Area Classification Dust:
Zone 21
Explosive dust air mixture likely to occur in
normal operation.
Zone 22
Explosive dust air mixture not likely to occur, and
if it does, it will only exist for a short time.
IP Rating:
IP67
T100ºC Ta < +55ºC
T85ºC Ta < +40ºC
Equipment Category:
2G/D
Ambient Temperature Range:
-50
°
C to +55
°
C
(T6 = +40ºC)
6)
Beacon Location and Mounting
The location of the beacons should be made with due regard
to the area over which the warning signal must be visible.
They should only be fixed to services that can carry the
weight of the unit.
The beacons should be securely bolted to a suitable surface
using the 7mm diameter boltholes in the stainless steel U
shaped mounting bracket (see figure 1). The required angle
can be achieved by loosening the two large bracket screws in
the side of the unit, which allow adjustment of the beacon in
steps of 18
°
. On completion of the installation the two large
bracket adjustment screws on the side of the unit must be
fully tightened to ensure that the unit cannot move in service.
SAFETY WARNING:
The flashdome guard must not be removed from the unit
at any time.
7)
Access to the Flameproof Enclosure
In order to connect the electrical supply cables to the beacon
it is necessary to remove the flameproof cover to gain access
to the flameproof chamber. To achieve this remove the four
M6 hexagon socket head screws (see figure 2) and withdraw
the flameproof cover taking extreme care not to damage the
flameproof joints in the process.
Note the four
M6 screws are Class A4-80 stainless steel
and only screws of this category can be used on the
beacons.
It is therefore important that these screws and their
spring washers are kept in a safe place during installation.
On completion of the cable wiring installation the flameproof
joints should be inspected to ensure that they are clean and
that they have not been damaged during installation. Also
check that the earth bonding wire between the two casting
sections is secure and the ‘O’ ring seal is in place. When
replacing the flameproof cover casting ensure that it is square
with the flameproof
chamber casting before inserting.
Carefully push the cover in place allowing time for the air to
be expelled. Only after the cover is fully in place should the
four M6 Stainless Steel A4-80 cover bolts and their spring
washer be inserted and tightened down. If the cover jams
while it is being inserted, carefully remove it and try again.
Never use the cover bolts to force the cover into position.
8)
Power Supply Selection
It is important that a suitable power supply is used to run the
beacons. The power supply selected must have the
necessary capacity to provide the input current to all of the
beacons
The following table shows the input current taken by the
various beacons:-
Unit Type
Nominal I/P
Input
Max.
Voltage
Current
I/P
Volts
BExBG05D
12V DC
750mA
15V
BExBG05D
24V DC
300mA
30V
BExBG05D
48V DC
180mA
58V
BExBG05D
230V AC
55mA
253V
BExBG05D
115V AC
140mA
126V
The input current will vary according to the voltage input
level. The current levels shown above are for nominal input
voltage. The 12V, 24V and 48V DC units have a converter
circuit and therefore the input current level will decrease
slightly as the input voltage in increased and will increase
slightly as the input voltage is reduced.
The above table also shows the maximum voltages at which
the beacons can be operated.
Flashdome
Guard
Flameproof
Chamber
Flameproof
Cover
S/S Bracket
Figure 1
4 off M6 Cover Screws
External Earth
Terminal
Figure 2
