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Table 1 Specifications
Operating Voltage 12-24 Vdc
Current
Inrush Current
Audibility
Figure 1 Dispersion characteristics
AUDIBLE SIGNAL DEVICE
3 m
85 dB
-6 dB
–3 dB
Wiring the Horn
SHOCK HAZARD: To avoid electrical shock hazards, do
not connect wires when power is applied. Failure to heed
this warning may cause serious injury or death.
WIRING PRECAUTION: National Electrical Codes as well
as local codes must be adhered to in the installation
of the Model 450EWBX-024 horn. All electrical wiring
must be routed through approved conduit and fittings
as specified. Failure to heed this warning may cause an
electrical shock or render the horn inoperable, causing
serious injury or death.
WIRING PRECAUTION: Refer to NFPA 70 (NEC) and CSA
C22.1 Canadian Electrical Code, Part 1, Safety Standard
for Electrical Installation, Section 32. Failure to heed this
warning may cause an electrical shock or render the horn
inoperable, causing serious injury or death.
For power connections, use only wire sized 12 AWG
to 18 AWG (2.5 mm to 1.0 mm). Strip no more than
0.25" (6 mm) of insulation from the ends of the power
wires. Torque the terminal screws to 4.5 in-lb (0.51 Nm)
maximum.
NOTE: This device is polarized by a diode for use in
supervised systems.
2
0.12 A to 0.25 A
764 mA RMS over a 16.7 ms time
window
For dispersion characteristics, see
Figure 1.
14º
27º
–3 dB
99 dB
To wire the horn:
1.
Connect the positive (+) lead from the power source
to one of the positive terminals of the connector
plug.
2.
Connect the negative (-) lead from the power source
to one of the negative terminals of the connector
plug.
3.
Connect the remaining positive (+) and negative (-)
terminals on the connector plug to the next horn or
3 m
an end-of-line device. See Figure 2.
85 dB
12-24 Vdc POWER
-6 dB
Mounting the Horn
SHOCK HAZARD: To avoid electrical shock hazards
and equipment failure, refer to the warning messages
to installers and the installation instructions before
installing the horn. Failure to heed this warning may
cause serious injury or death.
The Model 450EWBX-024 has three 1/2" NPT tapped
openings to accommodate 1/2" NPT conduit. See
Figure 3.
There is no specific mounting orientation required for the
horn. After wiring the horn, mount it on the backbox with
the provided #8 x 1-5/8" self-tapping screws. Torque the
mounting screws 12 in-lb to 16 in-lb (1.4 Nm to 1.8 Nm).
The backbox is fitted with factory-molded knockout seals.
EXPLOSION HAZARD: Open holes in the backbox must be
sealed. If sealing an unused hole, use listed liquid-tight
plugs to maintain the hazardous location protection,
Type 4X, and IP66 enclosure ratings. Failure to heed
this warning may result in an explosion, causing serious
injury or death.
Figure 2 Wiring connections
+
NEXT HORN OR
-
END-OF-LINE DEVICE
+
-
Federal Signal signaling.fedsig.com
+
-
290A7591
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