E2S BExBGL1D Instruction Manual page 6

8) Power Supply Selection
The system power supply must have the necessary capacity
to provide the input current to all of the beacons connected to
the system.
The following table shows the input current taken by the
various beacons:-
Unit Type Nominal I/P
Voltage
BExBGL1D 10-50V DC
BExBGL1D 10-35V AC
BExBGL1D 230V AC
BExBGL1D 115V AC
The above table also shows the maximum voltages at which
the beacons can be operated.
9) Cable Selection
Cables must be capable of handling the current draw from all
of the unts on the line
SAFETY WARNING: If the BExBGL1D beacons are used at
high ambient temperatures, i.e. over +40ºC, then the cable
entry temperature may exceed +70ºC and therefore suitable
heat resisting cables must be used, with a rated service
temperature of at least 110ºC.
10) Earthing
Both AC and DC beacon units must be connected to a good
quality earth. The units are provided with internal and
external earthing terminals which are both located on the
terminal chamber section of the unit (see figures 2 and 3).
When using the internal earth terminal ensure that the
stainless steel M4 flat washer is between the incoming earth
wire and the enclosure.
When using the external earth terminal a cable crimp lug
must be used. The cable lug should be located between the
two M5 stainless steel flat washers. The M5 stainless steel
spring washer must be fixed between the outer flat washer
and the M5 stainless steel nut to ensure that the cable lug is
secured against loosening and twisting.
The internal earth bonding wire ensures that a good quality
earth is maintained between the flameproof chamber casting
and the flameproof cover casting.
11) Cable Glands
The BExBGL1D beacons have dual cable gland entries which
have an M20 x 1.5 entry thread as standard. Only cable
glands approved for Ex 'd' applications can be used, which
must be suitable for the type of cable being used and also
meet the requirements of the Ex 'd' flameproof installation
standard EN60079-14:2008 / IEC60079-14:2007.
When only one cable entry is used the other one must be
closed with an Ex 'd' flameproof blanking plug, which must be
suitably approved for the installation requirements.
_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. BExBGL1D (Gas-Dust) English
Input Max.
Current I/P Volts
400mA@24V 50V
812mA@20V 35V
65mA 253V
135mA 126V
Issue A (Four Sheets)
For combustible dust applications, the cable entry device and
blanking elements shall be in type of explosion protection
increased safety "e" or flameproof enclosure "d" and shall
have an IP 6X rating according to EN 60529.
SAFETY WARNING: If the BExBGL1D beacons are used at
high ambient temperatures, i.e. over +40ºC, then the cable
entry temperature may exceed +70ºC and therefore suitable
heat resisting cable glands must be used, with a rated service
temperature of at least 110ºC.
12) Cable Connections
See drawings C and D / wiring diagram E
13) Flash Pattern Selection and 2nd & 3rd Stages
The BExBGL1D LED beacons have 9 different flash patterns
including one ON state that can be selected for the first
stage. They can then be remotely switched to second and
third stage flash patterns. The flash patterns are selected by
pin headers on the pcb for both DC and AC units. The table
on page four shows the pin header positions for the nine
flash patterns and which patterns are available for the second
and third stages. To operate the led beacon on stage one
simply connect the supply voltage to the normal supply
terminals (+ve and –ve for DC units, L and N for AC units).
The operation of the second and third stages is different for
DC and AC units.
DC Units Second and Third Stage Selection
To change to the second stage flash pattern, simply connect
a -ve supply line to terminal S2, while maintaining the dc
supply to the +ve and –ve terminals. Similarly for the third
stage flash pattern, connect a -ve supply line to terminal S3.
The supply line to the S3 terminal will automatically override
a supply to the S2 terminal.
AC Units Second and Third Stage Selection
To select the second and third stage flash patterns on the
BExBGL1D AC beacons the Common (C) terminal on the
three way terminal block on the pcb is connected to the S2
terminal for the second stage tone and the S3 terminal for the
third stage tone.
14) End of Line Monitoring (DC Units)
On the BExBGL1D DC beacons, dc reverse line monitoring
can be used if required. All DC beacons have a blocking
diode fitted in their supply input lines. An end of line
monitoring diode or an end of line monitoring resistor can be
connected across the +ve and –ve terminals. If an end of line
resistor is used it must have a minimum resistance value of
3k3 ohms and a minimum wattage of 0.5 watts or a minimum
resistance value of 500 ohms and a minimum wattage of 2
watts.
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