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European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)20 8743 8880
www.e2s.com Fax: +44 (0)20 8740 4200
Document No. IS 2427-P Issue B 17-04-02 Sheet 3 of 4
W hen using the external earth terminal a cable crimp lug must
be used. The cable lug should be located between the two M5
stainless steel flat washers. The M5 stainless steel spring
washer must be fixed between the outer flat washer and the
M5 stainless steel nut to ensure that the cable lug is secured
against loosening and twisting.
The internal earth bonding wire ensures that a good quality
earth is maintained between the flameproof chamber casting
and the flameproof cover casting.
12)
Cable Glands
The BExTS110D Sontels have dual cable gland entries which
have an M20 x1.5. Only cable glands approved for Ex ‘d’
applications can be used, which must be suitable for the type
of cable being used and also meet the requirements of the Ex
‘d’ flameproof installation standard BS EN 60079-14 : 1997.
SAFETY WARNING: If the BExTS110D Sontels are used at
high ambient temperatures, i.e. over +40ºC, then the cable
entry temperature may exceed +70ºC and therefore suitable
heat resisting cable glands must be used, with a rated service
temperature of at least 95ºC.
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable gland.
W hen only one cable entry is used the other one must be
closed with an Ex ‘d’ flameproof blanking plug, which must be
suitably approved for the installation requirements.
13)
Cable Connections
The cable connections are made into the terminal blocks on
the Sontel pcb assembly located in the flameproof enclosure.
See section 8 of this manual for access to the flameproof
enclosure. The printed circuit board has two terminal blocks,
one for the mains supply input voltage and one for the
telephone signal input cable (see figure 4). The mains input
cable should enter the enclosure via one of the M20 cable
entries and be connected to the supply terminals L and N and
the telephone signal cable should enter the enclosure via the
other M20 entry and be connected to the telephone terminal.
A single wire with a cross sectional area of up to 4mm² can be
connected to each terminal way. W hen connecting wires to the
terminals great care should be taken to dress the wire 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 and above.
14)
Tone Selection
The BExTS110D Sontels have 32 different tones that can be
selected by the DIP switches on the sounder pcb (see figure
4). The tone table on page four shows the switch positions for
the 32 tones.
15)
Pulse Tone Operation
The BExTS110D Sontel has two modes of operation
continuous tone operation and pulsed tone operation. To
select continuous tone operation the pulse tone header pins
should not be shorted (see figure 4). In this mode the output
tone will be as per the tone table. To select pulse tone
operation the pulse tone header pins should be shorted (see
figure 4). In this mode of operation the selected tone pattern
will pulse on and off following the telephone input signal. Note
if pulsed tone operation is selected it is advisable not to select
any of the intermittent tones, such as tone 11.
16)
Volume Control
T
he BExTS110D Sontel, has a volume control to adjust the
output level. To set the required output level, adjust the
potentiometer on the sounder pcb (see figure 4). For maximum
output level the potentiometer should be set to the fully
clockwise position.
2 off M20
Cable Entries
Internal Earth Terminal
Figure 3
Internal Bonding
Wire Terminal
Figure 4
BExTS110D Sontel
DIP Switch
Volume Control
Telephone Signal
Input Terminals
Mains Supply
Input Terminals
L and N
Pulse Tone
Header Pin
