Lathem LTR Series Master Clock
Lathem LTR Master Clock

Master clocks for schools. LTR4-12 Master Clocks can be programmed via keypad or available MasterLink software. Made in USA by Lathem Time Clock Company in Atlanta, Georgia

Our Price: $895.00
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Lathem LTR

Select your LTR4 or LTR8 here

Accessories & Supplies:

DetailsIDProduct NameDescriptionPriceAdd To Cart
Click 1   $0.00
Click 2 Lathem Analog child clockSS12xxx Arabic wall Clock$162.00
Click 752 Lathem Low Voltage Power SupplyLTR512 PS8-24$265.00
Click 6 Lathem PS8-24B2 - 2 WireLathem 2 wire power booster$325.00
Click 8 Lathem PS8-24B3 - 3 wireLathem 3 wire power booster$325.00
Click 3 Lathem Masterlink Software for LTR8 Series onlyMasterLink MLINK software$295.00


LTR512-4: 1 clock circuit, 3 signal circuits

LTR512-8: 2 clock circuits, 7 signal circuits

  • Control up to 17 digital, or 20-28 analog clocks.  Power boosters are available.
  • Eight 64 event schedules can be activativated individually, or in groups, allowing for up to 512 active events.  Each event (ring) can be set to a different duration (like 1 second for a 2 minute warning "lunch ending", then 3 seconds for class change or "get back to work."
  • Special schedules for holidays and automiatic schedule changes programmed in advance of their activation dates*.
       * Requries MasterLink software; a demo CD is included.
  • Automatic Daylight Savings Time adjustments, supporting international requirements.
  • One Year Warranty
  • Keypad and text/menu display allows convenient programming changes to schedules.
  • Dual password level grant appropriate control to installer/administrators and general users.
  • Multi-function events each include the day(s) of the week, the effected circuit(s), the time and duration of the event.

  • Special schedules for holidays and automatic schedule changes programmed in advance of their activation dates.
  • Automatic Daylight Savings Time adjustments, supporting international requirements.
  • Available with surface, semi-flush, and 19" rack mount hardware, and capable of drop-ceiling/raised floor installation with optional cable.
  • Schedules and timekeeping functions are retained during power failures; proprietary algorithms allow for rapid, automatic clock recovery.
  • MasterLink desktop/laptop computer management software available on models LTR8-512 and above, not the LTR4-512
  • Demo verison of MasterLink software is included with LTR8-512 only.
  • Dimensions:
    > Surface: 7"H x 13"W x 4.52"D
    > Semi-flush: 7"H x 13"W x 1.12"
    > Rack: 5.2"H x 18.7"W x 7"D (option)
  • Weight: 14 lbs.
  • Input Voltage: 115 / 240 VAC +/- 10%
  • Output:  115/240 **
    **  Requires PS8-2412 Power Supply for low voltage clocks
  • Input Frequency: 50/60Hz
  • Input Power: 30 Watts Max
  • Program Memory Retention: 10 year - Lithium Battery Backup
  • Battery: 10 Year Lithium 
  • Operating Temperature: 32° - 175° F (0°C - 79.4°C)
  • Operating Humidity 5% - 85% RH, non-condensing
  • Accuracy:  +- 30 seconds per year.  Manually synchronized.