__________________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e-2-s.com Fax: +44 (0)208 740 4200
Document No. IS 2453-P Issue E 12-03-10 Sheet 3 of 4
The current levels taken by the each loudspeaker will depend
on which output tapping has been selected (see section 13 of
this instruction manual). BExDL25D 70V and 100V Line units
have output levels of 25W, 12.5W, 6W and 2W; BExDL15D
70V and 100V Line units have output levels of 15W, 7.5W, 3W
and 1W.
9)
Cable Selection
When selecting the cable size consideration must be given to
the current that each unit draws, the number of loudspeakers
on the line and the length of the cable runs.
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 cables must be used, with a rated service
temperature of at least 110ºC.
10)
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 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.
11)
Cable Glands
The BExDL25D and BExDL15D loudspeakers have dual cable
gland entries which have an M20 x 1.5 entry thread as
standard. 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 EN 60079-142008 / IEC60079-14:2007.
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.
For combustible dust applications, the cable entry device and
blanking elements shall be in type of explosion protection
increased safety "e" or flameproof enclosure "d" and shall have
an IP 6X rating according to EN60529:1992.
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 110ºC.
12)
Cable Connections
The cable connections are made into the terminal blocks on
the pcb assembly located in the flameproof enclosure. See
section 7 of this manual for access to the flameproof
enclosure. The 70V and 100V Line loudspeakers are fitted with
a five way terminal block. Terminal A is common and one of
the other terminals B, C, D or E should be selected depending
on what output level is required (see table below).
A
B
C
D
E
Terminals
BExDL25D (25W) BExDL15D (15W)
A - B
25W
15W
A - C
12.5W
7.5W
A - D
6W
3W
A - E
2W
1W
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.
2 off M20
Cable Entries
Internal Earth Terminal
Figure 3
Internal Bonding
Wire Terminal
Figure 4
BExDL25D and BExDL15D 70V and 100V Line Loudspeakers