tabellet Apartment Station 2-72 Way System
PD-307 Issue 2
Installation and Operating Manual
Page 10 of 48
Entrance Panel
– Important Note
Careful consideration should be given to the location of the entrance panel to ensure the
best possible lighting conditions for the camera. In general strong back lighting of the
subject (by the sun and sky) should be avoided, as the contrast between foreground and
background may be too great for the camera. The field of view should contain as little of
the sky as possible, particularly if south facing. If a backlit situation is unavoidable,
additional lighting may be necessary to illuminate the caller and avoid a dark outline image
(silhouette). A light coloured or reflective surface around the panel will redirect backlight to
illuminate the caller.
Door Controller
The door controller and power supply should be wall-mounted in a convenient cupboard or
other protected environment with available mains power. Cable length to the entrance
should be less than 50m. The door controller for the second and subsequent entrances
may be situated in the same location, or to meet the 50m requirement may be situated in
another location. Power supplies may be shared between door controllers placed in the
same location, but controllers in separate locations must be separately powered.
Video Controller
The video controller(s) and power supply(ies) should be wall-mounted in a convenient
cupboard or other protected environment with available mains power. Cable length to the
apartment station
should be less than 150m, see ‘Cable Distances’ page 14. In many
cases the video controllers will be in the same location as the door controller(s), but they
may be distributed as required to reduce wiring distances. When placed in different
locations, each location must have its own local power supplies.
Gate Controller
The gate switch controller BSSW is wired between the block door controllers and the video
controllers, so would normally be wall mounted next to a door controller.
For further details see the “bell
issimo
and Bellcall Manual Gate and Block (PD-
120)”.
Separately Powered Apartment Stations
The limitation of up to 4 apartment stations ringing but only one displaying, as indicated in
the power supply and cable distance tables on page 14, can be overcome by the use of
supplementary power from a 340C.
