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EXP-SD-SFC-120V-V1
Larson Electronics, LLC
Phone: (800) 369-6671
Fax: (903) 498-3364
www.larsonelectronics.com
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The EXP-SD-SFC-120V-V1 from Larson Electronics is an Explosion Proof Smoke Detector that is designed for combustible
facilities. This 120V AC smoke alarm contains three sets of relays, a magnetic test switch and an
L
ED indicator.
Constructed of polycarbonate/ABS and copper-free aluminum, the IP44 rated unit is compatible with ceiling mounting
applications.
This unit has a junction box with flying leads fed through a hub.
WIRING
The EXP-SD-SFC-120V-V1 contains terminals that accept 14-18 AWG shielded stranded copper wire during installation.
Operators may access a total of four, 3/4" NPT hubs to complete electrical connections.
Standard pigtail(flying leads) wiring
We strongly encourage a licensed electrician install this product
, in all locations especially in outdoor areas
where weatherproofing may be required. Universal voltage driver permits operation at 1
20V AC.
Warning:
Check product label for correct input voltage!
Attach supply line wires to the appropriate light fixture wires as shown
in the diagram
Secure each pair of wires according to the diagram. Utilize a junction box or
similar device and take precautionary steps for weatherproofing all
connections if installed in a location where water may come in contact with the
unit. Ensure the unit is properly grounded and that wiring is done according to
all local and national electrical/building codes.
OPERATION
WARM UP
When the detector is initially powered up, a warm-up period of 1-2 seconds is allotted for
internal checks and communication. During this time, the LED is off and the current level is 3 rQA.
After the
checks are completed, normal operation will be
indicated by the LED flashing every four
seconds (current level is 4 mA).
If the detector is unable to reach the normal operating mode, the warm-up period may
extend
to five seconds, followed by a critical fault or an
advisory fault (see Table 1 for all
current levels).
If the problem persists, check for any loose wiring
connections, ensure that the
voltage supply is sufficient, and cycle power if necessary.
OUTPUTS
Relays
The
EXP-SD-SFC-120V-V1
detector is furnished with smoke alarm, fault, and auxiliary
relays. All three relays
are rated to 5 amperes at 30 Vdc.
7.55(19.18)
Dimensions in Inches (cm)
The smoke alarm relay has a single set of terminals and normally open /
normally closed contacts, and normally de-energized operation.
The fault relay has a single set of terminals and normally open contacts,
and normally energized operation.
The auxiliary relay has a single set of terminals and normally open / normally
closed contacts, and normally de-energized operation.
IMPORTANT
The auxiliary relay functions as pre-alarm.
O to 20 mA Output
This
EXP-SD-SFC-120V-V1
provides a Oto 20 mA de current for transmitting
detector status information to other devices. The circuit is wired in a non-
isolated
configuration and can drive a maximum loop
resistance of 300 ohms
from 12 to 17 .9 Vdc, 500 ohms from
.
1
8
to 19.9 Vdc, and 600 ohms from
20 to 30 Vdc. Table 1 defines the current levels
and corresponding detector
status. The output
is calibrated at the factory, with no need for field calibration.