Document UT-MT-0778_EN
Page 10 of 39
Edition 11/03/2014
Supersedes edition 02/03/2014
LED INSET THRESHOLD/END LIGHT L
THE04
INSTRUCTION MANUAL FOR USE, INSTALLATION AND MAINTENANCE
2.1.3
Power Supply/Control Board
The power supply/control board is encapsulated into waterproof and heat
conductive silicon resin.
The PCB powers and controls the LEDs so that the light output provided at every
current step from 2.8 A to 6.6 A is comparable to a traditional halogen lamp,
according to the requirements of FAA “Engineering Brief N°67” document.
2.1.4
Lower Cover
The
lower cover
consists of a treated aluminium casting; it is fastened to the dome
by means of six screws HSFH M5x10. Two O-Ring are provided between dome and
lower cover. The dome is equipped with a reference pin for its proper positioning.
The cover is provided with one or two threaded holes for cable entry and external
grounding screw with yellow-green cable lead, size 2.5 mm
2
, 0.460 m long, with male
faston terminal. A suitable valve is outside mounted for the leakage test.
Watertightness between fixture and shallow base is ensured by means of an O-Ring
(separately supplied) to be placed on the relevant shallow base groove.
The fixture is supplied with one or two
cable lead with L-823 plug
; they consist of
two single-pole teflon leads, size 2.1 mm
2
(#14 AWG), 0.700 m long. The plug is in
compliance with FAA AC 150/5345-26 for very quick coupling with the receptacle
mounted on the shallow base.
If the light unit is equipped with one cable lead with plug, both the power
supply/control board sections will work simultaneously; if it is necessary to operate
independently the two power supply/control board sections, then two cable leads
with plug are necessary.
The fixture is 304 mm in diameter and 107 mm (+ 18.5 mm for plugs) high; the
protrusion above the ground is less than 6.35 mm.
An identification data label is externally applied over the lower cover (Figure 2 – n°2).
Moreover, to identify quickly the beam colour, the letters “A” and “B” of the dome in
front of the windows are painted in the same colour of the light beam.
