Power Supply Selection - E2S BExCS110-L2 Instruction Manual

8) Power Supply Selection

It is important that a suitable power supply is used to run the
equipment. The power supply selected must have the
necessary capacity to provide the input current to all of the
units.
The following table shows the input current taken by the
various combined sounder beacons and shows the maximum
voltage at which the combined sounder beacons can be
operated:
Nominal
Model No.
I/P Voltage
BExCS110-L2D
24Vdc
DC024
BExCS110-L2D
48Vdc
DC048
BExCS110-L2D
115Vac
AC115
BExCS110-L2D
230Vac
AC230
Sounder Section
The input current to the sounder section 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.
Beacon Section
The input current to the beacon section will vary according to
the voltage input level. The current levels shown above are
for nominal input voltage.
9) Selection of Cable. Cable Glands, Blanking
Elements & Adapters
When selecting the cable size, consideration must be given
to the input current that each unit draws (see table above),
the number of combined sounder beacons on the line and the
length of the cable runs. The cable size selected must have
the necessary capacity to provide the input current to all of
the combined sounder beacons connected to the line.
For ambient temperatures over +40ºC the cable entry
temperature may exceed +70ºC and therefore suitable heat
resisting cables and cable glands must be used, with a rated
service temperature of at least 110ºC
The dual cable gland entries have an M20 x 1.5 entry thread.
To maintain the ingress protection rating and mode of
protection, the cable entries must be fitted with suitably rated
ATEX / IECEx certified cable glands and/or suitably rated
ATEX / IECEx certified blanking devices during installation
according to EN / IEC60079-14.
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable glands
or blanking plugs.
For use in explosive dust atmospheres, a minimum ingress
protection rating of IP6X must be maintained.
The BEx combined sounder beacon range can be supplied
with the following types of adapters:
M20 to ½" NPT
M20 to ¾" NPT
M20 to M25
_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. D210-00-611-IS
Sounder Beacon
Voltage Range
Current Current
265mA 240mA 20 - 28Vdc
130mA 130mA 42 - 54Vdc
110mA 95mA 103.5-126Vac
56mA 48mA 207-253Vac
Issue 6 20-04-2020
It is important to note that stopping plugs cannot be fitted
onto adapters, only directly onto the M20 entries.
Any other adapters used must be suitably rated and ATEX /
IECEx certified adapters.
10) Earthing
Both AC and DC combined sounder beacon units must be
connected to an earth. The units are provided with internal
and external earth terminals, the internal earth terminal is
located in the sounder chamber section of the unit and the
external terminal is located on the beacon chamber.
Fig. 3a Internal View of Sounder Casting
2-off M20
Cable
Entries
Fig. 3b Internal View of Cover
When using the internal earth terminal ensure that the
stainless steel M4 flat washer is between the incoming earth
wire and the bracket.
Internal earthing connections should be made to the Internal
Earth terminal in the sounder casting using a ring crimp
terminal to secure the earth conductor under the earth clamp.
The earth conductor should be at least equal in size and
rating to the incoming power conductors.
External earthing connections should be made to the M5
earth stud, using a ring crimp terminal to secure the earth
conductor to the earth stud. The external earth conductor
should be at least 4mm² in size.
sales@e-2-s.com
www.e-2-s.com
Sheet 3 of 9
Internal
Earthing
Internal
Bonding
Wire
Terminal
Tel: +44 (0)208 743 8880
Fax: +44 (0)208 740 4200