LiftMaster RPEN4-BKT Mounting Bracket for CPS-RPEN4 Photo Eye
The LiftMaster RPEN4-BKT mounting bracket is a support component for CPS-RPEN4 monitored retro-reflective photo eye installations. In a retro-reflective system, one powered sensor communicates with a reflector across the opening, so stable mounting is critical. A bracket that moves, twists, or vibrates can knock the beam out of alignment and create intermittent safety faults, nuisance stops, or failure to close. RPEN4-BKT is used when the original CPS-RPEN4 bracket is damaged, missing, corroded, or no longer holds the sensor assembly correctly. This part does not replace the sensor or reflector; it simply provides the physical mounting support needed for proper alignment. After installation, the photo eye must be aligned and tested according to the operator and sensor instructions.
Compatible With
Features and Specifications
| Manufacturer | LiftMaster |
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| Product Type | Mounting bracket |
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| Part Number | RPEN4-BKT |
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| Application | CPS-RPEN4 photo eye mounting |
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| Compatible Operator Type | Commercial door / perimeter access monitored safety systems |
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| Related Sensor | CPS-RPEN4 |
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| Included Components | Bracket only |
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| Notes | Sensor and reflector are sold separately unless included in another kit |
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Also Known As / Related Part Numbers
- RPEN4-BKT
- LiftMaster RPEN4-BKT
- CPS-RPEN4 mounting bracket
- CPS-RPEN4GM bracket
- Photo eye mounting bracket
- Reflective photo eye bracket
Technician Note
Mounting is part of the safety system. Use a rigid surface, protect the sensor from impact where possible, and recheck alignment after tightening the bracket hardware.
Before Ordering Checklist
- Confirm the site uses a CPS-RPEN4 or supported CPS-RPEN4GM style sensor.
- Confirm whether the bracket is for the sensor side or reflector side.
- Inspect the reflector and powered photo eye for damage.
- Use appropriate mounting hardware for the surface.
- Test the monitored safety input after installation.
Professional Advisory
Do not bypass a monitored photo eye because a bracket is missing or damaged. Replace the mounting hardware and restore proper safety operation before putting the door or gate back in service.
Important Ordering Warnings
- This is not the complete CPS-RPEN4 photo eye kit.
- Do not use a loose bracket that allows beam movement.
- Do not defeat the monitored safety circuit to clear a fault.
Product Questions and Answers
What photo eye does RPEN4-BKT fit?
RPEN4-BKT is the mounting bracket used with the LiftMaster CPS-RPEN4 monitored retro-reflective photo eye system.
Is this the complete photo eye?
No. This is the mounting bracket only. It does not include the powered sensor, reflector, cable, or operator wiring.
Why is the bracket important?
A firm bracket helps hold the photo eye and reflector alignment. Loose or bent brackets can cause nuisance reversals or safety faults.
Can it be used outdoors?
It is used with CPS-RPEN4 installations, including NEMA 4 / outdoor-rated sensor applications, but the mounting surface and hardware must be appropriate for the site.
Does replacing the bracket bypass safety monitoring?
No. It only supports the sensor assembly. The monitored photo eye must remain wired and functioning according to the operator manual.
