[8] FIELD WIRING INSTALLATION GUIDELINES
All wiring must be installed in compliance with the National Electrical Code
and the local codes having jurisdiction. Proper wire gauges should be used. The
conductors used to connect smoke detectors to control panels and accessory de-
vices should be color-coded to prevent wiring mistakes. Improper connections
can prevent a system from responding properly in the event of a fire.
For signal wiring, (wiring between interconnected detectors or from detectors to
auxiliary devices), it is recommended that single conductor wire be no smaller
than 18 AWG (0.82 mm²).
Smoke detectors and alarm system control panels have specifications for al-
lowable loop resistance. Consult the control panel manufacturer’s specifications
for the total loop resistance allowed for the particular control panel being used
before wiring the detector loop.
[8.1] WIRING INSTRUCTIONS
The DSD240 detector is designed for easy wiring. The housing provides a termi-
nal strip with clamping plates. See
Figure 6
on page 4 for system wiring.
*Trouble is indicated when the Supervisory Relay, switches state-Terminals
3 and 14 are open in a Trouble Condition
Causes of a Trouble Condition may be:
• Unit loses Power
• Cover Tamper Feature times out
• When in “Standby” mode, the product goes into “Cover Tamper Violation”
if the cover has been removed or improperly replaced and remains so for
at least 7 minutes. As soon as the cover is properly reseated, the product
reverts to “Standby” automatically.
HIGH
LOW
9 VOLT
BATTERY
9 VOLT
BATTERY
9 VOLT
BATTERY
TO SAMPLING TUBE
TO EXHAUST TUBE
DIFFERENTIAL
PRESSURE
TRANSMITTER
MODEL #607-01
15 TO 36
VDC SUPPLY
1000 OHM 5%
1 WATT RESISTOR
VOLT METER FLUKE
MODEL 87 OR
EQUIVALENT
+
–
FIGURE 5. PROCEDURE FOR VERIFYING AIR FLOW LESS THAN 500 FPM:
H0163-01
FIGURE 6. SYSTEM WIRING DIAGRAM FOR 4-WIRE DUCT SMOKE DETECTORS:
CAUTION
Do not loop wire under terminals when wiring detectors. Break wire runs to provide system supervision of connections.
24VAC/DC
9
10
AUXILIARY CONTACTS
FOR FAN SHUTDOWN, ETC. (NOTE 2)
16
6
17
8
18
7
N.O.
C.
N.C.
N.O.
C.
N.C.
16
6
17
8
18
7
N.O.
C.
N.C.
N.O.
C.
N.C.
SUPERVISORY CONTACTS
(NOTE 3)
24V
9
10
AUXILIARY CONTACTS
FOR FAN SHUTDOWN, ETC. (NOTE 2)
SUPERVISORY CONTACTS
(NOTE 3)
SUP N.O.
SUP C
SUP C
SUP N.O.
4
5
ALARM
INITIATION
CONTACTS
(NOTE 4)
4
5
ALARM
INITIATION
CONTACTS
(NOTE 4)
ALARM
INITIATION
LOOP
UL/FM LISTED
4-WIRE
CONTROL PANEL
+
240
VAC
240
VAC
OR
OR
AUX A
AUX B
AUX A
AUX B
ALARM N.O.
ALARM N.O.
ALARM C
ALARM C
3
3
14
14
FIRST DETECTOR IN THE LOOP
POWER INPUTS (NOTE 1)
POWER INPUTS (NOTE 1)
LAST DETECTOR IN THE LOOP
EOL RESISTOR
SPECIFIED BY
PANEL
MANUFACTURER
NOTE 1:
24V Power Inputs accept 24VDC of either polarity or 24VAC 50-60Hz.
120VAC Power Inputs accept only 120VAC 50-60Hz. Connect power source to
appropriate terminals of each detector. See specifications for additional power
supply information.
NOTE 2:
Auxiliary contacts shown in standby position. Contacts switch during
alarm as indicated by arrows. Auxiliary contacts are not to be used for connec-
tion to the control panel. See specifications for contact ratings.
H0558-12
NOTE 3:
Supervisory contacts shown in standby position. Open contacts indi-
cate a trouble condition to the panel. See specifications for contact ratings.
NOTE 4:
Alarm Initiation contacts shown in standby position. Closed contacts
indicate an alarm condition to the panel. See specifications for contact ratings.
IN-GE-DSD240-01-01 4
I56-9200-001
5/6/2019
