Highway Crossing
Equipment
Ansaldo STS USA
(Formerly known as Union Switch & Signal)
RSE-5B1
Rev. 4-07
HC-120B Flashing Light Units and Assemblies
ASTS USA’s HC-120B Flashing Lights meet or exceed
industry standards for motorist visibility at highway
crossings in all types of environments and installations,
and are designed for maximum ease of maintenance. At
the heart of the HC-120B assembly is an LED-based
light unit that is simpler in design, longer lasting and
consumes much less power than comparable
incandescent lamp units. The HC-120B is available in a
variety of multi-light assembly configurations, as well
as individual light unit designs. Included is a retrofit
version that allows replacement of existing
incandescent light units with the new LED technology.
General Description
Flashing Light Assemblies
HC-120B Flashing Light assemblies utilize all-aluminum
brackets and junction box crossarms, and are provided with
two light units for 1-way configurations, or four light units for
2-way configurations. Selected models of the 2-way version
are available with extension arms for additional clearance on
the highway crossing mast. Clear access for wiring is
provided through a threaded crossarm mounting fitting.
Threaded elbows permit independent horizontal (azimuth)
and vertical (range) adjustment of each signal. Standard
AREMA terminals serve as quick connect/disconnect points.
Light unit options include the new LED or traditional
incandescent models; these can be outfitted with a variety of
hoods and backgrounds made of high durability plastic or
aluminum. HC-120B assemblies can be mounted on 4” or
5” (10.2 cm or 12.7 cm) masts, and selected models are
designed for use with ASTS USA’s Model 95 Gate Crossing
Mechanism.
Flashing Light Units
HC-120B Flashing Light units combine the best features of
existing housing design with LED light source technology,
and are compliant with both AREMA and AASHO standards.
The external cast-aluminum shell is fully sealed against
water and dust, and incorporates a sighting device that
permits field alignment on the arm assembly by just one
person. The rear of the unit is equipped internally with an
AREMA-approved terminal strip that allows quick connect
and disconnect of light module and external wiring. Hood
and background options include 20” or 24” (50.8 cm or 60.9
cm) diameter and high impact plastic or aluminum
construction.
The LED-based HC-120B light module generates light via a
matrix of 360 or 141 high-efficiency LEDs that form a
coherent beam when viewed externally. The combined
LEDs are brighter than similar incandescent units and
consume 40% less power than a comparable incandescent
lamp with the same brilliance. As a result, the HC-120 light
module helps extend the life of back-up batteries at the
To order, call 1-800-652-7276
e-mail: orders@ansaldo-sts.us
crossing location when these batteries are needed. The
LED matrix has an estimated operating life of 100,000
hours; in the event a single LED fails, overall beam intensity
is reduced by less than 2 percent. Optically, this unit
replaces earlier lights with 30o/15o, 20o/32o, 70o/0o spread
and deflection patterns.
The HC-120B LED light module incorporates a 12” (30.5 cm)
hard-coated polycarbonate red lens that is both vandal and
water-resistant, and red-tinted to optimize the LED light
wavelength. Bright LED side lights (white) are included to
enable the locomotive engineer to confirm the flashing light
is operational. The module housing is also equipped with air
vents and a perimeter rubber gasket for water and dust
protection. Selected light modules also incorporate a built-in
voltage regulator to ensure against overvoltage damage
from the external power supply. Lightning and surge
protection circuitry is also provided. The complete light
module is mounted in the external housing with four
mounting clips, and is connected to the housing terminal
strip with two #18 AWG wires.
As shown in the ordering tabulation, a retrofit kit version of
the HC-120B LED light module is available for direct
replacement of 12” (30.5 cm) incandescent lamp units. No
special modifications are required on the flashing light
assembly or housing when upgrading to the LED lamp.
Advantages
•
•
•
•
•
•
1 or 2-way mast-mounted arm assemblies available
AREMA and AASHO-compliant design
LED module brighter than incandescent lamps
LED module uses high efficiency red LEDs
Consumes 30% less power than incandescent lamps
Increased available battery back-up time for highway
crossing warning systems
www.ansaldo-sts.com
RSE-5B1, p. 1
Ansaldo STS USA
HC-120B Flashing Light Units
and Assemblies
(Formerly known as Union Switch & Signal)
RSE-5B1
Rev. 4-07
Specifications (LED Light Module)
LED Light Unit
Advantages (Cont’d)
•
•
•
•
Sufficient light output is maintained if discrete LED failure
should occur
LED Types:
Red and white, non-regulated.
LED Loss:
<2% of total output with loss of 1
LED
LED Life:
100,000 hours @ 10 volts
Total Luminosity:
705 Candelas (calculated)
Light Source Matrix
14 parallel strings of 10 LEDs in
series
Light Wavelength:
630 nm (dominant)
Viewing Angle:
30 degrees
Overall Dimensions:
12” (30.5 cm) diameter, 5” (12.7
cm) depth (approx.)
Side Lights:
6-LED light units (white), 180 deg.
spacing, 34.8 Candelas per side
Current Draw:
10 volts = 1 Amp
Operating Power:
10 Vac or 10 Vdc (nom.), +1.5V
Regulated Range:
6 to 18 Vdc, 5 to 13 Vac
Power Consumption:
10W @10 Vdc
LED Current Limit:
10 volts (max.)
