The LiftMaster CPS-U commercial photo eye kit provides monitored entrapment protection for compatible LiftMaster commercial door operators. It is a common safety device on many LiftMaster commercial door systems and is intended for indoor use with a NEMA 1 general-purpose enclosure.
This kit should be matched to the operator model and safety-device requirements. If the application is outdoors, wet, or exposed to wash-down conditions, a different LiftMaster NEMA 4 photo eye option may be required.
Compatibility and Application Notes
- Standard photo-eye family for many Logic 5.0 and Medium-Duty LiftMaster commercial operator applications.
- Also used with select Logic 3, Logic 4, FDC, FDCL, FDO, and LGE commercial operator applications where specified by the manual.
- Used as a primary and/or ancillary monitored entrapment protection device when approved for the operator.
- NEMA 1 enclosure is intended for general indoor use.
- For outdoor or wet locations, review CPS-UN4, CPS-OPEN4, CPS-RPEN4, or other approved LiftMaster alternatives.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Commercial monitored photo eye kit |
| Part Number | CPS-U |
| Application | Commercial door monitored entrapment protection |
| Enclosure | NEMA 1 general purpose |
| Use Environment | Indoor applications |
| Sensor Type | Dual-sided infrared sensors |
| Maximum Range | Commonly referenced up to 30 ft. |
| Alignment | Solid sensor lights indicate proper alignment in common references |
| Notes | Confirm operator generation and approved safety device requirements |
Also Known As / Related Part Numbers
- CPS-U
- 41K4629
- Commercial photo eyes
- Commercial Protector System CPS-U
- LiftMaster monitored photo eye
Technician Note
CPS-U is a monitored safety device. If the operator shows a safety sensor fault, correct the alignment, wiring, or failed component instead of trying to bypass the photo eye input.
Before Ordering
- Confirm the commercial operator specifically supports CPS-U.
- Confirm the installation is indoors or otherwise suitable for a NEMA 1 enclosure.
- Confirm the opening width is within the photo eye range.
- Confirm the photo eyes will be mounted at the required height and location.
- Confirm all safety inputs are tested after installation.
Professional Advisory
Commercial door safety device replacement should be tested through a full open and close cycle after installation. If the door moves unpredictably, has damaged wiring, or has missing safety devices, contact a qualified commercial door technician.
Product Questions & Answers
Is CPS-U a monitored safety device?
Yes. CPS-U is a LiftMaster commercial monitored photo eye kit used for compatible commercial door operator entrapment protection applications.
Can CPS-U be used outdoors?
CPS-U has a NEMA 1 general-purpose enclosure and is intended for indoor use. Outdoor or wet areas may require a NEMA 4 LiftMaster photo eye option.
What operators commonly use CPS-U?
It is commonly associated with Logic 5.0 and Medium-Duty commercial operators, and it may also be used with select earlier commercial operator families when specified by the manual.
What is the sensing range?
CPS-U is commonly referenced with a maximum range of up to 30 ft. for the photo eye beam.
Can I replace CPS-U with CPS-N4?
Not automatically. The operator model, monitoring requirements, input type, and environment determine the correct replacement photo eye system.
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