aiphone, video door phone, video entry system, door entry system video The KB Video Door Phone series is one of the most flexible and sophisticated video entry systems on the market. The KB Series 3 x 5 Color Video Sentry series is a video entry system with capacity for three video door stations and up to five inside monitor/ handset stations. An audio-only door station can be substituted for the third video door and it can be expanded to control up to 3 entries from 5 monitors (KB-3MRD & KB-3HRD). The system has advanced features including TILT color cameras (KB-DAR), selective or All Call intercom, audio sub station (KB-3SD) in place of monitor (max. 2 pcs), optional audio door at 3rd entry and door release control at all entries. In addition, a number of optional accessories are available, like picture memory unit (mod. KC-32EU) and vandal proof housings for camera units (mod. BAIS3 & BAIE3). The video room stations are equipped with a 4" flat color monitor. Internal communication includes selective calling with hands free reply and All Call. Audio and video door monitoring can be done from any inside station. The video door station contains a CCD chip camera with illumination LEDs for low light applications. The camera is designed with a tilt feature that allows the viewer to adjust the camera's angle upwards. Incoming calls from a door station sound a 2, 4 or 8 stroke chime. The monitor(s) come on displaying the image of the caller. The person at the inside station picks up to answer, and the visitor speaks hands free. The entry area can be monitored (audio and video) by pressing the "monitor" button on any room station, staying on for approximately 2-1/2 minutes. The door release button can be used to activate an electric door strike. To selectively release the video doors, add the RY-3DL adapter. The system's installation is surprisingly simple, as it requires only 2 twisted pairs for all functions. Coaxial cable is NOT required.


  • Up to three video door stations (KB-DAR)
  • Up to five inside stations (KB-3MRD main room station and up to four KB-3HRD sub room stations)
  • Video images from door station(s) can be recorded with the KC-32EU (1 per video door station)
  • Selective calling and All Call between inside stations
  • Hands free Audio and Video monitoring
  • Compact surface mount color video door station (KB-DAR)
  • Adjust vertical angle of camera for better viewing
  • Illuminating LED's for low light conditions
  • Selectively release each door with adapter (RY-3DL)
  • Use the following cables only:
    • Aiphone 871802, West Penn D990
    • Atlas 202-18-1-2J

Power Source24V DC, supplied by PS-2420UL.
KB-3MRD: 860mA. 220mA standby.
KB-3HRD: 410mA. 80mA standby.
KB-3SD: 85mA. 50mA standby.
Use one PS-2420UL for every two monitors in the system.
Video Monitor4" TFT color LCD
Call-in from Door4-stroke chime from door #1, 2-stroke chime from door #2, fast 8-stroke chime from door #3 (audio/video or audio-only)
Internal CallingPre-tone then voice when making an All Call to inside stations.
Double pre-tone then voice when selectively calling an inside station. Hands free reply from responding station.
Night ViewingBuilt-in light is projected up to 12" from camera.
Outside area beyond 12" cannot be seen.
Door ReleaseContact rating: 12V AC, 400mA. (Single door release contact)
Selective door release with RY-3DL adapter
Wiring2 wires to door station, parallel, non-polarized, fire-rated. (Use Aiphone 871802, West Penn D990 or Atlas 202-18-1-2J wire only.)
2 wires between rooms, looped, plus a separately jacketed 2 conductor wire from power supply to each monitor, homerun. (Use West Penn D990 wire for video signal, plus separate 2 conductor wire for power to each monitor in the system.)
DistanceKB-3MRD to door: 650' with 18AWG.
KB-3MRD to IE/IF Door: 450' with 22AWG wire, 1,000' with 18AWG.
KB-3MRD to last KB-3HRD: 330' with 18AWG, Use West Penn D990 or Atlas 202-18-1-2J wire. Daisy-chain wire between monitors, and homerun additional separate pairs from power supplies to each monitor (2 monitors per PS-2420UL). With common power wires: Max. distance between monitors is 165' with 18AWG.

Communication Network & Wiring:
aiphone, video door phone, video entry system, door entry system video
System components
  • KB-DAR: Video door station
  • KB-3MRD: Master station
  • KB-3HRD: Sub master station (Max. 4 pcs)
  • KB-3SD: Sub master station (Audio only Max. 2 pcs)
  • 24V DC power supply: PS-24E
    • Install one or two KB-3SD in lieu of KB-3HRD sub master station. Wiring is exactly the same as on KB-3HRD.