Miller Edge MWRT12 12/24V AC/DC 1-Channel Single Transmitter/Receiver Kit
The Miller Edge MWRT12 is a single-channel wireless edge system used to transmit a 2-wire non-monitored sensing edge signal to motor controls. It is commonly used where a moving door or gate edge needs to communicate with the operator without a coiled cord, reel, or hardwired cable across the moving section.
The legacy MWRT12 kit is associated with an MWR12 receiver and an MWT12 transmitter. It operates at 318 MHz and is intended for non-monitored edge applications. Current B-series versions exist, so replacement work should verify whether the site uses trinary or binary DIP switch components and whether programming changes are required.
Features and Specifications
| Manufacturer | Miller Edge |
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| Part Number | MWRT12 |
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| Product Type | Single-channel wireless sensing edge transmitter/receiver kit |
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| Application | Non-monitored wireless edge signal for gates and commercial doors |
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| Kit Components | MWR12 receiver and MWT12 transmitter, verify current package contents |
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| Frequency | 318 MHz |
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| Receiver Voltage | 12-24 VAC/DC nominal |
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| Output | N.O. and N.C. receiver relay contacts |
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| Transmitter Input | 2-wire N.O. non-monitored sensing edge |
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| Operating Range | Up to 100 ft under optimal conditions |
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| Operating Temperature | 0 F to 130 F |
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| Transmitter Enclosure Rating | NEMA 4 |
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| Notes | Legacy / discontinued MW kit; verify generation before mixing with B-series parts |
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Compatible With
- Miller Edge 318 MHz MW wireless sensing edge systems.
- Commercial motorized door operators using a non-monitored safety edge input.
- Automated vehicular gate operators using a non-monitored safety edge input.
- Older commercial door operators manufactured before August 2010 when a non-monitored edge system is allowed by the operator and site requirements.
- Older automated gate operators manufactured before January 2016 when a non-monitored edge system is allowed by the operator and site requirements.
- Miller Edge 2-wire, non-monitored, normally open sensing edges, sold separately.
- Applications requiring dry contact N.O. or N.C. receiver output to the operator control board.
- Not intended as a substitute for a monitored sensing edge system where monitored entrapment protection is required.
- MWR12 single-channel receiver.
- MWT12 wireless sensing edge transmitter.
- Related MWRTA12 kit when a low battery alarm transmitter is required.
- Pre-April 2024 trinary 9-pole, 3-position DIP switch Miller Edge MW systems.
- Current MWRT12B / MWRTA12B systems are related current-generation versions; verify programming and part generation before substitution.
Also Known As / Related Part Numbers
- MWRT12
- MWRT-12
- MWRT 12
- Miller Edge MWRT12 kit
- MWR12 and MWT12 kit
- Miller Edge single-channel wireless edge system
- 318 MHz wireless edge kit
- Legacy MWRT12
- MWRT12B related current kit
Technician Note
When replacing only part of an MWRT12 system, do not assume every 318 MHz component will pair automatically. Match the Miller Edge generation, DIP switch coding, and transmitter/receiver model family before final testing.
Before Ordering
- Match the Miller Edge wireless generation: pre-April 2024 trinary DIP components and current binary DIP components may require additional programming when mixed.
- Verify the job requires a non-monitored 2-wire sensing edge system, not a monitored edge interface.
- Confirm the operator provides 12-24 VAC/DC low-voltage power for the receiver.
- Confirm the receiver output needed by the operator: normally open or normally closed.
- Keep the receiver antenna outside metal enclosures or use the proper remote antenna accessory if signal range is weak.
- Check all safety devices after installation and test that the door or gate stops and reverses properly.
- Confirm whether the job needs the standard MWT12 transmitter or the MWTA12 transmitter with low battery alarm.
- Verify whether a complete kit is needed or only the transmitter or receiver is being replaced.
Professional Advisory
Wireless edge systems must be installed and tested as safety devices, not as simple accessory relays. For high-voltage operator panels, monitored safety requirements, missing entrapment protection, or unreliable gate movement, use a qualified gate or commercial door technician.
Product Questions and Answers
What is included with the MWRT12 kit?
MWRT12 is commonly identified as a single-channel system that includes an MWR12 receiver and an MWT12 transmitter. Always verify current package contents on the product received.
What sensing edge works with MWRT12?
MWRT12 is designed for Miller Edge 2-wire non-monitored sensing edges. The sensing edge itself is normally sold separately.
Is MWRT12 monitored?
No. MWRT12 is a non-monitored wireless edge system. Use an approved monitored system where monitored entrapment protection is required.
What frequency does MWRT12 use?
MWRT12 operates at 318 MHz and must be matched with compatible Miller Edge 318 MHz wireless edge components.
What is the difference between MWRT12 and MWRTA12?
MWRT12 uses the standard MWT12 transmitter. MWRTA12 uses the MWTA12 transmitter, which includes a low battery alarm feature.
