impulse (59 th Minute) AB PC YEL / WHT GRND AC IN AC RTN BLK BLK VIO / WHT H M 24VDC From Master Clock 115VAC Local Power To Other Clocks Clock must be set within 20 minutes of actual time for master to synchr...
Page 52 - Appendix C - RS485 Wiring Diagrams; byte; party may create such a utility.
DDC2 / 4-RS -485 Wiring Digital Display Wall Clock Guide Page 46 Appendix C - RS485 Wiring Diagrams RS485 Data Format The data string that sends the time to the DDC2 / DDC4 Series Wall Clocks is formatted in such a manner that a utility can be written to achieve time updates from a personal computer...
Page 53 - Pin Signal; Signal Ground; OMC II
Page 47 Digital Display Wall Clock Guide DDC2 / 4-RS -485 Wiring OMCII to DDC2-RS / 4-RS Pin Signal Signal JP4 Connection 1 Transmit Data (-) Transmit Data (-) D- 2 Transmit Data (+) Transmit Data (+) D+ 8 Signal Ground Signal Ground GND To Other Clocks BLK BLK 115VAC Local Power OMCII DB9 Female Pl...
Page 54 - Wire Signal; Gray
DDC2 / 4-RS -485 Wiring Digital Display Wall Clock Guide Page 48 LTR0 to DDC2-RS / 4-RS Wire Signal Signal JP4 Connection Gray Transmit Data (-) Transmit Data (-) D- Orange Transmit Data (+) Transmit Data (+) D+ Black Signal Ground Signal Ground GND 1 2 3 4 5 6 7 BLK BLK 115VAC Local Power To Other ...
Page 55 - Signal
Page 49 Digital Display Wall Clock Guide DDC2 / 4-RS -485 Wiring LTR4 / 8-512 to DDC2-RS / 4-RS Terminal # Signal Signal JP4 Connection 9 (D-) Transmit Data (-) Transmit Data (-) D- 8 (D+) Transmit Data (+) Transmit Data (+) D+ BLK BLK LTR4 / 8-512 Terminal Connections Cable should be RS232 twisted ...
Page 56 - Wiring
DDC-TC Timer Control Panel Digital Display Wall Clock Guide Page 50 Appendix D - DDC-TC Timer Control Panel Wiring The DDC-TC can be connected to the DDC Series Wall Clock with a 6 conductor CAT3 or CAT5 network cable. The DDC-TC can be mounted up to 200 feet from the DDC Series Wall Clock. The DDC-...
Page 57 - Installation
Page 51 Digital Display Wall Clock Guide DDC-TC Timer Control Panel Installation The DDC-TC mounts directly to a standard, double-gang wall box. (not included) Once the wiring has been attached, place the wires inside the double-gang wall box and mount the DDC-TC to the box with the four screws supp...
Page 58 - Count Up; As a Count Down Timer; Count Down
DDC-TC Timer Control Panel Digital Display Wall Clock Guide Page 52 Operation As a Count Up Timer To start the count: press Count Up To pause the count: press Stop / Continue To continue the count: press Stop / Continue To return to clock mode: press Quit As a Count Down Timer To set hours: press Se...
Page 59 - Appendix E - LTR-GPS Satellite Receiver / Clock Synchronizer
Page 53 Digital Display Wall Clock Guide Specifications Appendix E - LTR-GPS Satellite Receiver / Clock Synchronizer Lathem’s LTR-GPS is a Global Positioning Satellite receiver using 12-channels to access the accurate date and time signal transmitted each second by 24 satellites in geosynchronous or...
Page 61 - Connecting to a Lathem DDC2-RS or DDC4-RS Digital Clock
Page 55 Digital Display Wall Clock Guide Specifications Connecting to a Lathem DDC2-RS or DDC4-RS Digital Clock D DC2 -RS / D DC 4 -RS
Page 62 - Appendix F - Specifications
Warranty Digital Display Wall Clock Guide Page 56 Appendix F - Specifications Dimensions DDC2 4 7/8" H X 10 1/4" W X 3 1/8" D 12.4 cm H X 26.2 cm W X 7.9 cm D DDC4 6 3/4" H X 15 1/2" W X 3 1/8" D 17.1 cm H X 39 cm W X 7.9 cm D Weight DDC2 3.2 lbs (1.451 kg) DDC4 9 lbs. (4.086...
Page 63 - Appendix G - Warranty; Limited One-Year Limited Warranty
Page 57 Digital Display Wall Clock Guide Specifications Appendix G - Warranty Limited One-Year Limited Warranty Lathem warrants the hardware products described in this guide against defects in material and workmanship for a period of one year from date of original purchase from Lathem or from an aut...
