
BASIC SYSTEM DIAGRAMS
50
−−−−
sec.1d
DOOR PHONE - VIDEO DOOR PHONE SYSTEMS: Installation Diagrams
DOOR PHONE SYSTEMS
EXAMPLES OF COAXIAL CABLE CONNECTION
TC
TC TC
Video power unit Ref. 789/5B can power up to 10
video distributors Ref. 1794/4A if Atlantico, or Scaitel
video door phones are not connected in parallel. Use
two additional wires in the system and other power
units Ref. 789/2 (one for each next group of 20) to
install more distributors.
With distributor in which the U5 output is used it is
necessary to remove the 75 Ohm resistance
(mounted raised from the PCB) .
ONE RISER
SERIES CONNECTION
The cable goes in and
es out from each video door phone
CONNECTION WITH DISTRIBUTION
TO THE FLOORS
CONNECTION WITH DISTRIBUTION AT RISER BEGINNING
In each riser the cable goes in and
comes out from each video door phone
SEVERAL RISER
Power supply
Ref.789/5B
(Max. 10
distributors)
Power supply
Ref.789/5B
(Max. 10
distributors)
Note: if on the video door phone terminals V4 and
V5 there is not the coaxial cable connect the
75Ω 1/4W resistance.
SV102-3294
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