Lathem Replacement System Clocks & Upgrade Options
Replace Legacy Lathem Clock Systems Without a Full System Tear-Out
If your facility is using legacy Lathem system clocks, you don’t need to replace your entire system. American Time offers AllSync Plus® replacement clocks designed to work with existing Lathem wiring, saving time, cost, and disruption.
How the Replacement Process Works
No Full System Replacement Required
Upgrading your facility’s timekeeping doesn’t have to mean a costly, “rip-and-replace” overhaul of your entire infrastructure. American Time’s AllSync Plus® technology is specifically designed as a sustainable, incremental upgrade path. By utilizing a drop-in replacement approach, you can phase out failing mechanical clocks one by one as your budget allows, rather than committing to a total system capital expense.
This solution allows you to reuse existing wiring, significantly reducing labor costs and eliminating the need for invasive construction or new cable runs. Installation is streamlined for minimal downtime; with an industry-standard Molex® quick-connect plug, a technician can swap an obsolete unit for a modern AllSync Plus clock in minutes, ensuring your facility remains on schedule without operational interruptions.
Works With Existing Infrastructure
AllSync Plus is the “universal translator” of the synchronized clock world, engineered to integrate seamlessly into a vast array of professional environments, including K-12 schools, multi-campus healthcare systems, and industrial manufacturing plants. Whether your facility currently operates on 120VAC or 24VAC power, AllSync Plus models are available to match your specific voltage requirements without additional transformers.
The true power of this technology lies in its ability to automatically sense and adapt to various sync methods. The solid-state circuit board intelligently reads the correction signals from your existing master clock—including legacy protocols from brands like Simplex, Lathem, Dukane, and Faraday. This compatibility ensures that your new clocks stay perfectly synchronized with the rest of your system from the moment they are plugged in, maintaining 100% accuracy across your entire infrastructure.
Why Upgrading Legacy Lathem Systems Often Beats Repair
The 3-wire movement (SS Series) is the most common type used with Lathem synchronous clocks and is compatible with ALLSYNC PLUS technology. AllSync Plus clocks are available in 120VAC and 24VAC, so be sure to select the correct voltage for your replacement clock.
Precision, Energy Efficiency and Flexibility with Lifetime Technical Support
AllSync Plus clocks are available in many more styles than their counterparts. When replacing Lathem SS Series clocks, the choice of case material and style is up to you!
- Plug-n-play Molex Connection
- Accurate to within one second of the system controller
- 15 minutes of continued operation during power outages
- 3-Year warranty
Compatible Replacement for Lathem System Clocks
- Designed to replace most Lathem wired system clocks
- Uses existing wiring (no system overhaul)
- Ideal for schools, hospitals, and commercial facilities
- Supports phased upgrades (room-by-room)
Lathem brand analog clocks are described by a prefix followed by up to 8 numaric or alpha-numeric model number
- SS Prefix – (Synchronous Wired Secondary) may also be preceded by (24)
- NAT Prefix – Similar to SS clock, compatible with National Time System
- ISC Prefix – (Minute Impulse Secondary Clock) specify 2- or 3-wire and if 12 hour correction is desired
The remaining digits in the model number describe the clock size, shape, mounting application, case and lens material.
Select the correct Lathem Impulse Clock System
Impulse clocks come in 2- and 3-wire models and with hourly only or hourly and 12-hour correction.
Look for the two-letter code in the model number when selecting a replacement clock for your Simplex system:
[FF] 2-wire, hourly correction
[FG] 2-wire, hourly and 12-hour correction
[JF] 3-wire, hourly correction
[JG] 3-wire, hourly and 12-hour correction
Looking Beyond Replacement? Upgrade to AllSync IQ
If you’re struggling with an outdated Lathem program timer, contact us to find out how easy it can be to replace it with AllSync IQ. This scheduling device provides synchronized control of wired secondary clocks, bells and other electrical circuits. Programming is fast and easy using the Remote Connect web interface or keypad.
- Control up to 99 schedules and 9999 events
- Automatic adjustments for daylight saving time and leap year
- Six signal circuits and two clock circuits
- Surge protection
- 5-Year warranty
Frequently Asked Questions About AllSync Plus® Clocks for Lathem Systems
What is AllSync Plus®?
American Time’s AllSync Plus® replacement clocks are a high-performance analog clock system designed to provide synchronized, maintenance-free timekeeping across facilities such as schools and hospitals. Unlike traditional mechanical clocks, AllSync Plus utilizes solid-state circuit board technology that intelligently adapts to multiple master clock signals without manual adjustment. This modern movement is highly energy-efficient, consuming up to 80% less energy than conventional mechanical models while maintaining accuracy to within one second of the system controller.
Why is AllSync Plus® used for replacements?
For facilities managing aging infrastructure, AllSync Plus is the preferred choice for replacements because it is engineered to be “plug-and-play” with existing wired systems. These clocks can read various correction protocols, allowing facility managers to replace failing clocks from multiple brands—including Simplex, Dukane, and Faraday—with a single, reliable model. Additionally, they feature 15 minutes of reserve power to maintain continuous operation during brief power outages, eliminating the need for battery replacements and manual resets.
How is AllSync Plus® different from legacy Lathem clocks?
AllSync Plus differs significantly from legacy Lathem clocks, which traditionally relied on older mechanical movements that are now largely obsolete or difficult to repair. While legacy Lathem synchronous clocks often use complex gear systems that wear out over time, the AllSync Plus movement has fewer moving parts, ensuring a longer lifespan and quieter operation. American Time also offers specialized replacement movement kits specifically for Lathem models, allowing users to upgrade the internal technology of their original cases to modern solid-state standards while keeping their existing wiring intact.
How long is the Warranty for Lathem clocks?
AllSync Plus clocks carry a three-year warranty, compared to just one or two years for mechanical movements. We also offer lifetime support for your purchase. We’re here to help if you have questions! Call us at 800-328-8996
Find A Replacement
Once you’ve identified your clock model, try our Replacement Clock Finder or call 800.328.8996 for model number assistance.
| Legacy Lathem Clocks | AllSync Plus® Replacement |
|---|---|
| Aging components | Modern, supported hardware |
| Limited availability | In-stock, current production |
| Higher long-term maintenance | Lower lifetime cost |
| Difficult repairs | Simple part replacement |
Upgrade your wired system today.
Transition to wireless for tomorrow.
You may just need a replacement clock or some repair kits to keep your wired system running today. But, there is another way.
By switching to a hybrid wired/wireless controller, you can prepare for tomorrow. WIRELESS SYSTEMS give you the flexibility to add any number of clocks. Hang them wherever you need them without the expense of wiring another circuit.
Need advice? Talk to an expert.
From maintaining to upgrading, we can help you through each consideration.
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