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Post March 2014 Loop Card
Loop circuit design
It is important that redundancy is built into the system to
accommodate for future expansions and change of area usage in the
protected premises.
The number of devices on a loop circuit can be limited by the total number of
addresses available, the electrical load on the circuit, the maximum cable length and
other geographical considerations.
A loop circuit must not cover more than 10,000m
2
of
fl
oor area of a protected site
In total a maximum of 200 devices are allowed per loop circuit
.
Loop Card
Post March 2014 Loop Card
The panel is supplied with one Post March 2014 Loop Card (VIG-LPC-EN). If more
than one loop is required then acquire additional card for each additional loop.
Condition of use
The Loop Card (VIG-LPC-EN) must never be
fi
tted as a replacement
card in a Vigilon panel where 3400 devices are installed on its loop
circuits.
Up to 2Km loop length is possible with S4 and S3 Mark 2 devices installed on a
loop circuit. In this case a rough method for calculating the loop load and loop cable
length is shown in the lea
fl
et for the loop card. For a precise loop load and battery
standby calculation use the ‘Battery Standby and Loop load calculator’ tool.
Up to 1Km loop length is possible with 34000 devices or a mix of 34000, S4 and S3
devices installed on a loop circuit. Again for precise loop load and battery standby
calculation use the ‘Battery Standby and Loop load calculator’ tool.
Battery Standby and Loop load calculator tool
The ‘Battery standby and loop load calculator’ tool can be downloaded from
www.gentexpert.co.uk website by registered users.
Loop Cable length
The loop cable length is de
fi
ned as the sum of the length of cable used on the main
loop plus that used on all the spur circuits off the main loop having system devices.
Loop device load and length calculations for 2Km loop card
There can be up to 200 devices on a loop cable of up to 2Km length when using
Loop Card (VIG-LPC-EN), where both device count and cable length are dictated by
the number of alarm devices on the loop and how they are positioned, distributed or
lumped together.
