LiftMaster 50800 RBMA Electric Treadle NEMA 4/12
The LiftMaster 50800 RBMA electric treadle is used for vehicle activation in commercial door and access control applications. When a vehicle passes over the treadle, the weight compresses the internal switch and sends a signal to the operator control circuit.
This is an electric treadle, not a pneumatic hose kit. It is suited for applications where a physical vehicle-actuated switch is preferred and where the operator input supports the intended open or safety function.
Compatibility and Application Notes
- Commonly used with compatible LiftMaster commercial operators and control circuits that accept a 2-wire switch input.
- May be used for OPEN control on compatible operator setups when wired according to the operator instructions.
- May be used for SAFETY input only where the operator control type and documentation allow that function.
- Associated control wiring types for safety use may include B2, C2, L2, T, T1, or TS depending on the operator.
- Not a loop detector, motion detector, photo eye, or monitored entrapment protection device.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | RBMA electric treadle |
| Part Number | 50800 |
| Application | Vehicle-actuated commercial door or access control input |
| Enclosure | NEMA 4/12 outdoor enclosure |
| Connection | 2-wire connection to compatible operator input |
| Power Requirement | No power required at the treadle switch |
| Activation Method | Vehicle weight compresses electric switch |
| Model | RBMA |
| Notes | Use only with approved control wiring and required safety devices |
Also Known As / Related Part Numbers
- 50800
- 50-800
- RBMA electric treadle
- LiftMaster electric treadle
- NEMA 4/12 treadle
Technician Note
Electric treadles and pneumatic treadles are serviced differently. Confirm the original system type before ordering parts, especially on older commercial door installations.
Before Ordering
- Confirm the job calls for an electric treadle, not a pneumatic hose treadle.
- Confirm the operator has a suitable 2-wire input for the intended function.
- Confirm the treadle location works for vehicle traffic and does not create a pedestrian hazard.
- Confirm the enclosure rating and mounting arrangement fit the environment.
- Confirm monitored safety photo eyes or edges are installed where required.
Professional Advisory
Vehicle treadle wiring can affect automatic door movement. A qualified technician should verify control wiring, safety inputs, and door operation before the system is placed back into service.
Product Questions & Answers
How does the 50800 electric treadle work?
A vehicle compresses the treadle switch, and that switch sends a signal to the connected operator input.
Does the 50800 require power?
The treadle switch does not require power at the treadle. It uses a 2-wire switch connection to a compatible operator input.
Is this the same as the 658206 pneumatic treadle kit?
No. The 50800 is an electric treadle. The 658206 uses a pneumatic hose, air switch, and outdoor enclosure.
Can this treadle be used outside?
It is listed with a NEMA 4/12 outdoor enclosure, but the installation still needs proper mounting, wiring protection, and drainage for the site.
Can it replace photo eyes?
No. This is a vehicle activation or control device. It does not replace monitored photo eyes, sensing edges, or required entrapment protection.
