35
Vigilon fire system
Fibre network connections
C 8 7 6 5 4 3 2 1
BACKPLANE
Control Panel
Side 1
(End 1)
P7
Rx
P4
Tx
P6
Rx
P5
Tx
P3
P2
Links P2 and P3 are booster links.
Normally the links are not fitted, however for
distance exceeding 750m the links must be fitted.
Rx
Tx
C 8 7 6 5 4 3 2 1
BACKPLANE
Control Panel
P7
Rx
P4
Tx
P6
Rx
P5
Tx
P3
P2
Rx
Tx
Side 2
(End 2)
Side 1
(End 1)
Side 2
(End 2)
Network cable screen continuity
These split cables
Panel 1
Panel 2
Panel Earth
Screen continuity
connection at the joint
NOTE:
the joint
Panel 2.
The cable screens are not
connected to earth
at
or at
THE JOINT
Ensure a good screen continuity joint exists where there is a split cable.
DO NOT mix cables of different types on the same leg of a network,
as this will create impedance imbalance and disruption to data
communication.
How to minimise cross talk
When using standard MICC cable in a network the different legs of
the cable must not be closely placed together, as this will cause
signal crosstalk which results in communication failure.
There are three practical ways of overcoming the crosstalk problem:
use a twisted-core MICC cable
put a ferrous screen between the cables (ie in the two runs of steel conduit)
maintain a distance between the network cables of at least 50mm