Liftmaster 71-TRAP, TRAP MODIFICATION, DCS
The LiftMaster 71-TRAP is a trap modification kit for select LiftMaster commercial gate operator systems using DCS-style control logic. It is typically used as a field modification component when the operator documentation requires a specific trap function update or restoration. Since it relates to how the operator control system responds in a commercial gate installation, exact part selection is important.
This kit should not be confused with a simple limit switch, loop detector, photo eye, or edge sensor. It is a modification part that belongs to a specific control arrangement. For safety-sensitive gate systems, the installer must verify the correct application and test the full gate system after installation, including loops, monitored safety devices, and access-control inputs.
Compatible With
- Select LiftMaster commercial slide gate operators using the 71-TRAP DCS modification
- Various LiftMaster commercial slide gate operator systems when the manual or service documentation calls for 71-TRAP
- DCS trap modification applications in supported LiftMaster commercial gate systems
- Not a universal accessory for all LiftMaster gate operators
Features and Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
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| Product Type | Trap modification kit |
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| Part Number | 71-TRAP |
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| Application | DCS trap modification for commercial gate operators |
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| Compatible Operator Type | Select commercial slide gate operators |
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| Safety Category | Control modification; verify entrapment protection after service |
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| Notes | Match by manual, service documentation, or parts diagram |
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Also Known As / Related Part Numbers
- 71-TRAP
- LM-71-TRAP
- LIF-71-TRAP
- Trap Modification, DCS
- LiftMaster DCS trap modification kit
Technician Note
Because this kit is related to operator control behavior, do not use it to bypass or defeat a safety device. The gate should be tested through a full open and close cycle after installation.
Before Ordering
- Confirm the operator model and control board type
- Verify that the service documentation calls for 71-TRAP
- Check all loop, photo eye, and edge sensor inputs before and after service
- Do not substitute this for a safety sensor or loop detector
- Have a qualified gate technician perform the work
Professional Advisory
Commercial gate control modifications should be completed with power secured and with the full entrapment-protection system tested before returning the gate to service.
Product Questions and Answers
What is the 71-TRAP used for?
It is a DCS trap modification kit used on select LiftMaster commercial slide gate operator systems.
Is it a safety sensor?
No. It is not a photo eye, edge sensor, or loop detector. It is a control modification part.
Can it be used on any slide gate operator?
No. It should only be used when the operator documentation calls for 71-TRAP.
Should the gate be tested after installation?
Yes. The full gate system, including all safety and vehicle detection inputs, should be tested after service.
Is this a do-it-yourself repair?
It is better handled by a qualified gate technician because it affects commercial gate control logic.
