E2S BExCS110-L2D-P Series, Instruction Manual

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European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH www.e2s.com Tel: +44 (0)208 743 8880
Document No. D210-00-611-IS Issue 9 12-09-2022 Sheet 5 of 7
12. DC Wiring
Fig. 5 DC Terminals
12.1 Stage Switching Polarity (DC Units Only)
The BExS110D DC sounders have the facility to use ve
or –ve switching to change the tone to the second and third
stages. Negative switching is the default setting. For –ve
switching connect the two headers on the pcb to the left-hand
(marked –ve) and centre pins. For +ve switching connect the
headers to the right hand (ve) and the centre pins.
(Refer to Fig. 6)
Fig. 6 Stage Switching Polarity
12.2 Line Monitoring
On BExS110D DC units, dc reverse line monitoring can be
used if required. All DC sounders 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 3k3Ω and a minimum
power rating of 0.5 watts or a minimum resistance value of
500Ω and a minimum power rating of 2 watts.
The resistor must be connected directly across the +ve and -
ve terminals as shown in the following drawing. The resistor
leads should be kept as short as possible.
Fig. 7a End of Line Resistor Placement for Sounder
Board
Fig. 7b End of Line Resistor Placement for Beacon
Board
13
Wiring the combined sounder/beacon for
simultaneous operation
The sounder and beacon sections can be wired to the same
input supply so that they operate simultaneously or they can
be wired to separate input supplies so they can be operated
independently (refer to wiring diagrams D210-06-611 & D210-
06-615).
If the sounder and beacon sections are connected to the same
input supply. The incoming cables should be connected to the
input terminals on the beacon board and the two link wires,
that are supplied with the unit, should be used to link the supply
from the interconnecting terminals on the beacon board down
to the supply terminals on the sounder board.
End of Line Resistor
Volume Control DIP Switch
Stage Headers
Negative Switching
Positive Switching
A ti t d
Header Pin Location
Header Pin Location
S2
S3
-
+
-
+
-
+
+
+
-
-
S2
S3