3 Call Master with No Door Release

• Substation Setup: If using only sub-stations that communicate back to a master station, a simple two-pair wiring configuration is sufficient.
• Master Station Setup: For a system with multiple master stations that need to communicate with each other, a 12-conductor cable is required.
• Shielded Wire Recommended: To minimize interference and prevent unwanted noise pickup, shielded wiring is highly recommended.

A single 12V DC power supply (available in the Related Items section) powers the entire system.

Key Features:

• Supports up to three sub-stations
• Fully intermixable system with master and sub-stations
• LED annunciation and a momentary tone when a sub or door station calls
• Push-to-talk functionality at the calling master, with hands-free response at the receiving station
• All Call button (compatible with optional BG-10C) for system-wide communication
• Selective monitoring for enhanced control
• Privacy button to prevent unauthorized listening
• Video door entry integration capability
• Adjustable voice, music, and call tone volume
• Selective door release feature

Technical Specifications:

• Power Source: 12V DC, 30mA per station (requires PS-1225UL power supply)
• Output Power: 800mW @ 20 ohms (reception), 500mW @ 20 ohms (transmission)
• Communication: Press-to-talk and release-to-listen at master stations, hands-free response at sub-stations
• Talk Channel: Single talk path with an occupied LED indicator
• System Capacity: Up to six intermixable stations
• Wiring:
  • Master stations: 3 common wires plus 1 individual wire per station (looped)
  • Sub-stations: 2-wire homerun (single master system) or 2 common wires plus 1 individual wire per station (looped or homerun)
• Wiring Distance:
  • 650 feet with 22AWG wire
  • 1,600 feet with 18AWG wire
• Speaker Sensitivity: 40 dB
• Total Harmonic Distortion: Less than 5% at rated output
• Signal-to-Noise Ratio: 60 dB
• Frequency Response: -3 dB, 770-6800 Hz
• Dimensions: LEF-5C unit – 9-7/16" x 7-7/8" x 1-3/8"

The Aiphone LEF-5C is an ideal solution for clear and reliable communication in offices, warehouses, apartment buildings, and security applications.