The Dialight Flashing Red Beacon is designed for the lighting of radio towers,
wind generators and other obstructions to aerial navigation, as specified by the
FAA, FCC, ICAO and Transport Canada.
The L-864 Series D464 Infrared (IR) obstruction light incorporates both Red and
IR LEDs in a single unit to ensure visibility around military bases, airfield
perimeters, buildings, towers and other obstructions for aircraft pilots, both during
normal flight or when aided by night vision systems. Night Vision Goggles
(NVGs) and Aviator’s Night Vision Imaging System (ANVIS) often employ Class
A, B, and C filters. These filters can reduce LED sources that emit light in the
visible spectrum. The Vigilant L-864 D464 Series overcomes this obstacle by
combining visible red LEDs and IR LEDs in a single unit.
The L-864 Flashing Red Beacon as shown in Figure 1, (hereafter referred to as
the Beacon) operates from 120 / 240VAC 50/60 Hz. The beacon consists of
visible-light and Infrared-light,high Performance LED’s that provide the light
output equivalent to an incandescent fixture while consuming a fraction of the
electrical power. This manual provides guidance and recommendations for the
installation and testing of the beacon assembly. Please read this document in its
entirety before installing the Beacon.
Remove power from all wiring and circuitry before installing or working on the
Beacon.
Wiring the Beacon
The Beacon only requires a connection to 120 / 240 VAC, 50/60 Hz power. The
ground wire must be connected for proper operation and protection of the
Beacon.
Mounting the Beacon
Dialight recommends the installation of one or more lightning rods near the
installed Beacon. The lightning rods should extend a minimum of three feet
above the height of the Beacon.
The Beacon is mounted to the tower pedestal utilizing customer supplied ½”
hardware. Six mounting holes are provided on the Beacon base (Figure 2).
These mounting holes will align with most tower pedestals. The Beacon must be
installed level according to the bulls-eye level inside the light engine to maintain
light output in accordance with FAA requirements.
Prior to installation, it is recommended that the unit be tested to ensure no
damage was incurred during shipping. This is accomplished by applying power to
the beacon. Visual verification of the functioning of the Beacon will indicate
proper performance.
Upon completion of this test, the installation may proceed.
Section 4: Beacon Theory of Operation
4.0 System Overview
The block diagram in Figure 4 shows the major components of a typical Beacon
installation. The parts of the system are the LED Beacon and Controller. The
LED Beacon is made up of one LED module, which lights when current passes
through it. The LED Beacon contains its own internal power supply. The Beacon
is designed for use with an external controller. This external controller provides
the properly timed flashing signal, fault monitoring and alarm interfaces.
The Beacon incorporates protection against voltage surges (as induced by
nearby lightning strikes for example) by means of a Metal Oxide Varistor (MOV)
and Gas Discharge Tube (GDT) arrangement.
Section 5: Maintenance and Troubleshooting
No regularly scheduled maintenance is required for the Beacon.
General cleaning of the Dome Assembly should be done using soapy water. No
other cleaning solutions are recommended. Abrasive compounds will scratch the
Dome Assembly.
Table 1 Lists possible faults and repair procedures for the L-864 Red Beacon
Table 1 Troubleshooting
Symptom Possible Cause Corrective Action
Beacon does not light No AC power
LED Failure
Power supply Failure
Verify proper AC levels from
power source thru supply
lines.
The only parts that are serviceable on the Beacon are the Light Engine and
Power Supply.
Replacement procedure for the Light Engine
Step 1 WARNING: Power to the Beacon must be removed prior to servicing.
Step 2 Unclamp the two latches holding the light engine down.
Step 3Rotate the light engine back to its open position.
Step 4Carefully pull the inline connector between the LED module and power
supply apart, and than unscrew the grounding strap from the light engine
to separate the two assemblies. Be careful not to lose the screw for the
ground strap.
Step 5Rotate the light engine downwards to approximately 10 degrees from the
closed position. The key should line up with the keyway on the hinge and
allow for the light engine to be pulled off of its pins.
Figure 6 – Light Engine Install/Removal (Dome and cantilever not
shown for clarity)
Step 6 Slide the new light engine onto the pins to line it up. Rotate it to
approximately 10 degrees from closed to again line up the keyway. Push
the light engine past the key until it clears and than rotate it back to the
open position.
Step 7Reconnect the inline connector between the light engine and power
supply, followed by the grounding strap.
Step 8 Rotate the light engine down to the closed position and secure the two
latches to complete installation. Apply power to ensure the beacon lights
up correctly.