Bay Alarm Vista-20Bay, Installation And Setup Manual

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Section 4 - Basic Hardwired Zones
4–3
Wiring 4-Wire Smoke/Combustion Detectors on Zones 2-7
The system supports as many 4-wire detectors as can be powered from Auxiliary Power on
the control on zones 2-7. Refer to the detector’s instructions for complete details regarding
proper installation and operation.
1. Connect 12-volt power for the detectors from Auxiliary Power terminals 4 and 5 (which
will interrupt power for fire alarm reset). Observe proper polarity when connecting
detectors.
2. Connect detectors (including heat detectors, if used) across terminals of the zone selected
(zones 2-7 may be used). All detectors must be wired in parallel.
Remove 2000 ohm EOL resistor if connected across the selected zone terminals. You must
connect the EOL resistor across the loop wires at the last detector.
To supervise power, we recommend the use of a System Sensor No. A77-716B Supervisory
Module.
Compatible 4-Wire Smoke/Combustion Detectors
1412 System Sensor, 4-wire ionization products of combustion
detector
2412 System Sensor, 4-wire photoelectric smoke detector
2412TH System Sensor, 4-wire photoelectric smoke detector w/135
°
F (57
°
C) heat detector
A77716B System Sensor, EOL relay module (supervisory module for
wired 4-wire fire zone)
2112/24T System Sensor , low-profile 4-wire photoelectric smoke
detector w/135
°
F (57
°
C) heat detector
+
+
_
2000
OHMS
EOLR
HEAT
DETECTOR
HEAT
DETECTOR
ZONES 2 - 7*
RED
EOL
POWER
SUPERVISION
RELAY MODULE
A77-716B
VIOLET
4-WIRE SMOKE
OR COMBUSTION
DETECTORS
* IF PROGRAMMED FOR FIRE
TO HI SIDE OF
SELECTED
TO LO SIDE OF
SELECTED
AUX PWR
OUTPUT
TERMINALS
5
4
_
+
+
_
BLK
_
_
+
Figure 9. 4-Wire Smoke Detector Connections (Zones 2-7)
UL
4-Wire Smoke Detectors are NOT approved for use in UL installations.