Miller Edge MWR22B Two-Channel Receiver Technical Details
The Miller Edge MWR22B is a two-channel, non-monitored wireless sensing-edge receiver for select motorized commercial doors and automated gate systems. It receives activation signals from compatible MWT12B and MWTA12B transmitters and provides relay outputs to the connected operator.
The MWR22B allows sensing edges on moving doors or gates to communicate with the operator without a moving coil cord, retracting reel, or hard-wired connection. Each transmitter connects to a compatible 2-wire normally open sensing edge and is assigned to one of the receiver's two wireless channels.
What the MWR22B Receiver Does
When a paired transmitter detects that its sensing edge has been compressed, it sends a 318 MHz wireless signal to the MWR22B. The receiver activates the applicable channel and changes its relay output so the operator can provide its programmed stop or reverse response.
The receiver includes LED indicators for power, channel 1, and channel 2. These indicators help confirm receiver power, transmitter coding, channel assignment, and edge activation during setup and troubleshooting.
Compatible With
- Miller Edge MWT12B wireless sensing-edge transmitters
- Miller Edge MWTA12B transmitters with audible low-battery alarm
- Compatible 2-wire normally open, non-monitored sensing edges
- Select commercial and industrial door operators accepting a non-monitored relay input
- Select automated vehicular gate operators accepting a non-monitored relay input
- Applications requiring two separately assigned wireless edge channels
Exact operator compatibility depends on the operator manufacturer, complete model number, production date, control-board generation, required N.O. or N.C. input, and current operator manual.
Two Wireless Receiver Channels
The MWR22B provides two wireless channels. Compatible transmitters are assigned to channel 1 or channel 2 through the transmitter coding-switch configuration.
- Channel 1: Current binary transmitter SW9 is set for channel 1 according to Miller Edge instructions.
- Channel 2: Current binary transmitter SW9 is set for channel 2 according to Miller Edge instructions.
- Multiple transmitters: Miller Edge states that multiple compatible transmitters may be used on each channel.
The reviewed public specifications do not state a fixed maximum number of transmitters per MWR22B channel. Confirm the required transmitter quantity and coding arrangement with current Miller Edge documentation when planning a larger system.
Normally Open and Normally Closed Outputs
The MWR22B provides normally open and normally closed relay output options for connection to a compatible operator input. The receiver's common and selected output lead must be connected according to the operator manufacturer wiring diagram.
An operator terminal labeled EDGE, SAFETY, REVERSE, N.O., N.C., or COMMON does not automatically confirm compatibility. The operator must permit a non-monitored relay device for the intended function.
Important Non-Monitored Compatibility Warning
The MWR22B does not provide 10K resistance, 8.2K resistance, diode-capacitor monitoring, pulsed monitoring, wireless supervision, or proprietary monitored communication.
Miller Edge generally associates the MW non-monitored wireless family with commercial door operators manufactured before August 2010, automated vehicular gate operators manufactured before January 2016, or secondary detection where permitted.
These dates are general selection guidelines and do not guarantee compatibility with a particular operator. Never use MWR22B to bypass a monitored safety input or replace required monitored entrapment protection.
Binary and Trinary Coding Warning
Current MWR22B receivers manufactured after the April 2024 Miller Edge engineering change use a 9-pole, 2-position binary coding switch.
The discontinued MWR13 three-channel receiver and older MWT12 and MWTA12 transmitters used 3-position trinary coding. Miller Edge states that binary and trinary components may communicate when the coding switches are mapped according to the current installation addendum.
Additional setup is required when mixing generations. Do not assume that MWR22B is a direct plug-and-play replacement for MWR13 or that every older transmitter will operate without coding changes.
Antenna and Wireless Range
- Frequency: 318 MHz
- Operating range: Up to 100 feet under optimal conditions
- Attached antenna: Insulated wire antenna
- External antenna connection: F-connector fitting
- Related antenna: ANT-RC 318 MHz rigid insulated antenna
The antenna should be positioned outside metal operator enclosures and remain in line of sight with the transmitters throughout the complete door or gate travel. Metal panels, gate frames, structural steel, operator cabinets, nearby radio equipment, and antenna placement can reduce actual range.
Comparison With Similar Miller Edge Products
- MWR22B: Current binary-coded two-channel receiver sold as an individual component.
- MWR12B: Current single-channel receiver generally supplied only in MWRT12B or MWRTA12B kits.
- MWR13: Discontinued trinary-coded three-channel receiver. Additional coding setup is required when mixing generations.
- MWT12B: Current non-monitored transmitter without an audible low-battery alarm.
- MWTA12B: Current non-monitored transmitter with an audible low-battery alarm.
- RBand receivers: Monitored wireless receivers for 10K/T2 or DC/T3 sensing edges. They are not substitutes for MWR22B.
