Federal Signal Corporation 151XST Series Manual

256822J
REV. J 613
Printed in U.S.A.
Model 151XST Series Strobe Light
for Use in Hazardous Conditions
Installation and
Maintenance Manual
français...............page 21
español...............página 43

Warranty – Seller warrants all goods for ve years on parts and 2-1/2 years on labor,
under the following conditions and exceptions: Seller warrants that all goods of
Seller's manufacture will conform to any descriptions thereof for specications which
are expressly made a part of this sales contract and at the time of sale by Seller such
goods shall be commercially free from defects in material or workmanship. Seller
reserves the right at the Seller’s discretion to “Repair and Return” or “Replace” any
item deemed defective during the warranty period. This warranty does not cover
travel expenses, the cost of specialized equipment for gaining access to the product,
or labor charges for removal and reinstallation of the product. This warranty shall be
ineffective and shall not apply to goods that have been subjected to misuse, neglect,
accident, damage, improper maintenance, or to goods altered or repaired by anyone
other than Seller or its authorized representative, or if ve years have elapsed from
the date of shipment of the goods by Seller with the following exceptions: lamps
and strobe tubes are not covered under this warranty. Outdoor warning sirens and
controllers manufactured by Federal Warning Systems are warranteed for two years
on parts and one year on labor. No agent, employee, representative or distributor
of Seller has any authority to bind the Seller to any representation, afrmation, or
warranty concerning the goods and any such representation, afrmation or warranty
shall not be deemed to have become a part of the basics of the sales contract and shall
be unenforceable. THE FOREGOING WARRANTIES ARE EXCLUSIVE AND IN
LIEU OF ALL OTHER WARRANTIES OR MERCHANTABILITY, FITNESS FOR
PURPOSE AND OF ANY OTHER TYPE, WHETHER EXPRESS OR IMPLIED.
These warranties shall not apply unless Seller shall be given reasonable opportunity
to investigate all claims for allegedly defective goods. Upon Seller's instruction a
sample only of allegedly defective goods shall be returned to Seller for its inspection
and approval. The basis of all claims for alleged defects in the goods not discoverable
upon reasonable inspection thereof pursuant to paragraph 8 hereof must be fully
explained in writing and received by Seller within thirty days after Buyer learns of
the defect or such claim shall be deemed waived.
Industrial Systems
2645 Federal Signal Drive • University Park, IL 60484-3167
Tel: [phone] • Fax: [phone]
Email: [email protected] • www.federalsignal-indust.com
© 2013 Federal Signal Corporation. All rights reserved.

Models 151XST and 151XST-S
3
Contents
Safety Messages to Installers ..........................................................5
An Overview of the 151XST Series ..................................................6
Unpacking the Light..........................................................................7
Pipe-Mounting the Beacon (151XST)...............................................9
Surface-Mounting the Beacon (151XST-S)....................................10
Wiring the Beacon........................................................................... 11
Wiring the AC Models............................................................ 12
Wiring the DC Models ........................................................... 14
Safety Message to Maintenance Personnel..................................14
Replacing the Flash Tube ....................................................... 16
Replacing the Printed Circuit Board (PCB) ........................... 17
Cleaning the Fixture ............................................................... 18
Lubricating the Threaded Joint ............................................... 18
Getting Repair Service or Technical Assistance .........................19
Ordering Accessories and Replacement Parts ............................19
Returning the Product for Credit ...................................................20
Tables
Table 1 Specications ........................................................................7
Table 2 Voltage and operating current ...............................................7
Table 3 Flash rate and candelas ........................................................8
Table 4 Hazardous Location Rating ...................................................8
Table 5 Replacement parts ..............................................................19
Table 6 Accessory ............................................................................20

4
Models 151XST and 151XST-S
Contents
Figures
Figure 1 Pipe-mounted beacon .......................................................10
Figure 2 Surface-mounted beacon .................................................. 11
Figure 3 Cross section of beacons ..................................................13
Figure 4 Normal (A) and darkened (B) ash tube ............................17

5
Installation and Maintenance Instructions
Models 151XST and 151XST-S
Safety Messages to Installers
It is important to follow all instructions shipped with this product.
This device is to be installed by a trained electrician who is
thoroughly familiar with the National Electrical Code and/or
Canadian Electrical Code and will follow the NEC and/or CEC
Guidelines as well as all local codes. This beacon should be
considered a part of the warning system and not the entire warning
system.
The selection of the mounting location for the beacon, its controls
and the routing of the wiring are to be accomplished under the
direction of the facilities engineer and the safety engineer. In
addition, listed below are some other important safety instructions
and precautions you should follow:
• Read and understand all instructions before installing or
operating this beacon.
• Never alter the beacon in any manner. Safety in hazardous
locations may be endangered if additional openings or other
alterations are made to units specically designed for use in
these locations.
• Do not connect this beacon to the system when power is on.
• After installation, ensure that the set screw is properly
tightened and that threaded joints are fully engaged.
• After installation, test the beacon to ensure that it is operating
properly.
• After testing is complete, provide a copy of this instruction
booklet to all operating personnel.
• Establish a procedure to routinely check the light installation
for integrity and proper operation.

