LiftMaster 423LM Three-Channel Coaxial Receiver - 390MHz

390MHz Three-Channel Universal Coaxial Receiver

The LiftMaster 423LM is a three-channel universal coaxial receiver designed for commercial and industrial applications. Operating at 390MHz, this receiver allows control of up to three garage door or gate operators using multi-button transmitters. It supports Open, Close, and Stop commands for each channel, ensuring versatile and secure operation across a wide range of LiftMaster and compatible systems.

Key Features

• Three-channel design for independent operation of up to three doors or gates
• Compatible with LiftMaster 390MHz remote transmitters
• Coaxial antenna connection for enhanced signal reception
• Supports Open, Close, and Stop functions for commercial door openers
• Easy programming via dedicated Learn buttons (A, B, C)
• Adjustable Normally Open (N.O.) or Normally Closed (N.C.) slide switch
• Encrypted 390MHz RF signal ensures stable and interference-resistant operation
• Compatible with LiftMaster Models 86 Coaxial Cable Kit and Transformer 95 (when required)

Technical Specifications

• Model: 423LM
• Frequency: 390 MHz
• Channels: 3 independent outputs
• Output Rating: 5A @ 28VAC/DC max
• Power Requirements: 18–30V AC/DC, 30mA
• Mounting Type: Wall or operator-mounted enclosure with flanged holes
• Connection Type: TV-style F coaxial connector
• Compatible Transmitters: LiftMaster Series 50, 60, and 80
• Use Case: Multi-door commercial and industrial systems
• Compliance: FCC certified for commercial use

Conclusion

The LiftMaster 423LM Three-Channel Coaxial Receiver delivers secure, reliable 390MHz control for multi-door and gate systems. With flexible programming and robust signal performance, it provides professional-grade functionality ideal for commercial environments.