Bticino 2 WIRE VIDEO DOOR ENTRY AND HOME VIDEO SURVEILLANCE SYSTEM, Руководство по проектированию и установке, Страница: 68 / 174

GeneRAL RULes FoR InstALLAtIon
66
3
2
1
ON
346850 INT
EXT
ON OFF
ON
346850 INT
EXT
ON OFF
2
2
2
GENERAL RuLES FOR THE CALCuLATION OF DISTANCES
AuDIO OR VIDEO SYSTEM WITHOuT INTERFACES OR SYSTEM EXPANSION MODuLES
AuDIO OR VIDEO SYSTEM WITH APARTMENT INTERFACE, ITEM 346850
In video systems the max distance
between the EP and the furthest
handset is 600 m when the BTicino
cable 336904 and 2 interfaces 346850
and 346851 are used Interfaces
346850 and/or 346851 introduce a
galvanic separation of the system
In audio systems the max distance between the EP and the furthest
handset is 1 km when a sheathed cable
1 mm
2
is used If apartment interfaces
(346850) or system expansion modules
(346851) are included in the system,
the max distance can be extended
to 1350 m In order to calculate the
system max extensions, it is necessary
to identify the galvanically insulated
sections, as well as the A, B and C line
of each section The max permitted
distance must also be checked on the
table, based on the items installed and
the cable used Following are some
examples of how to identify the LINES
Last handset
LINE B * LINE C*
LINE A*
Power supply
Entrance panel
Audio
Swing
Last handset
or last apartment
interface 346850
Power supply
Entrance
panel
LINE
B
LINE
C
LINE
A
Power supply 346850
LINE A
LINE B LINE C
Galvanically
insulated
section
Galvanically
insulated
section
System performances - video system