LiftMaster LPEXP CAPXL Loop Detector Input Board
LiftMaster LPEXP CAPXL Loop Detector Input Board is an internal loop detector input board used with the LiftMaster CAPXL access-control panel to add plug-in loop detector input capability. It mounts inside the CAPXL and works with the LOOPDETLM plug-in loop detector so a vehicle arriving at a loop can automatically trigger a call to a guard, office, or configured destination depending on the system setup. This kind of replacement part should be matched by the original part number, system type, wiring/contact style, and the equipment parts diagram. Similar-looking LiftMaster, Chamberlain, MMTC, or access-control service parts may use different connectors, contact behavior, voltage requirements, or programming steps.
This page is intended to give buyers a clearer parts-counter style explanation of what the item does and where it is commonly used. For electronic boards, verify the original board number and the model label. For pneumatic switches and mechanical sprocket kits, verify the contact style, chain size, enclosure, or shaft location before replacing the part.
Compatible With
- LiftMaster CAPXL smart access panel / cloud access panel
- LiftMaster LOOPDETLM plug-in loop detector when used with CAPXL and LPEXP
- Vehicle arrival call applications for guard, office, leasing, or entry desk notification
- Gate and community entrance CAPXL installations with an inductive loop detection system
- Not for CAPXS, CAPXLV, CAPXM, CAP2D, or CAPXAP unless the current LiftMaster documentation specifically lists LPEXP
- Not a stand-alone loop detector; requires compatible detector hardware and loop field wiring
Features and Specifications
| Manufacturer | LiftMaster |
| Product Type | Loop detector input board |
| Part Number | LPEXP |
| Application | CAPXL vehicle loop input / arrival call function |
| Compatible Detector | LOOPDETLM plug-in loop detector |
| Mounting | Inside compatible CAPXL panel |
| Dimensions | Approx. 2.8 in x 2.3 in references found |
| Included Components | Input board only unless stated |
| Notes | Loop wire, detector module, and CAPXL setup are separate requirements |
Also Known As / Related Part Numbers
- LPEXP
- LP-EXP
- CAPXL loop detector input board
- LOOPDETLM
- LiftMaster LPEXP
- CAPXL loop board
- Loop detector expansion board
Technician Note
Do not choose this part by appearance alone. Many LiftMaster and access-control service parts share similar housings or board layouts while using different firmware, connector locations, switch contacts, or operator families. Match the original part number and the equipment parts diagram whenever possible.
Before Ordering Checklist
- Confirm the model number on the operator, telephone entry unit, or access-control panel.
- Compare the original part number, label, and physical mounting style.
- For electrical parts, verify voltage, wiring terminals, connector layout, and system generation.
- For control boards, expect to reprogram remotes, keypads, limits, myQ settings, or access-control settings when applicable.
- For safety edge or pneumatic parts, do not bypass safety devices and confirm the required monitored or non-monitored input type.
Professional Advisory
If the equipment has damaged wiring, water intrusion, burned boards, unsafe gate or door movement, missing safety devices, or high-voltage electrical issues, have the system inspected by a qualified gate, garage door, or access-control technician before returning it to service.
Product Questions and Answers
What is the LPEXP board used for?
It adds a loop detector input option to a compatible CAPXL panel, commonly for vehicle-arrival call or notification functions.
Does LPEXP include the loop detector?
No. LPEXP is the input board. The LOOPDETLM detector and the in-ground loop installation are separate unless a kit specifically includes them.
Can this open a gate by itself?
No. It provides an input function within the CAPXL system. The CAPXL programming and connected gate/door relay setup determine what action occurs.
Is LPEXP compatible with every LiftMaster access controller?
No. It is specifically associated with CAPXL and LOOPDETLM use. Other LiftMaster access products may use different expansion boards.
What should be checked before ordering?
Confirm the panel model is CAPXL, verify the planned detector is LOOPDETLM, and confirm the loop purpose in the CAPXL programming.
