aiphone, selective contacts, door release, aiphone intercom The LEF-3L is a compact, wall or desk mount master station able to selectively release a door or call up a camera. This 3-call master station can activate door strikes or maglocks, control external devices, call up CCTV cameras, turn on lights, or control other devices that are triggered by a relay. The control corresponds to the station where communication is established. The LEF-3L can be used with any LE- or LS-series remote station, communication can be established with each station by selecting the channel on the master station. While the channel is selected, pressing the door release button (left of TALK button) will release only the associated door. When used for camera call-up, a relay closure will be maintained as long as a station is selected. A relay (RY-PA) is required for each external device, and can be connected to provide a momentary or maintained closure. The RY-PA has a “normally open” output, but can be modified to “normally closed”. The system can have up to four stations, in any combination of masters or door stations (e.g. 2 masters and 2 doors). Master-to-master communication is also a standard feature. (If communication between masters is not required, multiple LEF-3L's can be used to talk to 3 door stations.


  • Intermixable - any number of masters and remotes up to 4 total locations
  • Selective door release, activating the door strike associated with the door where communication is established
  • Press-to-talk communication at initiating master. Hands free reply from remotes or responding master
  • Desk or wall mount
  • Use QuikSpec to design this system
  • Compatible with LE- or LS-series door stations

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.

System Layout:

aiphone, selective contacts, door release, aiphone intercom