53
expires will initiate an immediate Fire Alarm. In this case,
all Auto-Verify delays will be overridden.
18.6Fire Supervisory Zone
All 128 zones can be programmed for Fire Supervisory. This
zone is always an end-of-line resistor type with normally
open alarm contacts from the Fire Supervisory initiating
devices. A maximum of 20 Fire Supervisory devices can be
connected in parallel on a single zone.
The zone wiring is supervised by the control panel for:
• Short Circuit: Supervisory Off-Normal
• Open Circuit: loss of the end-of-line resistor and will be
indicated as a Zone Trouble
• Ground Fault: resistance < 40k
Ω
to earth ground indi-
cated as a Common Ground Fault Trouble.
A Fire Supervisory zone monitors fire critical systems to
indicate when those systems are in a condition that could
prevent normal operation. Most commonly monitored
devices are sprinkler gate valves to ensure they are not
closed thus preventing water from flowing to the sprin-
klers. (Ref: NFPA 72 / 3-8.6)
Fire Supervisory Operation
When the panel detects an Off-Normal Supervisory condi-
tion the keypad buzzer sounds steadily (not pulsing), and
the panel communicates the trouble to the central station.
Users can silence the keypad buzzer by entering an access
code at a system keypad. The Off-Normal condition, how-
ever, is a latching condition and can only be restored by a
Fire Reset. If the keypad buzzer is silenced, a subsequent
Off-Normal Supervisory condition will restart the buzzer.
NOTE: The maximum number of Supervisory devices per
zone is 20. Supervisory and Fire initiating devices cannot be
mixed on a Fire Supervisory zone.
18.7PC4701 Zones
PC4701 2-Wire Smoke
The 2-wire Smoke zone on the PC4701 module is the only
zone in the system that can have 2-wire smoke detectors as
Fire Alarm initiating devices. This zone is an end-of-line
resistor type and can accommodate up to 30 compatible 2-
wire smoke detectors. The zone is fixed as a 2-wire smoke
zone.
The PC4701 2-wire smoke zone can be programmed as an
Auto-Verify zone.
The zone wiring is supervised by the control panel for:
• Short Circuit: Fire Alarm
• Open Circuit: loss of the end-of-line resistor and will be
indicated as a Zone Trouble
• Ground Fault: resistance < 40k
Ω
to earth ground indi-
cated as a Common Ground Fault Trouble.
PC4701 Waterflow
The Waterflow zone on the PC4701 is a hard-coded for
waterflow operation and cannot be reprogrammed.
If waterflow zones are used on the PC4020CF, the PC4701
Waterflow zone must be used first. This zone is an end-of-
line resistor type with normally open alarm contacts from
the Waterflow Alarm initiating devices. As per NFPA, only
five Waterflow initiating devices may be connected to a sin-
gle zone.
The zone wiring is supervised by the control panel for:
• Short Circuit: Fire Alarm
• Open Circuit: loss of the end-of-line resistor and will be
indicated as a Zone Trouble
• Ground Fault: resistance < 40k
Ω
to earth ground indi-
cated as a Common Ground Fault Trouble.
The Waterflow Delay can be programmed for the PC4701
Wate rflow zon e.
18.8 4-Wire Smoke Detector Zones
All 128 zones can be programmed for 4-wire smoke detec-
tors. It is always an end-of-line resistor type with normally
open alarm contacts from the Fire initiating devices. Multi-
ple contacts may be connected in parallel on a single zone.
For commercial applications, zones used for 4-wire smoke
detectors may be programmed as Standard Fire or Auto-
Verify Fire zones. For residential applications, the zone may
be programmed as a Delayed Fire, Standard Fire or Auto-
Ve r ify F i r e t y pes.
Power for the 4-wire smoke detectors may be derived from
the switched auxiliary (SAUX+) output on the PC4020 main
panel. The devices may also be powered from the PC4204/
PC4204CXCF AUX output routed through one of the
relay’s NC contacts. Program the Relay as Sensor Reset. For
a wiring diagram, see Appendix A-6 “Sensor Reset for 4-
Wire Smoke Detectors.”
18.9 AMS-220 Addressable Smoke Detector
Zones
The addressable multiplex loop(s) (AML) can be used for
AMS-220/220T Addressable Smoke Detectors. Each detec-
tor will occupy one zone programmed for either Standard
Fire or Auto-Verify Fire. The 2-wire connection is used to
power the device and to communicate to and from the main
panel. The AMS-220 is a non-latching, self-restoring device.
The addressable loop(s) are supervised for missing devices
and by default will detect an open or short on the loop by
reporting one or more devices as missing. Ground fault on
the addressable loop wiring will be reported as a common
ground fault trouble.
18.10AMP-702 Addressable Fire Point Module
The AMP-702 contact uses a 2-wire connection for power
and to communicate with the control panel. This simplifies
wiring and reduces installation cost. The AMP-702’s low
current draw also maximized the number of devices that
can be attached to an addressable loop.
The AMP-702 has a single EOL 5.6K supervised input that
monitors normally open contacts only (heat detectors, pull-
stations, waterflow). An open on the loop initiates a trouble
and a short initiates an alarm.
The AMP-702 contains an internal tamper switch to moni-
tor tamper conditions.
Connection Diagram
Run the connection wires through the wiring holes on the
back of the unit.
NOTE: Fire and burglary initiating devices cannot be
mixed on the same addressable loop.
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