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Linear / Accessory reference

Linear MDR-2 radio receiver

MDR-2 identifies a radio receiver. The cited source supports only the exact facts and relationships shown; other equipment pairings remain unverified.

US source scopeUpdated 2026-09-11Independent Anderson reference

Match the whole number.

Manufacturer identifier: MDR-2. Keep every character when comparing it with your label or paperwork. A similar number does not establish the same component.

Values apply to the exact identifier and scope in the cited source.
Component functionRadio receiver
Receiver functionExternal radio receiver for operator control
Channel count2 channels
Output typeRelay outputs
Normal supply24 VAC or VDC
Transmitter memory10 transmitters per receiver
Radio formatMegaCode
Document associationThe official index links MDR-2 to a manual whose model row prints MDR2. This association does not create another product identity.
Supply scopeThe 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.

Source statements and their exact conditions. Use the checker below to compare equipment or a receiver.
Equipment or receiver / relationshipEvidence and conditions
ACT-31B

Documented compatibility

From ACT-31B to MDR-2.

ACT-31B is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
ACT-31C

Documented compatibility

From ACT-31C to MDR-2.

ACT-31C is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
ACT-31D

Documented compatibility

From ACT-31D to MDR-2.

ACT-31D is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
ACT-31DH

Documented compatibility

From ACT-31DH to MDR-2.

ACT-31DH is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
ACT-31DHC

Documented compatibility

From ACT-31DHC to MDR-2.

ACT-31DHC is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
ACT-34B

Documented compatibility

From ACT-34B to MDR-2.

ACT-34B is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
ACT-34C

Documented compatibility

From ACT-34C to MDR-2.

ACT-34C is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
ACT-34D

Documented compatibility

From ACT-34D to MDR-2.

ACT-34D is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
ACT-34DH

Documented compatibility

From ACT-34DH to MDR-2.

ACT-34DH is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
ACT-34DHC

Documented compatibility

From ACT-34DHC to MDR-2.

ACT-34DHC is documented for MDR-2 in MegaCode radio-control use. Code enrollment and installation follow the exact equipment instructions; this does not verify an installed system.

Applies only within this source scope
  • Market: US
  • comparison-function: MegaCode radio control
MDTK

Documented compatibility

From MDTK to MDR-2.

MDTK is documented for MDR-2 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
  • Market: US
  • comparison-function: MegaCode radio control

Direct replacement paths

No direct successor for MDR-2 is verified in this reference.

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

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Selected: MDR-2 · Read its reference. Selection identifies a record; it does not confirm fitment.

Choose the equipment or receiver brand separately from the component brand. A missing identifier is unverified. Use the model library to identify your equipment and its official documents.

A receiver radio pairing applies to the exact listed pair. It does not establish the receiver’s suitability for your installed opener or compatibility through another device.

Choose the equipment or receiver brand to load its published identifiers.

Use the production date on the label or records, not the purchase date. Leave blank if unknown.

Use part and model numbers only. Never enter a serial number, PIN or access code. Your entry is used for this lookup and is not put in the page address, saved in browser storage or sent to analytics.

Choose a task and enter or select an exact identifier.

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

  1. ACT transmitter and TRANS PROX compatibility chartLinear LLC · US · checked 2026-09-11 · 232495 B
  2. MDTK digital keypad instructionsLinear LLC · US · checked 2026-09-11 · 208761 D
  3. Linear official manuals index, exact receiver document associationsLinear / Nice · US · checked 2026-09-11
  4. 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.

Related equipment guides

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Confirm a missing detail

Use Linear official support and match the complete part number, equipment model and production details with the source scope.

Use safely accessible labels and existing paperwork. Do not remove powered covers or adjust springs or cables to identify a component.

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.

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