Lathem Sonachron Replacement Bell System Kit
Programmable work shift timer and bell system built around the Pyramid 7000 master clock.
Description
This Lathem Sonachron replacement kit is designed to replace older Sonachron DWA-S bell systems with a modern, reliable controller. The system uses the Pyramid 7000 master clock to automate shift changes, breaks, lunches, and scheduled alerts using a connected 110V bell.
Programming is done directly at the controller, allowing fully stand-alone operation with no software or network connection. Once programmed, the system activates the bell automatically according to the stored schedule.
System Features
- Direct replacement for Lathem Sonachron bell timers
- Programmable daily schedules with multiple events
- Automatic Daylight Saving Time adjustment
- Maintains programming through power outages
- Adjustable signal duration for warnings or shift changes
Included Components
| Controller |
Pyramid 7000 master clock |
| Bell Output |
Internal 110VAC relay |
| Bell |
High-volume 110V fire bell |
| Power & Wiring |
Power supply and bell wire included |
Expandability
The system can be expanded to support additional bells, buzzers, or synchronized clocks without replacing the main controller. This makes it ideal for facilities planning future growth or multi-area signaling.
FAQ
Is this a direct replacement for a Sonachron system?
Yes. It is commonly used when Sonachron timers fail or replacement parts are no longer available.
Can additional bells be added?
Yes. Multiple bells or buzzers can be connected using proper wiring.
Does it keep time during power loss?
Yes. Programming is retained and correct time is restored when power returns.
Related Items
- Pyramid 7000 Master Clock Controller
- 6-Inch 110V AC Bell
- Industrial Vibrating Buzzer (110V)
- Manual Ring Button
- Bell Wire (25 ft / 50 ft / 100 ft / 250 ft)
What’s Included
- Pyramid 7000 master clock terminal with owner’s manual
- Power supply
- Internal 110V, 10-amp mechanical relay (pre-wired and tested)
- 10-amp rated grounded 110V power cord
- 10 ft bell wire cable (extend as needed)
- Loud red 110V fire bell (expandable)
- Toll-free U.S. technical support
- One-year product replacement guarantee
System Control Capacity
The upgraded 110VAC Pyramid 7000 scheduled timer can control:
- Up to 200 Pyramid digital clocks within 300 feet
- Up to 8 standard 110VAC bells (expandable with power booster)
- Up to 6 loud 110V buzzers (expandable with power booster)
Optional Upgrades
- Momentary contact manual ring button
- Synchronized digital wall clocks
- Synchronized analog (dial) clocks
- Strobe light activation with bell events
Specifications
| Dimensions |
6" H × 5.5" W × 2" D |
| Power |
Requires two plugs (standard duplex outlet) |
| Output |
24VDC base, converted to 110VAC via 10-amp DPDT relay |
ETC Installation Experience
We have installed over 800 Pyramid 7000 bell and clock systems (as of August 2021). We do not copy web content — we work with this equipment in the field, solve real installation problems, and support systems long after installation.
This hands-on experience is rare in this industry. If you have questions, call us. We know this system inside and out.
Information you will not find anywhere else...
Run unlimited bells and buzzers from this timer
Run up to 200 Pyramid Digital, or 8 analog (dial face) clocks, up to 300' out.
Pyramid digital clocks self-amplify the time signal and forward it to the next clock via the company's proprietary BCD cable.
Pyramid's 13" dial face "analog" clocks do not have this signal amplification feature. So, every 200' or 8 clocks - whichever comes first - you need to add/purchase a PTR5300 power supply. This amplifies the time signal and allows you to extend the range.
Work with people who obsess over the details - so you don't have to.