Specialized Zone Wiring; Programmable Output Wiring; Aml Device Wiring - DSC Maxsys PC4020 Installation Manual

Resistors should always be placed at the device end of
the wire run.
NOTE: Only normally closed detection devices can be
used with this type of zone supervision. Only one nor-
mally closed contact can be connected to each zone;
multiple detection devices/ ontacts on one loop are not
allowed, the tamper condition will not be monitored.

2.7 Specialized Zone Wiring

Some zones require wiring configurations unique to the
selected zone type. These zones are listed below. For infor-
mation regarding the various zone types, please see 5.4
'Zone Programming'.
Fire Zone
This zone type uses normally open contacts. The zone will
initiate a fire alarm when the loop is shorted (contacts
close). A Fire Zone trouble will be generated when the loop
is opened (wire break). Typically, fire alarm initiating con-
tacts originate from 4-wire smoke detectors. These types of
detectors must be wired as shown in the diagram below.
The power for the 4-wire detectors must be supervised
with an end-of-line relay (RM-1). The contacts of that relay
are wired in series with the zone end-of-line resistor. With
the relay energized, the relay contacts are closed and the
zone is normal. If the power is lost, the relay de-energizes,
the contacts open and a zone trouble is initiated.
Multiple fire initiating normally open contacts may be
used in parallel on the loop. Do not include burglary or
other types of devices on a fire zone.
NOTE: Minimum 18 AWG wire is required for Listed
Residential Fire Alarm Systems.
Keyswitch Zone
Zones programmed as keyswitch arming zones must be
wired according to one the following diagrams:
I n s t a l l a t i o n
LINKS Supervisory Zone
This zone is for use with a LINKS1000/LINKS2150/
LINKS2450 only. If the LINKS experiences a trouble condi-
tion, a LINKS output can be used to violate this zone type
and the event will be reported to the central station.
See the corresponding LINKS Installation Manual for wir-
ing information.
LINKS Answer Zone
This zone is for use with a LINKS1000 only. In case of a tele-
phone line failure, the panel can be uploaded/downloaded
via the cellular network. If the LINKS detects an incoming
call, it will activate an output that can be used to violate this
zone type. This will force the panel to answer the cellular
call and will begin communications with the downloading
computer. This zone must be programmed as LINKS
Answer and wired according to the following diagram:
AC Delay Zone
This zone is for use with a LINKS1000. If the LINKS expe-
riences an AC trouble condition, a LINKS output can be
used to violate this zone type and the event will be
reported to the central station.
See the corresponding LINKS Installation Manual for wir-
ing information.
2.8 Programmable Output
Wiring
The PGM output is a program-
mable terminal and will connect
to +12V when activated. The ter-
minal can source a maximum
current of 50mA. If the desired
current is higher than 50mA, a
relay will be required. To con-
nect the relay, refer to the above diagram. Each output can
be programmed as one of numerous available output
options. See 11.3 'Programmable Output Options' for a
complete list of PGM output options.

2.9 AML Device Wiring

Addressable Multiplex Loop (AML) devices use a 2-wire
connection for power and to communicate to and from the
control panel. All detectors are designed for low power
consumption to make for an efficient system.
The system can accommodate up to 128 addressable
devices. Connect the addressable loop to PGM1 and/or
PGM2, when programmed for AML operation. If only one
loop is used, then all 128 devices can be on the loop. If both
PGM1 and PGM2 are used, the 128 devices can be divided
between the two in any ratio that suits the application.
For instructions on configuring PGM1/PGM2 for AML
operation, and for AML device enrollment, see 4.4 'Enroll-
ing AML Devices'.
NOTE: The panel must be powered down when adding
or removing devices from the AMLbus.
a n d W i r i n g
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