6
Installation and Maintenance Instructions
Models 151XST and 151XST-S
Failure to follow all safety precautions and instructions may result
in property damage, serious injury, or death.
An Overview of the 151XST Series
Federal Signal’s Model 151XST hazardous location strobe light
provides 80 high-intensity ashes per minute. This warning light is
available in 12-24 Vdc, 120 Vac and 240 Vac, 50/60 Hz.
The Model 151XST strobe light is UL Listed and CSA Certied
for Class I, Division 2, Groups A, B, C and D; Class II, Division 1,
Groups E, F and G; and Class III.
The 151XST meets Type 4X water-tight, dust-tight, and corrosion-
resistant requirements; constructed to IP66. This hazardous
location warning light has an aluminum base, coated for corrosion
resistance that is ready for mounting on a 3/4-inch NPT pipe.
The included dome guard ts over the glass dome to protect it
against accidental collision with moving equipment, such as
forklifts. An optional wall bracket is also available.
The 151XST has an effective candela (ECP) of 165 and a 520,000
peak candela. It is available in six dome colors, including amber,
blue, clear, green and red (magenta upon request).
Federal Signal’s rugged 151XST strobe warning light is
specically designed for hazardous locations or corrosive
environments where a very bright visual signal is required.
This warning light can be used for plant evacuation or other
communication needs.
Models are available for pipe mounting (151XST) or surface
mounting (151XST-S).
NOTE: The Model 151XST can be mounted to a Federal
Signal Model LHWB bracket. If installed in this way, the entire
assembled device is suitable only for Class I, Div. 2, Groups A, B,
C, and D; Class II, Div. 2, Groups F and G; Class III locations.

7
Installation and Maintenance Instructions
Models 151XST and 151XST-S
Unpacking the Light
EXPLOSION HAZARD—Damaged domes can lead to
explosions that could result in serious injury or death.
After unpacking the beacon, examine it for damage that may
have occurred in transit. If the beacon has been damaged, do not
attempt to install or operate it. File a claim immediately with
the carrier, stating the extent of the damage. Carefully check all
envelopes, shipping labels, and tags before removing or discarding
them. Disposal of all shipping materials must be carried out in
accordance with national and local codes and standards. If any
parts are missing, please call Federal Signal Customer Support at
708-534-4756 or 877-289-3246.
Table 1 Specications
Lamp Life: 10,000 hours
Light Source: Strobe tube
Operating
Temperature:
-67 °F to 150 °F
(-55 °C to 65.6 °C)
Net Weight: 3.8 lb (1.7 kg)
Shipping Weight: 4.5 lb (2.0 kg)
Height: 9.25 in (234.95 mm)
Diameter: 5.5 in (139.7 mm)
Table 2 Voltage and operating current
Model Voltage Operating
Current
151XST(-S) 012-024__ 12-24 Vdc 1.3 A to 0.60 A
151XST(-S)-120__ 120 Vac, 50/60 Hz 0.35 A
151XST(-S)-240__ 240 Vac, 50/60 Hz 0.16 A
__ Indicates color: (A) amber, (B) blue, (C) clear, (G) green, (M) magenta
or (R) red.

8
Installation and Maintenance Instructions
Models 151XST and 151XST-S
Table 3 Flash rate and candelas
Model Flash Rate
per Minute
Candela
Peak1ECP2
151XST(-S) 012-024__ 80 520,000 165
151XST(-S)-120__ 80 520,000 165
151XST(-S)-240__ 80 520,000 165
__ Indicates color: (A) amber, (B) blue, (C) clear, (G) green,
(M) magenta or (R) red.
1Peak candela is the maximum light intensity generated
by a ashing light during its light phase.
2ECP (Effective Candela) is the intensity that would appear
to an observer if the light were burning steadily.
Table 4 Hazardous Location Rating
Temperature Code at Maximum Temperature, °C
Hazardous Location 66 ºC
Class I, Div 2, Groups A, B, C & D T1/301º
Class II, Div 1, Groups E, F & G T5/100º
Class III T5/100º
To reduce the risk of re or explosion, do not install the beacon
in a hazardous location if the operating temperature exceeds the
ignition temperature of hazardous atmosphere.
Before proceeding, use Table 4 above as a guide and determine
that the unit’s operating temperature DOES NOT exceed the
hazardous atmosphere’s ignition temperature.
For marine applications, all wiring including supply wire must be
stranded wire and meet the USCG (CFR46) Sections (110-113).
NOTE: 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 xture.

9
Installation and Maintenance Instructions
Models 151XST and 151XST-S
Pipe-Mounting the Beacon (151XST)
EXPLOSION HAZARD—To reduce the risk of re or explosion,
do not install the beacon in a hazardous location if the
operating temperature exceeds the hazardous atmosphere’s
ignition temperature. Before proceeding, consult the product
nameplate and determine the operating temperature of the
beacon.
NOTE: To comply with NEC Section 300-14, which requires a
minimum of 6 inches (15.25 cm) of free conductor at a junction,
when mounting the Model 151XST, the mounting pipe used to join
the unit to a splice box should be no longer than 10 in (25.4 cm).
The Model 151XST has provisions for mounting a 3/4" pipe and
can be mounted in any position.
1. Before mounting the beacon, ensure that the mating threads
are clean.
2. 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 (Figure 3 on page 13).
3. See Figure 1 on page 10. Thread the xture onto the 3/4-inch
pipe and secure it with the set screw.

10
Installation and Maintenance Instructions
Models 151XST and 151XST-S
Figure 1 Pipe-mounted beacon
151XST LIGHT
ASSEMBLY
SET SCREW
3/4" NPT PIPE
290A6904
Surface-Mounting the Beacon (151XST-S)
To surface mount the beacon:
1. See Figure 2. Use the mounting base as a template to mark the
location of the two mounting holes.
2. Drill a 9/32-inch (7.143 mm) hole at each mark.
3. Secure the beacon to the mounting surface with installer
supplied hardware.