LiftMaster 312HM Universal 315 MHz Coaxial Receiver

The LiftMaster 312HM is a universal single-channel radio receiver designed to add 315 MHz remote-control capability to compatible commercial door operators, gate operators and other access-control equipment. Its coaxial antenna connection supports improved antenna placement when the receiver must be installed inside or near a metal operator enclosure.

Features

• 315 MHz LiftMaster radio receiver

• Supports rolling-code, billion-code and compatible DIP-switch transmitters

• Selectable Normal and High Security programming modes

• Stores up to 31 transmitters in Normal Security mode

• Stores up to 15 rolling-code transmitters or wireless passwords in High Security mode

• Relay output connects to a compatible operator’s activation circuit

• Selectable 12VDC or 24VAC/DC power configuration

• Coaxial antenna connection for flexible antenna placement

Compatibility

Designed for compatible 315 MHz LiftMaster remote controls and access systems. This is a legacy 315 MHz receiver and should not be ordered solely because a remote or operator carries the LiftMaster name. Confirm the transmitter frequency, coding technology, required relay operation and available accessory voltage before ordering.

The 312HM does not add myQ connectivity and is not a Security+ 2.0 receiver. For newer Security+ 2.0 applications, consider the LiftMaster 860LM receiver instead.

A separate low-voltage transformer may be required when the existing operator cannot provide compatible accessory power.

How It Works

When a programmed transmitter is activated, the receiver verifies the radio code and momentarily changes its relay contacts. The relay is wired to the compatible operator’s control input, allowing the receiver to initiate the programmed door or gate function.

Package Contents

• One LiftMaster 312HM coaxial receiver

• Installation and programming instructions

Remote controls, external power supplies and application-specific wiring are sold separately unless expressly listed as included.

Installation & Safety

Installation should be completed by a qualified access-control or commercial-door technician. Disconnect power before wiring. Select the correct voltage-jumper position before applying power; connecting 24 volts while configured for 12 volts can permanently damage the receiver. After installation, test the receiver, operator controls, limits and all required entrapment-protection devices.