Similar Parts That Are Not Automatically Interchangeable
- Discontinued MWR13 trinary receivers
- MWR12B single-channel receivers
- RBand monitored wireless receivers
- AW14-RF Air-Wave receivers and transmitters
- Wireless receivers operating at another frequency
- Operator-manufacturer proprietary edge receivers
- Receivers requiring 10K, pulsed, or diode-capacitor monitoring
Features and Specifications
| Specification | Details |
| Brand | Miller Edge |
| Part Number | MWR22B |
| Product Type | Two-channel wireless sensing-edge receiver |
| Monitoring Type | Non-monitored |
| Receiver Channels | 2 |
| Compatible Transmitters | MWT12B and MWTA12B |
| Transmitter Capacity | Multiple compatible transmitters per channel; exact maximum not stated in reviewed public specifications |
| Required Transmitter Edge Input | 2-wire normally open, non-monitored sensing edge |
| Receiver Outputs | Normally open and normally closed relay options |
| Frequency | 318 MHz |
| Operating Range | Up to 100 feet under optimal conditions |
| System Response Time | Approximately 70 milliseconds |
| Coding | Selectable 9-pole, 2-position binary DIP switch |
| Receiver Power | 12-24 VAC/DC nominal |
| Published Current Data | Official documents list 60 mA nominal and 140 mA activated; installation data also lists 15 mA average relay off and 54 mA average with one relay on |
| Receiver Indicators | Power, channel 1, and channel 2 LEDs |
| Antenna | Attached insulated wire antenna or F-connector external antenna connection |
| Wiring | Integral 18-inch wiring with #6 spade lugs |
| Operating Temperature | 0 F to 130 F |
| Enclosure Material | Polycarbonate |
| Receiver Enclosure Rating | No NEMA rating published in current specification table |
| Approximate Dimensions | 3-3/4 inches wide x 4-13/16 inches high x 1-1/4 inches deep |
| Approximate Weight | 4.6 ounces |
| Agency Compliance | FCC Part 15 |
| Manufacturer Warranty | 2 years from shipment, subject to Miller Edge warranty terms |
Package Contents
- One Miller Edge MWR22B two-channel wireless edge receiver
The receiver includes its integral wiring, attached antenna wire, and F-connector antenna fitting. A transmitter, sensing edge, transmitter batteries, receiver mounting hardware, coaxial cable, external rigid antenna, and operator accessories are not included.
Related Parts and Accessories
- MWT12B wireless sensing-edge transmitter
- MWTA12B transmitter with audible low-battery alarm
- ANT-RC 318 MHz rigid insulated antenna
- Coaxial cable for an exterior-mounted antenna
- Female-to-female coaxial bulkhead adapter
- MET-101 Miller Edge sensing-edge tester
- Compatible 2-wire normally open sensing edge
Technician Note
The receiver antenna should be placed outside metal enclosures and remain in line of sight with every transmitter throughout the full range of door or gate travel. The advertised 100-foot range should not be treated as guaranteed at every site.
Current transmitters and receivers must use matching coding settings, with the transmitter assigned to the intended channel. Mixed binary and trinary installations require the coding conversion procedure in the current Miller Edge addendum.
The receiver has no published NEMA enclosure rating in the current specification table. Mount it inside a suitable protected operator cabinet or enclosure as required by the environment.
Before Ordering Checklist
- Confirm that the existing receiver label reads MWR22B.
- Record the existing transmitter model and suffix.
- Verify whether the transmitter is MWT12B or MWTA12B.
- Check whether the existing equipment uses current binary or discontinued trinary coding.
- Determine which transmitters must be assigned to channel 1 and channel 2.
- Confirm that the sensing edges are 2-wire normally open and non-monitored.
- Verify that the operator accepts a non-monitored N.O. or N.C. relay output.
- Confirm that 12-24 VAC/DC nominal power is available.
- Plan the antenna location outside the metal operator enclosure.
- Determine whether coax, an external antenna, receiver hardware, or field wiring is required.
Installation and Safety Advisory
Disconnect operator power before wiring the receiver. Installation, coding, channel assignment, antenna placement, operator connection, and final testing must follow current Miller Edge instructions and the operator manufacturer manual.
Never bypass a monitored safety input, jumper an entrapment-protection circuit, or use MWR22B to conceal a sensing-edge fault. Test each connected edge near both ends and at the center after installation and during regular maintenance.
A qualified commercial door, gate, garage door, or low-voltage technician should complete the work when the coding generation, channel assignment, receiver output, operator input, or required safety configuration is unclear.
Product Questions & Answers
Which transmitters are compatible with the Miller Edge MWR22B?
MWR22B is designed for current MWT12B and MWTA12B transmitters. Older MWT12 and MWTA12 transmitters may require additional binary-to-trinary coding setup.
Are transmitters included with the MWR22B receiver?
No. MWR22B is sold as an individual receiver component. Compatible transmitters, sensing edges, and transmitter batteries are separate.
What sensing edge is required for an MWR22B system?
The compatible MWT12B or MWTA12B transmitter requires a 2-wire normally open, non-monitored sensing edge.
What outputs does the MWR22B provide?
The receiver provides normally open and normally closed relay output options. Use only the output approved for the exact operator and control-board generation.
How many channels does the MWR22B receiver have?
MWR22B has two wireless channels. Compatible transmitters are assigned to channel 1 or channel 2 through their coding-switch configuration.
What is the wireless range of the MWR22B?
The MW system may operate up to 100 feet under optimal conditions. Metal enclosures, structural steel, antenna placement, and radio interference can reduce actual range.
Can MWR22B replace an older MWR13 receiver?
MWR22B uses current 2-position binary coding, while MWR13 uses discontinued 3-position trinary coding and has three channels. Mixed-generation use requires additional coding setup, so MWR22B is not a direct three-channel replacement.
Is the MWR22B a monitored wireless receiver?
No. MWR22B is non-monitored. Applications requiring supervised wireless sensing-edge protection should use the correctly matched Miller Edge RBand system.
