53
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 sprinklers. (Ref: NFPA 72 / 3-8.6)
Fire Supervisory Operation
When the panel detects an Off-Normal Supervisory condition the
keypad buzzer sounds steadily (not pulsing), and the panel com
-
municates 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, however, 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.
18.7 PC4701 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 indi-
cated as a Zone Trouble
• Ground Fault: resistance < 40k to earth ground indicated 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 Water-
flow 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 initi
-
ating devices may be connected to a single 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 indi-
cated as a Zone Trouble
• Ground Fault: resistance < 40k to earth ground indicated as
a Common Ground Fault Trouble.
The Waterflow Delay can be programmed for the PC4701 Water-
flow zone.
18.8 4-Wire Smoke Detector Zones
All 128 zones can be programmed for 4-wire smoke detectors. It
is always an end-of-line resistor type with normally open alarm
contacts from the Fire initiating devices. Multiple contacts may be
connected in parallel on a single zone.
For commercial applications, zones used for 4-wire smoke detec-
tors 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-Verify Fire types.
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 dia
-
gram, see Appendix A-6 “Sensor Reset for 4-Wire Smoke Detec-
tors.”
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 detector 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 moni-
tors normally open contacts only (heat detectors, pullstations,
waterflow). An open on the loop initiates a trouble and a short ini
-
tiates an alarm.
The AMP-702 contains an internal tamper switch to monitor tam-
per 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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