Interlogix Concord Express Installation Manual - Manual (Page 22)

Chapter 1
16 Concord Express Installation Instructions
Note
: When using 2-wire smoke detectors on Zone 6, the Two-Wire Smoke
setting (in program mode) must be turned on before entering the LEARN
SENSORS menu. See ONBOARD OPTIONS—INPUTS in the section “Entering
programming mode” on page 28 for complete details.
WARNING:
Use only 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.
When set up for 2-wire smoke detectors, zone 6 can handle up to 10 smoke
detectors with 120 µA maximum idle current per detector. Maximum total loop
current allowed in an alarm condition is 80 mA. The maximum loop resistance for
2-wire smoke detectors connected to zone input 6 is 10 ohms, plus the 2k end-
of-line resistor.
Caution:
Panel terminal 16 (ZCOM/2W-) cannot be used as a common
loopconnection for any other zones, when using Zone 6 for 2-wire smoke
detectors.
Connect one or more 2-wire smoke detectors to the panel as shown in Figure 10
below.
Figure 10: Connecting 2-wire smoke detectors
Connecting 4-Wire Smoke Detectors
Zone inputs 1 through 6 can be used with 4-wire smoke detectors that latch and
remain in the alarm state until power is removed and then restored to the
detector.