Wiring 2-Wire Smoke Detectors To Zones 1 And 2 - ADEMCO VISTA-32FB Installation And Setup Manual

VISTA-32FB Installation and Set-Up Guide
The maximum zone resistance is 100 ohms for zones 1, 2, and 8, and 300 ohms for all other
zones (excluding the 2K EOL resistor).

Wiring 2-Wire Smoke Detectors to Zones 1 and 2

Zones 1 and 2 have the added capability of supporting 2-wire smoke detectors. Each zone
provides enough standby current (2mA) to power up to sixteen of the smoke detectors listed
below. Each zone provides only enough alarm current (20mA) to power one smoke
detector in the alarmed state. When assigned zone type 9 or 16, the second entry of a
[User Code] + [OFF] sequence at a keypad will interrupt power to these zones to allow
detectors to be reset following an alarm.
1. Connect 2-wire smoke detectors across zone 1 and/or zone 2 terminals (15 through 18) as
shown in Figure 6-1. Observe proper polarity when connecting the detectors.
2. If EOL resistors are presently connected across zone 1 and zone 2 terminals, remove
them. The EOL resistors must be connected across the loop wires of each zone at the last
detector.
2K EOLR resistors must be used on fire zones (standard, discrete 2K EOL resistors may be used
on burglary and panic zones) and must be connected across the loop wires of each zone at the
last detector.
The alarm current provided by zones 1 and 2 will support only one smoke detector each in the
alarmed state.
6–2
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Figure 6-1: 2-Wire Smoke Detector Connected to Zone 1
[can also be connected to Zone 2, terminals 17(+) and 18(-)]
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