Liftmaster K74-17750 Horn/Strobe
The LiftMaster K74-17750 is a white horn/strobe warning device for commercial door operator applications. It provides both audible and visible warning when properly connected to a compatible control circuit.
Common Applications
Used on select commercial door operator installations where an ADA-compliant horn/strobe or stronger audible/visual warning device is required. Match voltage, mounting environment, and operator output before ordering.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Horn/strobe warning device |
| Part Number | K74-17750 |
| Related Number | 50-17750 |
| Voltage | 115V |
| Color | White |
| Compliance / Rating | ADA-compliant; weatherproof references commonly associated |
| Application | Commercial door audible/visible warning |
| Compatible Operator Type | Select commercial door operators with proper warning device control provisions |
Also Known As / Related Part Numbers
- 50-17750
- K74-17750 horn strobe
- LiftMaster white horn/strobe
- 115V commercial door horn/strobe
Technician Note
Do not assume a horn/strobe can be added to every operator without additional control hardware. Verify the voltage, warning output, and mounting environment before installation.
Before Ordering
- Confirm K74-17750 or 50-17750 is the correct part reference.
- Confirm 115V operation is correct for the control setup.
- Confirm the mounting location is suitable for the device rating.
- Check whether the operator needs auxiliary contacts or modifications.
- Use a qualified technician for powered warning-device wiring.
Professional Advisory
Audible and visible warning devices should be wired correctly and should not be used as a substitute for required entrapment protection. Line-voltage work should be performed by a qualified professional.
Product Q&A
What does the LiftMaster K74-17750 do?
It provides audible and visible warning through a horn/strobe device on compatible commercial door operator systems.
Is K74-17750 a 115V device?
Yes. It is commonly listed as a 115V horn/strobe warning device.
Is 50-17750 related to K74-17750?
Yes. Some references list 50-17750 as a related supplier or model number for the horn/strobe. Confirm the stock label when exact matching matters.
Can this replace required safety sensors?
No. A horn/strobe is a warning device only and does not replace photo eyes, sensing edges, or other entrapment protection.
Who should install this horn/strobe?
A qualified commercial door technician or electrician should install it because voltage, controls, and mounting requirements must be verified.
