Section 2: Installation And Wiring; Planning The System; Terminal Descriptions - DSC MAXSYS PC4020 Installation Manual

S e ction 2: Installa t i o n an d Wi r i ng

2.1 Planning the System

The speed and efficiency of installing a MAXSYS system
will be greatly enhanced by planning the installation. As
a minimum, the following checklist should be used to
ensure that all of the details have been considered:
Draw a diagram of the installation showing the
location of the main panel, all keypads, all zone
inputs, all bell outputs, all relay outputs and all
annunciators.
Indicate all partitions on the diagram. Decide which
zones, bell and relay outputs, keypads and remote
annunciators belong to each partition.
Determine where each system module is going to be
located and how far each module will be from the
main panel.
Determine the current draw on the main panel and
each system component used to ensure the system
requirements can be met (see Section 2.3 "Current
Ratings – Alarm Control Panel and Modules"). Cal-
culate each wire run using the Combus wiring
guidelines. Determine which wire gauge should be
used and where to place PC4204 modules to re-
power the Combus.
For Addressable devices, determine where each
device is to be located and consult the Addressable
Loop wiring guidelines to determine wire gauge
and wiring lengths (see Section 2.8 "AML Device
Wiring").
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2.2 Terminal Descriptions

The following terminals appear on the PC4020 Alarm
Control Panel:
Terminals Description
Red and Battery Connection. WARNING: Do not
Black Leads connect the battery or transformer
until all other wiring is complete.
AC Power Terminals. WARNING: Connect
the battery before connecting the
AC. Do not connect the battery or
transformer until all other wiring is
complete.
AUX+ and Auxiliary Power, 500mA MAX
AUX-
SAUX+ Switched Auxiliary Power, 300mA MAX
BELL+ and Bell/Siren Power. These terminals are
BELL- used for powering bells, sirens or other
devices requiring steady output voltage
on alarm; 700mA MAX
PGM1 and Programmable Output Terminals.
PGM2 50mA MAX (standard output) or
170mA MAX (addressable loop)
RED, BLK, Combus Terminals. The Combus is used
YEL, GRN by the panel and the modules to commu-
nicate with each other. RED and BLK are
used for power, and YEL and GRN for
data. NOTE: The four Combus termi-
nals of the main panel must be con-
nected to the four Combus terminals
or wires of all modules. For instruc-
tions regarding Combus wiring, refer
to Section 2.4 "Combus Operation
and Wiring."
Z1 to Z16 Zone Input Terminals. Zone inputs Z1 to
Z16 are provided for wiring zones on the
alarm control panel
TIP, RING, Telephone Line Terminals
T1, R1
EGND Earth Ground Connection. A ground con-
nection assembly is included with the
control panel. Please refer to the control
panel wiring diagram for instructions on
how to wire the ground connection.