MMTC CPM-1H NEMA 4 Heated Exterior Ceiling Pull Switch
The MMTC CPM-1H is the heated version of the CPM-1 exterior ceiling pull switch. It is used in outdoor, cold-storage, freezer-adjacent, washdown, dock, warehouse, and exposed commercial door locations where moisture, condensation, or cold weather can affect pull-station operation. Like the CPM-1, it uses a rotating and pivoting cam to better accommodate angled pull-cord operation, but it adds a heater circuit that must be matched to the job voltage and wiring method. This is important because the control switch circuit and the heater power circuit may not be the same circuit. The CPM-1H should be selected when the site needs a pull-cord station for compatible operator activation and also needs freeze or condensation resistance. Heater voltage, local code, and operator wiring should be verified before installation.
Common Applications
- Automated driveway gate and commercial gate control stations
- Commercial overhead, rolling steel, and sectional door operator inputs
- Loading dock, warehouse, parking, and service-bay manual activation points
- Access-control interfaces where a keyed or pull-cord dry-contact command is required
- Exterior or damp-location installations when the enclosure rating matches the job
Compatible With
Commercial overhead door operators, rolling door operators, gate controllers, dock controls, parking controls, car wash doors, cold-weather access points, and industrial control panels that accept a compatible SPST pull-station input and have the correct provision for the heater power circuit. Verify heater voltage, control voltage, enclosure requirements, and wiring separation before replacing a non-heated pull switch. Compatible with commercial door operators, rolling steel door operators, sectional overhead door operators, automated gate operators, barrier gate controllers, loading dock controls, parking controls, and access-control panels when the control board accepts the same low-voltage dry-contact command and the enclosure style is suitable for the location. Verify the original wiring diagram, contact type, stop circuit requirements, mounting style, and enclosure rating before ordering.
Features and Specifications
| Manufacturer | MMTC |
| Product Type | Heated exterior ceiling pull switch |
| Part Number | CPM-1H |
| Application | Manual keyed or pull-cord control for compatible gate, door, dock, parking, and access-control systems |
| Compatible Operator Type | Low-voltage control circuits that accept matching dry-contact input; verify wiring diagram |
| Operation | SPST pull switch with rotating and pivoting cam and heater |
| Enclosure / Rating | NEMA 4 exterior universal-mount enclosure with heater |
| Mounting Style | Ceiling pull / surface mount |
| Dimensions | Varies by ceiling-pull enclosure; verify mounting space |
| Included Components | Control station assembly only unless otherwise noted |
| Notes | Not an entrapment protection device; do not bypass required safety devices |
Also Known As / Related Part Numbers
Also known as or commonly searched as:
- CPM-1H
- MMTC CPM-1H
- MMTC-CPM-1H
- CPM1H
- CPM 1H
- heated ceiling pull switch
- heated CPM-1
- 24 VAC heater reference
- 110 VAC heater option reference
Technician Note
Control stations can look alike but behave differently electrically. Match the original contact action and wiring diagram before replacing a key switch or pull switch. A switch with the wrong contact type can cause no operation, unexpected operation, or a missing stop/control function.
Before Ordering Checklist
- Confirm the MMTC part number on the existing switch or job specification.
- Match SPST, DPST, open-close, center-return, heater, and mounting requirements before ordering.
- Verify the operator control board accepts the same dry-contact input and does not require a different station.
- Check enclosure rating, weather exposure, conduit entry, and mounting clearance.
- Do not remove or bypass photo eyes, safety edges, loop detectors, or other required safety devices.
Professional Advisory
Have a qualified gate or commercial door technician handle wiring when the circuit is not clearly identified, when heater power is involved, or when the operator has unsafe movement, missing safety devices, or line-voltage control wiring. This product is for manual command input only and should never be used to bypass monitored entrapment protection.
Product Questions and Answers
When should I use CPM-1H instead of CPM-1?
Use CPM-1H when the ceiling pull station is in a cold, damp, or exposed location where a heater is needed to reduce freezing or condensation issues.
Does the heater use the same wiring as the pull switch?
Not necessarily. The heater circuit must be wired according to the product requirements and local electrical code, separate from assumptions about the control circuit.
Is CPM-1H still an SPST pull switch?
Yes. It is commonly referenced as an SPST ceiling pull switch with a rotating and pivoting cam plus heater.
Can this be used on a gate operator?
It may be used with compatible gate or door controls that accept the correct dry-contact pull input, but the heater and control wiring must be confirmed.
Should a technician install this heated switch?
A qualified technician is recommended when heater power, exterior wiring, or line-voltage circuits are involved.
