Aiphone LEF Open Voice Intercoms

• Flexible system design, intermixing any number of masters and subs to the system's capacity
• Selective calling from any master, with hands free reply from sub or responding master.
• Room monitoring from a master station.
• PanTilt video door answering can be added.
• Selective door release (LEF-5, 10 and 10S), with RY-PA relays.
• All Call (LEF-10S), door chime and background music input with BG-10C and PS-1225UL.
• Use QuikSpec to design this system.
• Troubleshooting FAQ's for the LEF System
• Literature Available

Power Source	12V DC, 300mA per station. *Use PS-1225UL power supply.
Communication	Subs call in with call tone and LED, 20 sec. Depress station button with lit LED. Press to talk, hands free reply. No LED annunciation between masters. Hands free reply from responding master. *800mW receive at 20ohms. 500mW transmit at 20ohms.
Door Release Button Contact	30V DC, 0.1A (resistance load).
Selector Switch Contact	12V DC, 300mA.
Wiring	Use shielded multi-conductor wire, not twisted pairs. 2 conductors per sub, homerun (single master system), or 3 conductors per sub (multi-master system). (Use Aiphone #822202 or #822203.) LEF-3 requires 9 conductors between masters. (Use Aiphone #822210.) LEF-5 requires 12 conductors between masters (plus up to 5 for video/door release controls). (Use Aiphone #822212 or greater.) LEF-10 requires 17 conductors between masters (plus up to 10 for video/door release controls). (Use Aiphone #822220.) LEF-10S requires 20 conductors between masters (plus up to 20 for video/door release controls). (Use Aiphone #822220.)
Distance	650' with 22AWG, 1600' with 18AWG.