European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D209-00-511-IS
Issue 1
20-08-22
Sheet 5 of 7
--
++ S2 S3
Fig. 6a DC Sounder Terminals
Fig. 6b beacon DC Terminals
11.2 Line Monitoring
On E2xC1LD2 DC units, DC reverse line monitoring can be
used if required. All DC sounders and beacons 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:
Min. Resistance
Min. Power
24V DC
3.9KΩ
0.5W
1KΩ
2W
48V DC
15KΩ
0.5W
3.9KΩ
2W
11.2.1 Sounder Line Monitoring
The resistor must be connected directly across the +ve and
-ve terminals as shown in the following drawing. Whilst
keeping its leads as short as possible, a spacing of at least
1/16” (1.58mm) must be provided through air and over
surfaces between uninsulated live parts.
Fig. 8 End of Line Resistor Placement
11.2.2 Beacon Line Monitoring
(Independent Beacon and Sounder Operation Only)
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. 9a, 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. 9b.
A spacing of at least 1/16” (1.58mm) must be provided
through air and over surfaces between uninsulated live parts.
Fig. 9a End of Line Resistor Forming
Fig. 9b End of Line Resistor Placement
12. Settings
12.1 Tone Selection
The sounders have 45 different tones that can be selected for
the first stage alarm. The sounders can then be switched to
sound second and third stage alarm tones. The tones are
selected by operation of a DIP switch on the PCB for both DC
and AC units. The tone table on page six shows the switch
positions for the 45 tones and which tones are available for
the second and third stages. To operate the sounder on
stage 1 simply connect the supply voltage to the normal
supply terminals (+ve and –ve for DC units, L and N for AC
units).
End of Line Resistor
48V DC
Volume
Control
DIP Switch
S3
S2
-
+
E
24V DC
Volume
Control
End of Line Resistor
