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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 2466 Issue E 19-03-10 Sheet 4 of 5
Cover
Beacon
PCB
Chamber
Beacon
PCB
Chamber
Beacon
PCB
Unit No. 1
Unit No. 2
Unit No. 3
Cover
Beacon
PCB
Chamber
Beacon
PCB
Cover
Beacon
PCB
+
-
+
-
+
-
+ -
+ -
+ -
+ -
+ -
+ -
-
+
terminals and two -ve terminals for the input and output
wiring.
Wires having a cross sectional area of up to 4mm² can be
connected to each terminal way. When connecting wires to
the terminals great care should be taken to dress the wires so
that wires do not exert excess pressure on the terminal
blocks. This is particularly important when using cables with
large cross sectional areas such as 2.5mm² and above.
12)
End of Line Monitoring (DC Units)
On BExCBG05-05D DC units, dc reverse line monitoring can
be used if required. All DC units have a blocking diode fitted
in their supply input lines on both beacon sections. 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 min. wattage of
2 watts. If the beacon sections are wired to separate power
supplies then an end of line monitoring component can be
used in each section.
13)
Synchronised Operation
All BExCBG05-05D units that are connected to the same
supply line will have a synchronised flash rate at one flash
every second. To ensure that the units will be synchronised
check that the pin header is not fitted, i.e. the two header pins
are not shorted together (see Figures 4 and 5).
14)
Flip / Flop Operation
The two beacon sections can be set to form a flip-flop
operation, where the beacons will flash alternately. To
achieve this mode of operation, fit a pin header to the flip-
flop header pins on one of the electronics board, i.e. the two
header pins are shorted together, (see figures 4 to 6). The
first flash on the beacon that has the header fitted will be
delayed by ½ second. The two beacons will then flash
alternately every ½ a second.
L
L
N
N
Figure 4
AC Input
Terminals
BExCBG05-05D AC Cover Beacon Section
BExCBG05-05D DC Cover Beacon Section
DC Input
Terminals
Figure 5
-
-
+
+
Flip / Flop
Pin Header
Flip / Flop
Pin Header
BExCBG05-05D Chamber Beacon Section
Supply
Terminals
Figure 6
Flip / Flop
Pin Header
Interconnecting Terminals to
chamber beacon pcb (simultaneous or
flip flop mode of operation)
Interconnecting Terminals to
chamber beacon pcb (simultaneous or
flip flop mode of operation)
BExCBG05-05D DC Combined Beacon Unit
Beacons Wired for Simultaneous (or if the header link is in place
on one of the pcb’s) Flip Flop Operation (see sections 14 and 15)