50067FA MOFLASH SIGNALLING, 50067FA Datasheet - Page 4

• Manufacturer Part Number: 50067FA
• Description: DOME, GREEN, FOR ALL SERIES
• Manufacturer: MOFLASH SIGNALLING

Specifications of 50067FA

• Svhc: No SVHC (18-Jun-2010)
• Body Colour: Green
• Body Material: Polycarbonate
• Colour: Green
• Enclosure Colour: Green
• Enclosure Material: Polycarbonate
• External Diameter: 125mm
• External Height: 156mm
• External Length / Height: 156mm

Selection & Application
Environmental Factors
Visual Warning Signals
Automotive
Industrial & Marine
Fire & Security
Explosion Proof
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The environment in which the beacon is to be installed
will determine the product type and light intensity that
is required for any application. Thus a beacon
designed for Industrial use incorporating a very high
light output would not be suitable for local signalling
at a control panel. Alternatively a low light output
beacon would be ineffective for large factory
environment.
Generally Moflash can supply beacons for all types of
applications. Listed below are some of the main
market areas.
Warning beacons for use on automobiles (commercial
& private) agricultural / off road vehicles and forklift
trucks etc.
For further information see our Automotive section.
Warning beacons for heavy duty, high light output
applications such as foundries, factory shopfloors,
large warehouses, docks, ports and general offshore
use etc.
For further information see our Industrial & Marine section.
Warning beacons for light duty, low to medium light
output to give local indication such as offices,
hospitals and schools.
For further information see our Fire & Security section.
Warning beacons for use in potentially explosive
environments such as oil rigs, refineries and mines
etc..
For further information see our Hazardous Areas section.
determining Selection
Safe atmosphere or potentially explosive atmosphere
The ambient level of existing light
The light output required from the beacon
The duration the beacon has to operate
The IP rating of the beacon
The electrical supply available
SELECTION & APPLICATION
Types of Visual Warning Beacons Available
Rotating Beacons – ‘R’
Flashing Filament Beacons – ‘FF’
Static Filament (Continuous) Beacons – ‘SF’
Xenon (Strobe) Beacons – ‘X’
Moflash manufactures five different types of Visual
Warning beacons.
A parabolic reflector, driven by an electric motor,
revolves around a continuously illuminated bulb on the
vertical axis of the beacon creating a powerful beam
of light travelling through 360 degrees. These units are
available with either a filament or a tungsten halogen
bulb. In general this type of beacon has a greater
degree of light output than other models but this is
reduced as the parabolic reflector only illuminates one
given point at a time.
For r information see pages 10, 11, 23 and 24.
Operating through an internal circuit, which simply
cycles the bulb On, and Off. These type of beacons
generally give a much lower light output as it takes
longer for the bulb to fully illuminate itself. These units
are available with either a filament or tungsten halogen
bulb. The light output can be improved by the use of a
Dioptric (Fresnal) lens which is placed over the bulb
capturing the light emitted, magnifying and directing it
to increase the brightness of the visual signal. In terms
of light coverage this type of beacon is more efficient
as it illuminates the whole surface of the beacon
constantly through 360 degrees.
For further information see pages 8, 9 and 23.
These units are identical to Flashing Filament beacons
with the exception that they do not operate through an
On, and Off cycle. When the unit is energised the light
source stays permanently ‘On’. The main advantage of
this type of beacon is that the light can be controlled
by a separate source i.e. a control panel, giving the
unit more flexibility. These units are available with
either a filament of tungsten halogen bulb.
For further information see pages 12, 13 and 20.
A discharge capacitor operating through a converter
circuit ignites xenon gas inside a tube creating a
brilliant flash of light. Xenon gas ignites virtually
instantaneously so maximum brightness is obtained
immediately. This signal can be improved further by
the use of a Dioptric (Fresnal) lens as described
earlier. In some Moflash models a ‘Double Flash’
option is also available which extends the signal
duration making it more noticeable to the human eye.
see X88, X201/200, X401/400 & 501/500.
