Liftmaster 850LM Universal Gate and Garage Door Opener Receiver

The LiftMaster 850LM Universal Receiver is engineered for professional use in gated communities, commercial buildings, and multi-door facilities. Featuring narrow-band multi-frequency radio technology with Security+ 2.0™ rolling code, it reduces interference and eliminates callbacks due to poor range. This receiver supports 811LM and all MAX remote controls, providing flexibility across installations. With three independent channels, it offers scalable remote programming and keyless entry capacity. Compact design allows integration with most gate and commercial door operators. Known also as Models 850 LM and 850 LMC.

Specifications

• Frequency: 310 MHz, 315 MHz, and 390 MHz narrow-band Security+ 2.0™ rolling code and encrypted DIP
• Channels: 3 (Channel 1 – up to 50 remotes, Channels 2 & 3 – up to 20 remotes each)
• Keyless entry: up to 2 per channel
• Relay outputs: 1 FORM C and 2 FORM A relays
• Power: 12–24VDC or 12–24VAC
• Compact housing fits most commercial door and gate operators
• Compatible with remote 813LM for open/close/stop configuration
• Operating temperature: -31°F to 149°F (-35°C to 65°C)
• Storage temperature: -40°F to 185°F (-40°C to 85°C)
• Optional transformer required if operator power does not meet spec (Part Number 85LM)