Figure 3-10: 2-Wire Smoke Detector On Zone 1 - Honeywell VISTA-128BPT Installation And Setup Manual

Using 2-Wire Smoke Detectors on Zone 1
Zone 1 can support up to 16 2-wire smoke detectors.
The alarm current on zone 1 supports only one smoke detector in the alarmed state.
Compatible 2-Wire Smoke Detectors
DETECTOR TYPE
Photoelectric, direct-wire
Photoelectric w/heat sensor, direct-wire
Ionization w/B401B base
Photoelectric duct detect (DH400 base)
Ionization duct detector (DH400 base)
Ionization, direct-wire
Photoelectric w/B110LP base
These smoke detectors are UL Listed for use with the VISTA-128BPT/VISTA-250BPT and are the only 2-wire
U L
smoke detectors that may be used.
Wiring 2-Wire Smoke Detectors to Zone 1
2K EOL resistors must be used on fire zones and must be connected across the loop wires of each zone at the
last detector.
To wire 2-wire smoke detectors to zone 1, perform the following steps:
Step Action
1 Select up to 16 2-wire smoke detectors from the list of compatible detectors.
2 Connect 2-wire smoke detectors across zone 1 terminals (10 and 11) as shown in Figure 3-10. Observe proper
polarity when connecting the detectors.
3 Connect the EOL resistor at the last detector in the loop across the zone 1 terminals. The EOL resistor
must be connected across the loop wires at the last detector.
Using 4-Wire Smoke Detectors on Zones 1 – 8
You may use as many 4-wire smoke detectors as can be powered from the panel's Auxiliary Power output without
exceeding the output's rating (750mA).
• NFPA limits the number of 4-wire smoke detectors to 18 per zone.
• Auxiliary power to 4-wire smoke detectors is not automatically reset after an alarm, and therefore must be
momentarily interrupted using either the J7 smoke detector reset output trigger or a 4204 Relay Module.
Compatible 4-Wire Smoke Detectors
Use any UL Listed 4-wire smoke detector that is rated for 10-14VDC operation and that has alarm reset time not
exceeding 6 seconds. Some compatible 4-wire smoke detectors are listed below.
Detector Type
Photoelectric, direct wire
Photoelectric w/heat sensor, direct wire
(+)
2-WIRE SMOKE
DETECTOR
(-)

Figure 3-10: 2-Wire Smoke Detector on Zone 1

Detector Model #
System Sensor 4W-B
System Sensor 4WT-B
Section 3 – Installing the Control
DEVICE MODEL #
System Sensor 2W-B
System Sensor 2WT-B
System Sensor 1451
System Sensor 2451
System Sensor 1451DH
System Sensor 1100
System Sensor 2151
(+)
10
11 (-)
3-9