Linear / Accessory reference
Linear MDR radio receiver
MDR identifies a radio receiver. The cited source supports only the exact facts and relationships shown; other equipment pairings remain unverified.
Match the whole number.
Manufacturer identifier: MDR. Keep every character when comparing it with your label or paperwork. A similar number does not establish the same component.
- MDTK digital keypad instructionsPage 1, Programming Receivers, opening sentence and channel-two callout · checked 2026-09-11 · 208761 D · Linear LLC
- ACT transmitter and TRANS PROX compatibility chartPage 4 Gate Receivers cell, exact MDR-1 identifier · checked 2026-09-11 · 232495 B · Linear LLC
- MDTK digital keypad instructionsPage 1, Programming Receivers, exact MDR identifier; no MDR-1 equivalence stated · checked 2026-09-11 · 208761 D · Linear LLC
- MegaCode MDR and MDR2 receiver installation reference210188 B, page 1, exact MDR row in Description · checked 2026-09-11 · 210188 B · Linear / Nice
| Component function | Radio receiver
|
|---|---|
| Identifier boundary | The MDTK instructions name MDR. The ACT chart separately prints MDR-1; equivalence between these identifiers is not established.
|
| Receiver function | External radio receiver for operator control
|
| Channel count | 1 channel
|
| Output type | Relay output
|
| Normal supply | 24 VAC or VDC
|
| Transmitter memory | 10 transmitters per receiver
|
| Radio format | MegaCode
|
| Supply scope | The 24 V specification is the normal receiver input. Equipment with a different supply requires the separate source-specified arrangement; no universal operator fitment is established.
|
Documented fitment & exclusions
Read the exact equipment or receiver, market, production and variant limits in every row. An omitted pairing has not been verified by this reference.
A receiver radio pairing applies only to the listed devices and source conditions. It does not establish the receiver’s suitability for an installed opener or compatibility through another device.
| Equipment or receiver / relationship | Evidence and conditions |
|---|---|
| MDTK Documented compatibility | MDTK is documented for MDR in MegaCode radio-control use. Keypad enrollment into the four named radio receivers only; no downstream operator fitment. Channel two is stated for MDR-2 only. The receiver must be installed and its keypad code enrolled according to the exact equipment instructions. No downstream opener model compatibility is inferred. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system. Applies only within this source scope
|
Direct replacement paths
MDR/U
ConditionalMatch the exact model and all listed conditions before choosing this replacement.
Details still needed- operator-input
- receiver-power
- source conditions
Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified.
MDR/U is documented as replacing MDR within the receiver/input/power scope shown.
Applies only within this source scope- Market: US
- operator-input: normally-open dry-contact pushbutton input
- receiver-power: 110 VAC +/- 10%, 60 Hz
- Replacement concerns the external radio receiver arrangement described by the source; it does not identify every operator model as compatible.
- MDR/U supplies its own mains-powered receiver instead of the MDR arrangement with an external transformer. Exact equipment input and electrical suitability need confirmation.
- Source manual 220675 A uses both 120 VAC and 110 VAC wording. The electrical condition preserves the literature's 110 VAC +/-10%, 60 Hz rating; check the unit label and qualified installation requirements.
- No reverse interchangeability, automatic replacement chain, or receiver-disabling procedure is asserted.
- MDR/U receiver literaturePage 1, second body paragraph contrasting MDR with external transformer and MDR/U · checked 2026-09-11 · 221931B · Linear LLC
- MDR-U receiver installation instructionsPage 1 Product Description and power wording, both 110 VAC and 120 VAC references · checked 2026-09-11 · 220675 A · Linear Corporation
A direct replacement statement does not establish reverse interchangeability, a kit equivalent or a later replacement chain.
Compare exact equipment or a receiver.
Check a part or accessory pairing
Recall references
No recall reference is included for this identifier in the published dataset. This is not a safety clearance or proof that no recall exists.
Sources & scope
- ACT transmitter and TRANS PROX compatibility chartLinear LLC · US · checked 2026-09-11 · 232495 B
- MDR-U receiver installation instructionsLinear Corporation · US · checked 2026-09-11 · 220675 A
- MDR/U receiver literatureLinear LLC · US · checked 2026-09-11 · 221931B
- MDTK digital keypad instructionsLinear LLC · US · checked 2026-09-11 · 208761 D
- MegaCode MDR and MDR2 receiver installation referenceLinear / Nice · US · checked 2026-09-11 · 210188 B
Anderson prepared this reference from the listed evidence. Source statements are not an Anderson installation inspection or independent product test. Official documents stay on their publisher’s website.
This is an independent Anderson reference. Manufacturer names identify the equipment and do not imply affiliation or authorized-dealer status. Anderson provides repair service in its listed Connecticut communities.
A reference listing does not establish current stock, a price, eligibility for manufacturer support or that a component is faulty.