Installation And Wiring - DSC MAXSYS PC4020CF System Manual

INSTALLATION
AND WIRING
When designing a security system with the PC4020 that
will be larger than 16 zones or have two or more Partitions
it is best to first lay out the system on paper. This will help
determine the total number of zones, additional expansion
and power supply modules and other system elements
that may be needed.
When the location of all points of protection is known the
location of the zone expanders can be made. You will find
that working from a plan, a layout will reveal the most
economical use of system modules; two eight zone
expansion modules instead of one sixteen zone, for
example, can save long wire runs because of the location
of zones.
The plan will also enable you to make the most efficient
layout for the communications bus (COMBUS). This is the
four conductor cable which can be standard station wire
(four 22 AWG wires colour coded red, black , yellow and
green) to which all system modules are connected in
parallel. It is not necessary to run the COMBUS in shield
unless it is being run through an area of high electrical
noise.
The COMBUS may be up to 2,500 ft (750 m) from the main
board to the farthest module, with any number of modules
in between. More than one COMBUS of 2,500 ft (750 m)
can run from the PC4020.
Note: Do not use shielded cable for COMBUS wire
runs.
Suggested Wiring Procedure
The first step in designing a PC4020 installation is
developing a system layout on paper. Doing this will allow
you to work from a plan and help to avoid making
mistakes and make programming easier.
Creating a System Layout
1 Draw a rough sketch of the building(s) layout in the
installation including the interior walls. Indicate on the
diagram the location of the PC4020 main panel. The
panel should be in a dry, secure location close to a
non switched AC source, a ground connection and a
telephone line connection.
2 Indicate on the diagram the location of all zones as
well as the device required such as smoke detectors,
motion detectors, door contacts etc.
3 If using the PC4700 Fire Module, indicate on the
diagram the location of the smoke detectors which will
be 2 wire and the locations of the waterflow detector.
NOTE: The fire module is located in the Main
Cabinet with the control panel. Be sure to indicate
the location of the Bell output.
4 Zones may be grouped together into partitions.
5 The PC4700 Fire Module zones (2 wire smoke detector
6 Indicate each partition by boxing the area of the partition
7 Determine the number of keypads (LCD4500) required
8 Siren outputs can be programmed to activate if one or
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firealarmresources.com
Knowing the zone number of each zone will allow the
partition setup done without mistakes. Locate any zone
expansion modules (PC4108 or PC4116) required
close to groups of zones for easier wiring.
Decide on the order to enroll the expansion modules.
The first 16 zones (1 through 16) are on the main
panel. As each module is enrolled it will be assigned
in sequence the next available group of zones. If an 8
zone module (PC4108) was enrolled first, it would be
assigned zones 17 through 24. If then a 16 zone
expansion module (PC4116) is enrolled it would be
assigned zones 25 through 40.
Once the order to enroll the expansion modules has
been determined, number each zone accordingly.
loop and a 4 wire waterflow loop) are system zones
(zone which Belong to all partitions) a detector should
be place in each partition to allow for the most effective
use of the module.
on the diagram. From this diagram it can be quickly
determined which zones belong to that partition.
for each partition and their location on the system. The
maximum number of keypads on a system is 16. Each
keypad on the system assigned to a partition can only
be used to operate that partition. (EXCEPTION - A
System Master or a multi-partition access code can
access any partition that the code is assigned to from
any keypad). Indicate on the diagram the location and
the partition each keypad will be assigned to.
After the number of zones, keypads, and their
locations, expansion modules and separately
controlled systems (partitions) have been determined,
decide other modules required to complete the
installation.
more partition goes into alarm. The main panel
provides one output (The Main Bell Output).
Additional outputs can be obtained from the PC4204
power supply/relay output module(s). Each PC4204
module has 4 form "C" relays, the last 3 of which can
be used as any one of the 28 output options (See PGM
Output List). Indicate on the diagram the location of
each of the sirens, and the location of the PC4204
module(s).