BASIC SYSTEM DIAGRAMS
28
−−−−
sec.1e
DOOR PHONE - VIDEO DOOR PHONE SYSTEMS: Installation Diagrams
DOOR PHONE SYSTEMS
SV102-2978C
EXAMPLE OF SIGNAL A, SIGNAL B AND POWER (R1, R2) DISTRIBUTION ON
SEVERAL COLUMNS
955/40
R1
AB R1R2
R2AB R1
R2
B
A
B
A
R2
R1
B
A
R2
R1
B
A
R2
R1
I
II
IV
III
R1
AB R1R2
R2AB R1
R2
B
A
B
A
R2
R1
B
A
R2
R1
B
A
R2
R1
I
II
IV
III
R1
AB
R2
B
A
B
A
R2
R1
B
A
R2
R1
B
A
R2
R1
I
II
IV
III
R2 R1
ABR1R2
R1R2
R1
AB R2R1
R2AB R1
R2
A
B
B
A
R2
R1
B
A
R2
R1
B
A
R2
R1
Input
III
IV
III
2 x 82Ohm 1/4W
2 x 82Ohm 1/4W2 x 82Ohm 1/4W
R1
AB
R2
B
A
B
A
R2
R1
B
A
R2
R1
B
A
R2
R1
I
II
IV
III
R1 R2
ABR1R2
TC
Output
Input
VIDEO
DISTRIBUTOR
Ref.955/40
Output
Input
VIDEO
DISTRIBUTOR
Ref.955/40
Output
Input
VIDEO
DISTRIBUTOR
Ref.955/40
Output
Input
VIDEO
DISTRIBUTOR
Ref.955/40
Output
VIDEO
POWER SUPPLY
VIDEO OUTDOOR
TO THE
FOLLOWING
COLUMN
TO THE
FOLLOWING
COLUMN
The video power unit Ref. 789/5B can power up to 8 video distributors Ref. 955/40 if Atlantico, or
Scaitel monitors are not installed in parallel in the system.
The closing resistors must not be present on the video door phone brackets.
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