European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D209-00-001-IS
Issue 1
20-08-22
Sheet 4 of 5
screws, spring and plain washers in the order shown above
and tighten down.
7) Selection of Cable, Cable Glands, Blanking
Elements & Adapters
When selecting the cable size, consideration must be given
to the input current that each unit draws (see Table 1), the
number of sounders on the line and the length of the cable
runs. The cable size selected must have the necessary
capacity to provide the input current to all of the sounders
connected to the line.
The dual entries can be ordered with one of the following
options:
2-off M20 x 1.5 thread
2-off ½” NPT thread
1-off M20 x 1.5 & 1-off ½” NPT thread
To maintain the ingress protection rating and mode of
protection, the cable entries must be fitted with suitably rated,
certified cable entry and/or blanking devices during
installation.
For ambient temperatures over +40ºC the cable entry
temperature may exceed +70ºC or the cable branching
temperature may exceed +80ºC. Therefore suitable heat
resisting cables and cable glands must be used as per table
below
Ambient Temp.
40ºC
45ºC
50ºC
55ºC
Min. Rating of cables
and cable glands
90ºC
95ºC
100ºC 105ºC
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable glands
or blanking plugs.
For use in explosive dust atmospheres, a minimum ingress
protection rating of IP6X must be maintained.
For use in explosive gas atmospheres, a minimum ingress
protection rating of IP54 must be maintained.
8) Cable Connections
Electrical connections are to be made into the terminal blocks
on the PCBA located in the enclosure. See section 5 of this
manual for access to the enclosure.
Wires having a cross sectional area between 0.5 mm² to
2.5mm² can be connected to each terminal way. If an input
and output wire is required the 2-off Live/Neutral or +/-
terminals can be used. If fitting 2-off wires to one terminal
way the sum of the 2-off wires must be a maximum cross
sectional area of 2.5mm². Strip wires to 8mm. Wires may also
be fitted using ferrules. Terminal screws need to be tightened
down with a tightening torque of 0.45 Nm / 5 Lb-in. When
connecting wires to the terminals great care should be taken
to dress the wires so that when the cover is inserted into the
chamber the 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.
9) AC Wiring
A 6-way terminal block is provided on the AC Sounder for
power. There are 2-off Live, 2-off Neutral and 2-off Earth
terminals in total. A 3-way terminal is provided for stage
switching with a stage 2, a stage 3 and a common terminal.
Fig. 4 AC Terminals
Refer to schematic document D209-06-001 for further detail
on stage switching and terminal connections.
10) DC Wiring
A 10-way terminal block is provided on the DC Sounder.
There are 2-off +ve, 2-off -ve, 2-off stage 2, 2-off stage 3 and
2-off Earth terminals in total.
Fig. 6 DC Terminals
For further detail, refer to schematic document D209-06-001.
10.1
Line Monitoring
On E2xS1 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 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
48V DC
Volume
Control
DIP Switch
DIP Switch
Volume Control
S3
S2
C
E
N
L
S3
S2
-
+
E
24V DC
Volume
Control
