Miller Edge MWR12 1 Channel Receiver, RF 318 MHz - Discontinued - Replaced with the MWR22B
The Miller Edge MWR12 is a single-channel receiver for the legacy 318 MHz MW wireless sensing edge system. It mounts near the operator controls and receives the wireless signal from a compatible Miller Edge MWT12 or MWTA12 transmitter connected to a 2-wire sensing edge.
This part is commonly associated with MWRT12 and MWRTA12 kits. It provides low-voltage relay output to the operator, but it does not convert a non-monitored edge into a monitored safety device. Confirm the receiver generation, frequency, DIP switch code, operator input, and safety requirement before replacing it.
Features and Specifications
| Manufacturer | Miller Edge |
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| Part Number | MWR12 |
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| Product Type | Single-channel wireless sensing edge receiver |
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| Application | Non-monitored wireless edge signal to gate or commercial door operator controls |
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| Frequency | 318 MHz |
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| Voltage | 12-24 VAC/DC nominal |
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| Output | N.O. and N.C. relay output contacts |
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| Receiver Channels | 1 channel |
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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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| Dimensions | Approx. 3-3/4 in. W x 4-13/16 in. H x 1-1/4 in. D |
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| Weight | Approx. 4.6 oz. |
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| Antenna | Attached wire or F connector |
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| Notes | Legacy MW receiver; verify generation and availability |
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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.
- MWT12 legacy 318 MHz transmitter.
- MWTA12 legacy 318 MHz transmitter with low battery alarm.
- MWRT12 single-channel wireless edge system.
- MWRTA12 single-channel wireless edge system with alarm transmitter.
- Pre-April 2024 trinary 9-pole, 3-position DIP switch Miller Edge MW components.
- Current B-series components may require additional programming when mixed with legacy components.
Also Known As / Related Part Numbers
- MWR12
- MWR-12
- MWR 12
- Miller Edge single-channel receiver
- Miller Edge 318 MHz receiver
- MWRT12 receiver
- MWRTA12 receiver
- Legacy trinary MWR12
- MWR12B related current receiver
Technician Note
Receiver problems are often misdiagnosed. A green power LED confirms the receiver has power, while transmitter signal, batteries, DIP switch matching, and antenna placement should be checked before replacing the receiver.
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 the existing receiver is MWR12 and not MWR12B.
- Confirm whether the single-channel receiver is being replaced as a component or as part of a complete kit.
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 transmitter works with MWR12?
MWR12 is used with compatible Miller Edge 318 MHz transmitters such as MWT12 and MWTA12 in legacy MW wireless edge systems.
Is MWR12 the same as MWR12B?
No. MWR12 and MWR12B are different generation references. Verify the part number, DIP switch style, and instructions before mixing legacy and B-series parts.
What voltage powers the MWR12 receiver?
MWR12 is powered from a 12-24 VAC/DC low-voltage source from the operator control panel.
Can MWR12 be used with monitored sensing edges?
No. MWR12 is for 2-wire non-monitored sensing edge applications. Monitored edge installations need the correct monitored interface or monitored wireless system.
Why does range seem weak on an MWR12 system?
Weak batteries, metal operator enclosures, poor antenna placement, interference, or mismatched coding can all cause poor or intermittent reception.