Safety Warning - E2S BExS120E Manual De Instrucciones

BExS110E 24V DC
BExS110E 12V DC
BExS110E 48V DC
BExS110E 230V AC
BExS110E 110V AC
BExS110E 115V AC
The input current will vary according to the voltage input level
and the frequency of the tone selected. The current levels
shown above are for the 440Hz Continuous tone @ nominal
input voltage. The 24V and 48V DC units and the 230V AC,
115V AC and 110V AC units have a switching voltage
regulator circuit and therefore the input current level will
decrease slightly as the input voltage in increased and will
increase slightly as the input voltage is reduced. The 12V
units do not have a voltage regulator and therefore their input
current will increase when the input voltage is increased.
The above table also shows the maximum voltages at which
the sounders can be operated.
11) Cable Selection
When selecting the cable size consideration must be given to
the input current that each unit draws (see table above), 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.
SAFETY WARNING: If the high output BExS120E sounders
are used at high ambient temperatures, i.e. over +40ºC, then
the cable entry temperature may exceed +70ºC and therefore
suitable heat resisting cables must be used, with a rated
service temperature of at least 95ºC.
12) Earthing
Both AC and DC sounder units must be connected to a good
quality earth. The units are provided with internal and
external earthing terminals which are both located on the
terminal chamber section of the unit (see figures 2 and 3).
When 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 wires ensure that a good quality
earth is maintained between the flameproof chamber casting,
the terminal section casting and the terminal cover casting.
13) Cable Glands
The BExS120E and BExS110E sounders have dual cable
gland entries which have an M20 x1.5 entry thread as
standard or a PG13.5 thread as a special. Only cable glands
approved for Ex 'e' applications or better (i.e. Ex 'd'
applications) can be used. They must be suitable for the type
of cable to be used and also meet the requirements of the Ex
equipment installation standard BS EN 60079-14: 1997.
SAFETY WARNING: If the high output BExS120E sounders
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.
_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. IS 2422-P
265mA
195mA
130mA
56mA
93mA
110mA
Issue B 17-04-02
30V
If a high IP (Ingress Protection) rating is required then a
15V
suitable sealing washer must be fitted under the cable gland.
58V
264V
When only one cable entry is used the other one must be
121V
closed with an Ex 'e' blanking plug, which must be suitably
126V
approved for the installation requirements.
14) Cable Connections
The cable connections are made into an EEx e II approved
twelve way terminal block which is located in the Increased
Safety Area terminal chamber (see figure 3). See section 9 of
this manual for access to the terminal chamber. When wiring
into Increased Safety Area terminal enclosures, you are only
permitted to connect one wire into each way on the terminal
block. Therefore in order that sounders can be connected in a
parallel line, the terminal block is fitted with approved
connecting combs so that each electrical connection has two
terminals in parallel. Terminal No's. 1 and 12 must not be
used on either AC or DC sounders. Cables with a cross-
sectional area of up to 4mm² can be connected to the
terminal block. Cables that have a small cross-sectional area
should be fitted with crimp ferules.
The wiring connections to the sounders are the same for both
the BExS110E units and
follows:-
Terminal No's
15) Tone Selection and 2
The BExS120E and BExS110E sounders have 32 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 in the flameproof enclosure for both
DC and AC units (see figures 4 and 5). For access to the
flameproof enclosure see section 8 of this instruction manual.
The tone table on page four shows the switch positions for
the 32 tones and which tones are available for the second
and third stages. To operate the sounder on stage one simply
connect the supply voltage to the normal supply terminals
(+ve and –ve for DC units, L and N for AC units), see
connection detail in section 12 of this instruction manual.
The operation of the second and third stages is different for
DC and AC units.
DC Units Second and Third Stage Tone Selection
The BExS120E and BEx110E DC sounders have the facility
to use either +ve or –ve switching to change the tone to the
second and third stages. 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
(marked +ve) and the centre pins. To change to the second
stage tone, connect either a -ve or +ve supply line to terminal
S2 in the terminal chamber, depending on which switching
mode is being used, while maintaining the dc supply to the
+ve and –ve terminals. Similarly for the third stage tone,
connect a -ve or +ve supply line to terminal S3. The supply to
Sheet 3 of 4
BExS120E units and are as
DC Units
2 and 3 Not Used
4 and 5 +ve
6 and 7 -ve
8 and 9 S2
10 and 11 S3
nd
& 3
sales@e2s.com
www.e2s.com
AC Units
S3
S2
C
N
L
rd
Stage Alarms
Tel: +44 (0)208 743 8880
Fax: +44 (0)208 740 4200
(3)