Connecting 2-Wire Smoke Detectors - GE Concord 4 Series Installation Instructions Manual

Note
The Two-Wire Smoke set-
ting (in program mode) must
be on when using 4-wire
smoke detectors as shown
in Figure 8. See
ONBOARD
— in the sec-
OPTIONS INPUTS
tion "Programming the
Panel" for complete details.
Concord 4 Series Systems
Panel Terminals
G N D Z O N E 1 Z O N E 2
1 3 1 4 1 5
Normally
Closed
(N/C)
Contacts
In Series
Contacts in
2k Ohm EOL
Resistor 49-454
2k Ohm EOL
Resistor 49-454
Figure 7. Connecting N/C and N/O Intrusion Detection and Motion Detector Circuits to the Panel

Connecting 2-Wire Smoke Detectors

Zone input 8 can be set up (in program mode) to accept the following 12 VDC, 2-wire smoke
detectors:
• System Sensor models 2400, 2400TH
• 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 20 smoke detectors (all of the
same model, as listed above) with 120 uA maximum idle current per detector. Maximum total
loop current allowed in an alarm condition is 90 mA. Connect one or more, 2-wire smoke detec-
tors to the panel as shown in Figure 8.
2-Wire
2 W S M K
G N D Z O N E 7 Z O N E 8
2 3 2 4
2 2
-
-
2k Ohm EOL
Resistor 49-454
(Locate at Last Detector)
Figure 8. Connecting 2 and 4-Wire Smoke Detectors to the Panel
WWW.DIYALARMFORUM.COM
G N D Z O N E 3
1 6 1 7
Normally
Open (N/O)
Parallel
+
+
G N D Z O N E 5
+ 1 2 V
1 1 1 9 2 0
Motion
Detector
-
+
L P L N
2k Ohm EOL Resistor 49-454
(Locate at Sensor)
4-Wire
2 W S M K
G N D Z O N E 7 Z O N E 8
2 2 2 3 2 4
C C
O O N N
. . . . . . . .
+ - -
+
M M O O
Model
449AT
C C
O O N N
. . . . . . . .
+ + - -
M M O O
2k Ohm EOL
Resistor 49-454
(Locate at Last Detector)
12