Connecting 4-Wire Smoke Detectors - GE Interlogix Concord Security System Installation Instructions Manual

Note
The Two-Wire Smoke set-
ting (in program mode) must
be off when using 4-wire
smoke detectors. See
—
ONBOARD OPTIONS INPUTS
in the section "Programming
the Panel" for complete
details.
Note
Zone 8 must be learned into
sensor group 26 (fire) for
connected smoke detectors
to reset after canceling a fire
alarm.
13
• ESL models 429AT, 521B, 521BXT—(models 521B and 521BXT require the following dip
switch settings: 1-on, 2-off)
Use only the 2-wire smoke detector models described above. Alarm signals from other
!
detectors may not be processed correctly if the panel has lost AC power and is operating
only from the backup battery.
Caution
When set up for 2-wire smoke detectors, zone 8 can handle up to 10 smoke detectors with
120 uA maximum idle current per detector. Maximum total loop current allowed in an alarm con-
dition is 100 mA. Connect one or more, 2-wire smoke detectors to the panel as shown in
Figure 10.
2-Wire
+12V
Zone
8 2W SMK
Panel
22
23
Terminals
2k Ohm EOL
Resistor 49-454
(Locate at Last Detector)
Figure 10. Connecting 2 and 4-Wire Smoke Detectors to the Panel

Connecting 4-Wire Smoke Detectors

Zone input 8 can be used with 4-wire smoke detectors that latch and remain in the alarm state
until power is removed, then restored to the detector. The panel provides this power interruption
from terminal 23 (2-wire smoke power +), provided that zone 8 is learned into sensor group 26
(fire).
Table 5 describes the minimum available panel power. Use only 4-wire smoke detectors that
operate at these power limits. Connect up to five Sentrol (ESL) model 449AT (part no. 13-360)
smoke detectors to panel power and zone 8 input as shown in Figure 10.
Table 5: Panel Minimum Available Power
8.3 VDC, up to 30 mA total (combined alarm) current
8.1 VDC, up to 40 mA total (combined alarm) current
7.7 VDC, up to 60 mA total (combined alarm) current
7.4 VDC, up to 80 mA total (combined alarm) current
Min. Voltage/Max. Current Available
4-Wire
G N D Z O N E Z O N E + 1 2 V
7 8 2 W S M K
2 0 2 1 2 2 2 3
C C
O O N N
. . . . . . . .
+ - -
+
M O O
M
Model
449AT
C C
O O N N
. . . . . . . .
+ - -
+
M O O
M
Model
449AT
2k Ohm EOL
Resistor 49-454
(Locate at Last Detector)
Concord