E2S BExL25D Manual De Instrucciones página 3

11)
Earthing
All loudspeakers must be connected to a good quality earth.
The units are provided with internal and external earthing
terminals which are both located on the flameproof cover
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 wire ensures that a good quality
earth is maintained between the flameproof chamber casting
and the flameproof cover casting.
12)
Cable Glands
The BExL25D and BExL15D loudspeakers 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 standard
BS EN 60079-14 : 1997.
SAFETY WARNING: If the loudspeakers 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.
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 pcb assembly located in the flameproof enclosure. See
section 8 of this manual for access to the flameproof
enclosure. The 100V Line loudspeakers are fitted with a five
way terminal block. Terminal A is common and one of the
_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. IS 2423-P Issue B
Internal
Bonding Wire
Terminal
2 off M20
Cable Entries
Internal Earth Terminal
Figure 3
17-04-02 Sheet 3 of 4
other terminals B, C, D or E should be selected depending on
what output level is required (see table below).
BExL25D and BExL15D 100V Line Loudspeakers
Terminals BExL25D (25W)
A - B 25W
A - C 12.5W
A - D 6W
A - E 2W
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.
BExL25D and BExL15D 8 ohm and 16 ohm Loudspeakers
BExL25D and BExL15D 8 ohm and 16 ohm low impedance
loudspeakers have dual input terminals on the pcb assembly
for input and output wiring. A cable of up to 2.5mm² can be
connected to each terminal. If dc line monitoring is used cut
the link on the board (see figure 5 and section 14 of this
manual).
sales@e2s.com
www.e2s.com
E
D
C
B
A
Figure 4
BExL15D (15W)
15W
7.5W
3W
1W
Link
- - + +
Figure 5
Tel: +44 (0)208 743 8880
Fax: +44 (0)208 740 4200
)
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