VA Limit:
12 VA @10 volts
Wiring:
Cast aluminum water-tight housing with side-view lights
(white)
Two #18 AWG wires with crimped
1/4” RWG terminals
Wire Run Length:
Polycarbonate lens (0.125” (0.3175 cm) thick) tinted to
match LED wavelength
When exceeding 250 ft: Use #10
AWG
Operating Temp.:
-30oC to +85oC (-22oF to +185oF)
Replaces lights with 30o/15o, 20o/32o, and 70o/0o spread
and deflection patterns
Flashing Light Assemblies with Junction Box Cross Arms
Figure “A”. 2-Way Back-to-Back
Flashing Light Assembly
(For use without gate mechanisms)
RSE-5B1, p. 2
Figure “B”. 1-Way Flashing
Light Assembly
Figure “C”. 2-Way Flashing
Light Assembly for use with
Gate Arm assemblies
HC-120B Flashing Light Units
and Assemblies
Ansaldo STS USA
(Formerly known as Union Switch & Signal)
RSE-5B1
Rev. 4-07
Ordering Information
•
•
•
Refer to ordering tabulations below for HC-120B
assemblies, flashing light units and associated
replacement/retrofit components.
Contact your ASTS USA Account Executive for HC-120B
configurations not shown in ordering tabulation, and for
replacement parts.
Refer to figures on page 2 and 4 for various assembly
configurations.
Order No.
N46711301
N46711306
X451506-0103
X451506-0104
X451506-0303
X451506-0306
X451506-0308
X451506-0312
Order No.
X46709307
X46709314
N46712501
N46712502
Order No.
N46711101
N46711102
N46711103
N46711104
N46100604
N451497-0602
J705191-6181
HC-120B Flashing Light Unit Assemblies
Light Unit Type
Side
(No. of LEDs)
Light
Mast
Config.
Spread
LED
X
5"
1-way
30º-70º
LED
X
5"
2-way
30º-70º
Incandescent
-4"
1-way
30º-15º
Incandescent
-4"
2-way
30º-15º
Incandescent
-5"
1-way
30º-15º
Incandescent
-5"
2-way
30º-15º
Incandescent
-5"
2-way
30º-15º, 30º-15º
Incandescent
-5"
2-way
30º-15º, 70º-0º
Note (1): Used with Model 95 Gate Mechanism (see RSE-5A1);
hoods and 20" backgrounds included.
XA-120 Junction Box Crossarms
One
Two
For Use with
Way
Way
Gate Mechs.
X
---X
X
X
X
---X
General note: All above 5" mast.
Extens.
Arms
-X
----X
X
Ref.
Fig.
"B"
"C"
"B"
"A"
"B"
"A"
"C"
"C"
Notes
(1)
(1)
----(1)
(1)
HC-120B Hoods & Backgrounds
Ref.
Fig.
"D"
"E"
"F"
"G"
Order No.
M451498-2501
M46100701
M46100802
M46100801
M451498-3701
M451498-3702
Hood, Metal (Aluminum)
Hood, Plastic
Background, 20" Plastic
Background, 24" Plastic
Background, 20" Metal (Aluminum)
Background, 24" Metal (Aluminum)
HC-120B Light Units
Light Unit
Type
Spread
Sidelights
Regulator
LED
30º-70º
X
X
LED
30º-70º
X
X
LED
30º-70º
X
X
LED
30º-70º
X
X
LED
30º-70º
X
X
Incandescent
30º-15º
--Basic LED light unit incorporated in above LED style assemblies
(includes white side lights, voltage regulator)
Note (1): With 24" hoods and backgrounds
Note (2): With 20" aluminum hoods and backgrounds
Note (3): With 24" plastic hoods and backgrounds
Note (4): Kit for replacement of HC-120B incandescent light unit.
Notes
-(1)
(2)
(3)
(4)
--
RSE-5B1, p. 3
Ansaldo STS USA
HC-120B Flashing Light Units
and Assemblies
(Formerly known as Union Switch & Signal)
RSE-5B1
Rev. 4-07
Figure “D”. XA-120 Junction Box Cross Arm
Order No. X46709307
(for 1-Way Flashing Light Assemblies)
Figure “E”. XA-120 Junction Box Cross Arm
Order No. X46709314
(for 2-Way Flashing Light Assemblies)
1
1
4
6
18”
8”
2
7
30”
6
8”
7
2
15”
30”
Figure “F”. XA-120 Junction Box Cross Arm
Order No. N46712501
(for 1-Way Flashing Light Assemblies)
Figure “G”. XA-120 Junction Box Cross Arm
Order No. N46712502
(for 2-Way Flashing Light Assemblies)
1
3
7
13-3/8”
3
5
6
1
6
5
13-3/8"
7
13-3/8”
15"
15"
15”
Order No.
M397808
J026105-2001
M46713301
M026105-2005
RSE-5B1, p. 4
Junction Box Cross Arm Major Parts
Item No.
Description
Order No.
1
"U"-Bolt
M46713401
2
Short Bracket
J026105-2101
3
Short Bracket
M451416-0301
4
Long Bracket
15”
Item No.
5
6
7
Description
Long Bracket
Elbow
Junction Box