VISTA-20BAY Installation & Setup Guide
4–4
Wiring 2-Wire Latching Glassbreak Detectors on Zone 8
Use zone 8 for connection of compatible 2-wire latching-type glassbreak detectors. Connect
all detectors in parallel across zone 8 (terminals 19 and 20).
After an alarm, the first code + OFF turns off the siren and disarms the system; the second
code + OFF clears the memory of alarm and resets the glassbreak detector.
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.
19
20
( + )
( - )
2000
OHMS
EOLR
GLASSBREAK
DETECTOR
LATCHING TYPE GLASS
BREAK DETECTOR LOOP
ZONE 8
Figure 10. Glassbreak Detector Connections to Zone 8
Compatible Glassbreak Detectors
Use detectors that meet the following ratings:
Standby Voltage:
5VDC-13.8VDC
Standby Resistance:
Greater than 20k ohms (equivalent
resistance of all detectors in parallel)
Alarm Resistance:
Less than 1.1k ohms (see note below)
Alarm Current:
2mA-10mA
Reset Time:
Less than 6 seconds
The IEI 735L Series Detectors have been tested and found to be compatible with these
ratings. You can use up to fifty IEI 735L Detectors, connected in parallel.
You should note that only one detector in the alarmed state can be supported by the alarm current
provided by zone 8.
You can use detectors that exceed 1.1k ohms in alarm, provided they maintain a voltage drop
in alarm of less than 3.8 volts.
Do not use other N.O. or N.C. contacts when using glassbreak detectors on zone 8. Other
contacts may prevent proper glassbreak detector operation.
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