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Unpacking the Device — After unpacking the device,
examine it for damage and verify the parts. If a part is
missing or damaged, do not attempt to install the device.
Contact Federal Signal Customer Support.
EXPLOSION HAZARD: Damaged glass lenses can lead to
explosions which could result in serious injury or death.
FIRE/EXPLOSION HAZARD: To reduce the risk of fire
or explosion, do not install in a hazardous location
if the operating temperature exceeds the hazardous
atmosphere's ignition temperature. See Table 1.
Hazardous
Environment
Class I,
Division 2
Class II, Groups E, F, G
Class III
*Lens Color (C,A,B,G,R)
Clear
Amber
Blue
Green
Red
Electrical Connections
SHOCK/FIRE HAZARD: This is a four-wire device. When
installed, all four wires must be terminated. Failure to
terminate both red and both black wires will result in a
shock or fire hazard.
The 154XST is provided with four leads: two red and
two black. To achieve electrical supervision, connect
one red (+) lead to the positive side of the incoming
power source, and the other red (+) lead to the outgoing
power source. Likewise, connect one black (–) lead to
the negative side of the incoming power source, and the
other black (−) lead to the negative side of the outgoing
power source.
2
Table 1 Temperatures
Max. Temperature/T-
Code at 40°C Ambient
135°C/T4
100°C/T5
100°C/T5
Table 2 154XST-024*-CN Fire and Light Output Rating
Fire Rating
Public Mode
Private Mode
Private Mode
Private Mode
N/A
For marine applications, all wiring, including supply
wire, must be stranded wire and meet the USCG (CFR46)
Sections (110-113).
The Model 154XST has provisions for mounting to
3/4" pipe and may be mounted in any position. Before
mounting, ensure that mating threads are clean. To
prevent the ingress of water and dust, apply conductive
sealant to the conduit threads prior to mounting. If non-
conductive sealant is used, the enclosure must be earthed
via the provided internal grounding wire/grounding screw
to ensure proper grounding continuity. In high-humidity
environments when units are mounted dome down,
condensation may occur in the conduit system. Use
properly rated conduit seals/drains to prevent moisture
from entering the fixture. Thread the fixture onto the 3/4"
pipe and secure with the set screw.
Light Output
Electrical
Ratings
17 cd (with Guard) 24 Vdc
(regulated):
25 cd (without
16 Vdc to 33
Guard)
Vdc,
0.483 A to
0.226 A
Light Output with Guard
17 cd
6 cd
3 cd
5 cd
N/A
If required, the green screw in the housing is provided
for connection to an earth ground. See Figure 2. To gain
access to the screw, the power supply assembly can be
removed.
POLARITY SENSITIVITY: This unit is polarity sensitive
and may be damaged by incorrect electrical hookup.
Polarity must be observed for proper operation. Damage
will result if the voltage rating is exceeded.
Flash
Operating
Rate
Temperature
60 per
–67ºF to 104ºF
minute
(–55ºC to 40ºC)
Light Output without Guard
25 cd
12 cd
6 cd
12 cd
N/A
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