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Telephonic system
7.1 WIRING
To wire systems where the Video distributor and possibly the Video expander item 335925
will be used, we recommend using cable item 336900.
This cable has been designed for the Terraneo digital system and is made up of 3 pairs of
individually twisted conductors for the signals and 2 conductors for the low-voltage power
supply of the devices.
7
INSTALLATION
Features
- Power supply conductors: 1.5 mm
2
Cu
- Signal conductors: 0.35 mm
2
Cu
- Insulation resistance: 0.012 MW/km
- Minimum radius of curvature: 100 mm
- Test voltage: 1500V a.c. for one minute
- Operating temperature: -10
°
C + 70
°
C
- Sheath-cutter wire
- Green sheath external diameter 9.5 mm
±
0.15
mm in PVC (standard CEI 20-22 II).
On the cable there is a size indicator with metric
progression.
The 3 pairs were twisted with different pitches to
optimise the transmission of the individual signals.
The colour-function reference indicated at the side
and on the diagrams should thus be respected.
7.2 MAXIMUM DISTANCE BETWEEN DEVICES
When making the systems the maximum distances given in the table below must be respected.
The distances indicated refer to the use of cable item 336900.
54
1 2
4
3
5 6
8
7
1
2
Blue-
Red
+
White-Orange
Orange
White-Brown
3
4
5
6
Brown
Audio
Bus
Power
supply
White-Green
7
8
Green
Video
MAXIMUM DISTANCE BETWEEN THE DEVICES WITH CABLE item 336900
MAXIMUM VALUE
From the Video Distributor
From the Video Distributor
From the Video Distributor
From the analog
or digital riser OS
to the video telephone door entry IS
to the dedicated OS or extra cameras
to the (IS) outputs on the floor distribution
blocks in the analog and digital systems
to the IN input on the floor distribution
blocks in the analog and digital systems
200 metres
200 metres
50 metres
200 metres
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