Cable Glands; Safety Warning; Cable Connections - European Safety Systems BE S120D Serie Manual De Instrucciones

When using the internal earth terminal ensure that the
stainless steel M4 flat washer is between the incoming earth
wire and the enclosure.
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 wire ensures that a good quality
earth is maintained between the flameproof chamber casting
and the flameproof cover casting.
12)

Cable Glands

The BExS120D and BExS110D 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 '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 standards
EN 60079-14:2008 / IEC60079-14:2007.
SAFETY WARNING: If the high output BExS120D 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 110ºC.
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable gland.
When 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 electronic pcb assembly located in the flameproof
enclosure. See section 8 of this manual for access to the
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Internal Bonding
Wire Terminal
2 off M20
Cable Entries
Internal Earth Terminal
Figure 3
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flameproof enclosure. On the AC units a two-way terminal
block is provided for the live and neutral mains supply wires
and a three way terminal block is provided for linking the
second and third stages, (see figures 5 and 7). On the DC
units a four way terminal block is provided for +ve and –ve
supply input and second and third stage modes of operation,
(see figures 4 and 6).
BExS120D DC Sounder
Volume Control
DIP Switch
A single wire with a cross sectional area of up to 4mm² can
be connected to each terminal way or if an input and output
wire is required two 2.5mm² wires can be connected to each
terminal way. When 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.
BExS120D AC Sounder
Volume Control
DIP Switch
BExS110D DC Sounder
Volume Control
DIP Switch
DC Terminals
+
-
S3
S2
Stage Headers
Figure 4
Stage Terminals
C
AC Terminals
S3
S2
N
L
Figure 5
Stage Headers
S2
S3
-
+
DC Terminals
Figure 6