Installation Diagrams - Farfisa Si 5050 Technical Manual

Working diagrams
EXTENSION OF VIDEO INTERCOM SYSTEM
All installation diagrams in this technical manual we have used only
one monitor for each user. It is possible to "personalise" the installa-
tion, by matching properly to the "base" diagrams of pages 31, 33, 35,
37, 39, 41, 43, the applications on the following pages (50 to 54). Such
examples refer to applications with a one video-intercom entrance. To
plan systems with 2 or more audio-video entrances, and if more than
one control switch-ON is needed, use the first buttons of monitor (P1,
P2 or T1, T2, etc.), by making the terminals for intercommunicating
calls slide on to the lower ones (P3, P4 or T3, T4).
In the "base" diagrams the dashed lines identify the wires for control
switch-ON, whereas in the "additional" diagrams the dashed lines
refer to the wires for intercommunicating service.
When the simultaneous switch-ON of several monitors is needed,
and extra power supplies are to be added, take care that terminal I of
timer 1382 can be connected to a maximum of 3 power supplies
1281.
Extension of a ONE-WAY system
To plan a one-way system with several monitors and/or parallel
intercoms and with or without intercommunicating service, pro-
ceed as follows.
- make a photocopy of the "additional" diagram desired, selecting it
between those of pages 50, 51, 52, 53;
- cut vertically the diagram in correspondence to the arrow
- put the diagram on the "base" diagram, so as to cover the existing
monitor, then line up the wires of the 2 diagrams;
- if specified in the "additional" diagram, connect the I and A wires to
the terminals of article 1382;
- to obtain the intercommunicating service, make the connections
which have been drawn with a dashed line.
Example: by making a photocopy of the "additional" diagram of page
50 (3 parallel monitors), then applying it on to the installation diagram
of page 39 (Si 5250), and lining it up to the riser wires, it is possible
to obtain a one-way system, with 3 parallel monitors connected to 2
external video stations.
To P3 terminal
48
(GB- '99)
;