__________________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e-2-s.com Fax: +44 (0)208 740 4200
Document No. IS 2451-P Issue E 19-02-10 Sheet 2 of 4 (2)
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
T115ºC Ta < +70ºC
Equipment Category:
2G/D
Ambient Temperature Range:
-50
°
C to +55
°
C
Gas Groups IIA, IIB and IIC
-50
°
C to +70
°
C Gas Group IIA and IIB
6)
Sounder Location and Mounting
The location of the sounders should be made with due regard
to the area over which the warning signal must be audible. The
sounders should only be fixed to services that can carry the
weight of the unit.
The sounder 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 angle can then be
adjusted in the direction that the sound is primarily required to
cover. This can be achieved by loosening the two large bracket
screws in the side of the unit, which allow adjustment 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.
7)
Access to the Flameproof Enclosure
In order to connect the electrical supply cables to the sounder
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 these
sounders.
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
sounders. The power supply selected must have the
necessary capacity to provide the input current to all of the
sounders connected to the system.
The following table shows the input current taken by the
various sounder units:-
Unit Type
Input
Input
Max.
Voltage
Current
I/P Volts
BExDS120D
24V DC
800mA
30V
BExDS120D
12V DC
850mA
15V
BExDS120D
48V DC
420mA
58V
BExDS120D
230V AC
90mA
264V
BExDS120D
110V AC
200mA
121V
BExDS120D
115V AC
180mA
126V
BExDS110D
24V DC
265mA
30V
BExDS110D
12V DC
195mA
15V
BExDS110D
48V DC
130mA
58V
BExDS110D
230V AC
56mA
264V
BExDS110D
110V AC
93mA
121V
BExDS110D
115V AC
110mA
126V
The input current will vary according to the voltage input level
and the frequency of the tone selected. The current levels
shown above are for the 440Hz Continuous tone @ nominal
input voltage. The 24V and 48V DC units and the 230V AC,
115V AC and 110V AC units have a switching voltage
regulator 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 12V units
do not have a voltage regulator and therefore their input
current will increase when the input voltage is increased.
Figure 1
Plastic Acoustic Horn
(Anti-static Plastic)
Flameproof
Chamber
Flameproof
Cover
S/S Mounting
Bracket
Figure 2
4 off M6 Cover Screws
External Earth
Terminal
