__________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e2s.com Fax: +44 (0)208 740 4200
Document No. D211-00-611-IS-SC Issue: E 02-03-2020 Sheet 5 of 13
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- -
S2 S3
S2
S3
+
-
E
Stage four (S4) operation: Power +ve and –ve, link a -ve
supply line to both the S2 & S3 terminals.
Strobe will continue to flash during alarm horn S2, S3 & S4
stages.
Fig. 6 DC Terminals
10)
Earthing
The unit has both internal and external earth terminals,
(please see fig 2).
Internal earthing connections should be made to the internal
earth terminal on the PCBA, (please see fig 4 for AC, fig 6 for
DC). The earth conductor should be at least equal in size and
rating to the incoming power conductors. The internal earth
bonding wire connects the PCBA earth terminal to the internal
earth terminal in the enclosure back box.
External earth 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 4mm
2
in size. The external earth crimp ring should be
located between the two M5 plain washers provided and
securely locked down with the M5 spring washer and M5 nut.
11)
End Of Line Monitoring (DC Units Only)
On DxC2 DC units, dc reverse line monitoring can be used if
required. All DC units have a blocking diode fitted in their
supply input lines. 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 the following values:-
24V DC Alarm Horn and Strobe
Minimum Resistance 3k9 ohms
Minimum wattage 0.5W
Minimum Resistance 1k ohms
Minimum wattage 2.0W
48V DC Alarm Horn and Strobe
Minimum Resistance 15k ohms
Minimum wattage 0.5W
Minimum Resistance 3k9 ohms
Minimum wattage 2.0W
The resistor must be connected directly across the +ve and
-ve terminals of the sounder board, as shown in the following
drawing. Whilst keeping its leads as short as possible, a
spacing of at least 1/16 inch (1.58mm) must be provided
through air and over surfaces between uninsulated live parts.
Sounder EOL Beacon EOL
Fig. 7 End of Line Resistor Forming
Fig. 8b End of Line Resistor Placement – Sounder
For the Beacon, the resistor must be connected directly across
the +ve and -ve terminals as shown in the following drawing.
Form the resistor legs as shown in Fig. 7a, remove the +ve and
–ve terminal plugs and fit the resistor across the two terminal
plugs before refitting them to the PCBA as shown in Fig. 7b. A
spacing of at least 1/16” (1.58mm) must be provided through air
and over surfaces between uninsulated live parts.
Fig. 8b End of Line Resistor Placement - Beacon
12)
Setting
12.1 Volume Control
The alarm horn output level of the DxC2 unit can be set by
adjusting the volume control potentiometer (see Fig 2). For
maximum output, set the potentiometer fully clockwise.
Fig. 9 Location of field controls
Volume
Control
Tone Setting
Switches 1-6
(See tone
selection table)
End Of Line Resistor
-
+
DC Alarm Horn
Terminals
DC LED Terminals