ADEMCO Vista-128FB Guia de preparacion Pagina 31

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Section 3 - Installing the Control
3-9
-
+
-
+
-
+
EOL POWER
SUPERVISION
RELAY MODULE
A77-761B
4-WIRE SMOKE
DETECTORS
2000
OHM
EOLR
TO FIRE ZONE
TERMINALS
HEAT
DETECTOR
+
SHOWN POWERED.
RELAY OPENS WHEN
POWER IS LOST
333PRM-003-V0
POWER
SUPPLY
333 PRM
7
6
5
4
3
+
-2
+1
8
JUMPER
P1
USE A 12VDC,
BATTERY-BACKED,
UL LISTED POWER
SUPPLY.
JUMPER P1 ON
333 MODULE
MUST BE IN
"B" POSITION
FOUR-WIRE DETECTOR CIRCUIT
4204
CONTROL PANEL
234 112
76 4
Figure 3-12c: Wiring a 333PRM using a 4204 and a Power Supply
Using 2-Wire Latching Glassbreaks on Zone 8
Zone 8 can support 2-wire glassbreak detectors. The
zone provides enough standby current to power up to
50 2-wire glassbreak detectors meeting the
requirements listed below.
Compatible Glassbreak Detectors
Use detectors that meet the following ratings:
Standby
Voltage:
5VDC13.8VDC
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:
2mA10mA
Reset Time:
Less than 6 seconds
NOTES:
You can use detectors that exceed 1.1k ohms in
alarm, provided they maintain a voltage drop of
less than 3.8 volts in alarm.
The ADEMCO ASC-SS1 detector has been tested
and found to be compatible with these ratings.
21
22
GLASSBREAK
DETECTOR
ZONE 8
(+)
(-)
LATCHING TYPE GLASS
BREAK DETECTOR LOOP
2000
OHMS
EOLR
Figure 3-13: Wiring Latching Glassbreaks to Zone
8
The alarm current provided by zone 8
supports only one glassbreak detector in the
alarmed state.
Do not use other contacts when using
glassbreak detectors on zone 8. Other
contacts may prevent proper glassbreak
detector operation.
To wire 2-wire latching glassbreak detectors to zone 8,
perform the following steps:
Step Action
1 Select 2-wire glassbreak detectors that meet
the requirements stated previously.
2 Connect detectors across zone 8 (terminals
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