MMTC PBS-3R NEMA 1 Three Button Interior Surface Mount Control Station Contact
The MMTC PBS-3R is an interior surface-mount three-button control station used when an operator needs separate open, close, and stop commands from a wall-mounted station. It is typically installed inside a guard house, equipment room, warehouse, service bay, maintenance area, or other dry indoor location where a NEMA 1 enclosure is appropriate. The important fitment point on this version is the stop circuit. PBS-3R is commonly searched as a reverse-contact version of the PBS-3 family, with the stop button contact arrangement used on controls that require a normally open stop input instead of the more common normally closed stop circuit. That detail matters because many commercial door and gate operators monitor the stop input differently. This is a control station, not an operator, receiver, safety device, or power supply, and it should be matched to the operator wiring diagram before replacement.
Compatible With
This control station is compatible by control-circuit design, not by brand name alone. Use it only when the operator or control panel supports the same button functions and contact style.
- Select commercial garage door operators with separate open, close, and stop station terminals
- Select rolling steel door, rolling grille, sectional overhead door, parking door, and industrial door operators using dry-contact station inputs
- Select commercial gate operators and access-control panels when the controller supports a three-button open-close-stop station
- Indoor control stations in guard booths, warehouse offices, equipment rooms, service counters, and maintenance areas
- Applications that specifically call for the PBS-3R stop contact arrangement rather than the standard PBS-3 stop contact
Features and Specifications
| Manufacturer | MMTC |
| Product Type | Interior three-button control station |
| Part Number | PBS-3R |
| Application | Manual control station for gate, commercial door, overhead door, parking, or equipment-control circuits |
| Button Function | Open, close, and stop |
| Contact Style | Momentary push buttons; stop contact configuration differs from standard PBS-3 references |
| Enclosure / Mounting | NEMA 1 interior metal surface-mount enclosure |
| Approximate Dimensions | Approx. 5-5/16 in H x 2-3/8 in W x 1-13/16 in D |
| Compatible Operator Type | Select operators or control panels with matching dry-contact control inputs |
| Included Components | Control station assembly only unless otherwise stated |
| Notes | Verify button function, stop-circuit logic, contact style, and wiring diagram before replacement |
Also Known As / Related Part Numbers
Technician Note
Use PBS-3R only where the stop-circuit contact style matches the operator. A normally open stop button cannot be substituted for a normally closed stop circuit unless the controller is designed and wired for that logic. These stations are typically wired to low-voltage or control-voltage terminals, but the actual circuit rating and wiring method must follow the operator manufacturer instructions.
Before Ordering Checklist
- Confirm the exact MMTC part number on the old station or parts list.
- Confirm the number of buttons and the intended button functions.
- Check whether the application is interior or exterior and whether the enclosure rating is appropriate.
- Match the contact style, including momentary, maintained, single-pole, double-pole, normally open, and normally closed requirements.
- Compare the enclosure footprint, conduit entry, and available mounting space.
- For any stop or emergency-stop circuit, verify the control logic before changing parts.
Professional Advisory
Do not use a push-button station to bypass monitored safety devices, entrapment protection, interlocks, or required stop circuits. If the operator moves unexpectedly, has damaged controls, or involves high-voltage wiring, have the system checked by a qualified gate or commercial door technician.
Questions and Answers
What is the MMTC PBS-3R used for?
The MMTC PBS-3R is used as a manual control-station device for compatible gate, commercial door, overhead door, parking, or equipment-control circuits. The exact button function depends on how the control station is wired to the operator or panel.
Is the MMTC PBS-3R compatible with all gate and garage door operators?
No. It may be used with select operators that accept the same dry-contact input style, button count, enclosure type, and contact arrangement. Always match the wiring diagram and the original control-station function before ordering.
Can this control station be used as a safety device?
No. This is a manual command device. It is not a monitored photo eye, safety edge, loop detector, or entrapment protection device, and it should not be used to bypass required safety devices.
What should be checked before replacing an existing PBS-3R?
Check the original part number, button labels, enclosure footprint, conduit entry, contact type, stop-circuit logic where applicable, and whether the operator expects normally open or normally closed control contacts.
Can a similar MMTC station with the same number of buttons be substituted?
Not automatically. Similar-looking MMTC stations may differ by enclosure material, NEMA rating, double-pole contact construction, latching versus momentary action, stop contact logic, or mounting footprint.