Xenons have an added advantage of low current
consumption combined with long life. The tube life of
a xenon beacon is approximately 5 million flashes.
These units are the most efficient available
incorporating a 360-degree light output with the
brightest and most effective visual
information see pages 14 - 17, 20 - 21 and 25.
MOFLASH
signal.For further
LED Beacons - ‘LED’
Level of Brightness
Beacon Lens Colours
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A Light emitting diode (LED) is a semiconductor
device that emits visible light when an electric current
passes through it. The four major benefits of LED
technology incorporated into warning beacons are:
Low power requirement
High efficiency
Very long life
Multiple Colour Signal options in a single beacon
enclosure
Moflash offer a range of LED options, from beacons
containing 8 off LEDs up to 144 off LEDs in a single
enclosure. They can be set in various modes of
operation from Flashing, Static and Rotating. Some
beacons have a combined Audible & Visual option.
Ethernet compatible and PLC controllable beacons
also make up the range along with high ‘Ingress
Protection’ encolsures.
Brightness depends upon the type of beacon chosen
the rated power output of the unit i.e.: Watts and
Joules, the distance that the signal is observed from
and the dome colour of the beacon used. In general if
the viewing distance is doubled the light intensity
observed is reduced to a quarter and if the distance is
quadrupled the light intensity is reduced to a
sixteenth.
The intensity of the light can be greatly reduced as it
passes through the dome of the beacon. The extent
of this reduction is dependent upon:
The type of light source used i.e. conventional
filament (Incandescent) bulb, tungsten halogen bulb
or a xenon tube
The colour of the beacon lens that is used.
The table below gives an indication of the percentage
of light that will pass through the beacon dome for
different light sources and dome colours.
Different dome colours are used to convey different
messages to the observer.
RED
AMBER
GREEN
BLUE
Alternatively Green colour beacons are used by
Doctors and Veteriniarns and Blue beacons for the
Police and Fire departments.
COLOUR
Amber
Clear
Green
Blue
Red
= Serious danger act now!
= specific process notice/warning
= ok proceed as normal
= warning proceed with care
FILAMENT
100%
70%
30%
12%
8%
HALOGEN
100%
70%
27%
15%
10%
XENON
100%
70%
23%
25%
13%
SELECTION & APPLICATION
Audibility
Installation and Maintenance of
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Simply producing an audible sound when the beacon
is illuminated. This is of particular use in low level
noisy environments if the warning light is obscured
from direct viewing or as a back-up warning should
the bulb fail.
When installing a Hazard Warning Beacon care
should be taken to position it in the most effective
location to allow for all round light visibility and to
maintain the IP (Ingress Protection) rating of the
beacon. Therefore the following parameters should be
noted:
To maintain the IP rating, the beacon should be
mounted with the dome above the black moulded
base. Never mount the unit with the dome horizontal
or below base position.
Always fit mounting gasket provided (200/1 400/1 &
500/1 series models only) and ensure the ‘O’ ring is in
place between the dome and base.
Fit a suitably IP rated cable gland (not supplied)
where appropriate.
Regularly clean the beacon dome, as this will improve
light output and help dissipate heat build up in the
beacon. Do not clean dome with petroleum based
cleaners.
Areas of vibration should be avoided. If this is not
possible, then out Anti-Vibration mount must be used.
Reference 50080 (available for 88/125 & 200/1 series
models only).
Avoid situation Xenon beacons in close proximity to
communication aerials or equipment and power lines
that may be subject to high voltage transients.
DC voltage Xenon beacons should only be run on a
smoothed rectified supply.
Unlike Incandescent lamps which fail instantly, Xenon
tubes deteriorate very slowly. The impending failure of
the tube will be indicated by erratic flashing. Once
this is recognised the tubes should be replaced
immediately. Failure to do so may result in damage to
the electrical circuit.
Always disconnect the beacon from the supply before
attempting maintenance. In addition, allow Xenon
beacons at least 15 minutes to self-discharge before
removing the dome as high voltages will remain on
the pcb for this period of time.
Visual Warning Beacons
MOFLASH