_______________________________________________________________________________________________________________________________
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. BExL25D and BExL15D English Issue E (Four Sheets) 12-02-10 (6
)
BExL15D
100V Line
15W
100V
BExL15D
70V Line
15W
70V
BExL15D
8 ohm
15W
10.95V
BExL15D
16 ohm
15W
15.49V
The above table also shows the maximum AC signal voltages
at which the loudspeakers can be operated.
The current levels taken by the each loudspeaker will depend
on which output tapping has been selected (see section 13 of
this instruction manual). BExL25D 100V & 70V Line units
have output levels of 25W, 12.5W, 6W and 2W, BExL15D
100V & 70V Line units have output levels of 15W, 7.5W, 3W
and 1W.
10) Cable Selection
Cables must be capable of handling the current drawn from
all of the units on the line.
SAFETY WARNING: If the high output BExL25D
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.
11) Earthing
Loudspeakers 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 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.
12) Cable Glands
The sounders have dual cable gland entries with M20 x1.5
entry threads. 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 EN60079-14:2008 /
IEC60079-14:2007.
SAFETY WARNING: If the high output BExL25D
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.
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
Terminals
BExL25D (25W) BExL15D (15W)
A - B
25W
15W
A - C
12.5W
7.5W
A - D
6W
3W
A - E
2W
1W
See drawings C and D / wiring diagram E
14) End of Line DC Monitoring
On BExL25D and BExL15D loudspeakers, dc line monitoring
can be used if required. Both the 100V & 70V Line units and
the Low Impedance units have a blocking capacitor fitted. It
should be noted that each loudspeaker has a 1M ohm bleed
resistor connected across the blocking capacitor and this
should be taken into account when selecting the value of the
end of line monitoring resistance.
The end of line monitoring resistor can be connected across
the terminals on the end of line unit. On the low impedance
units care must be taken with the polarity of the monitoring
voltage.
On 100V and 70V line units the end of line resistor used must
have a minimum resistance value of 4k7 ohms and a
minimum wattage of 2.5 watts
On low impedance units the end of line resistor used must
have a minimum resistance value of 2k ohms and a minimum
wattage of 0.5 watts or a minimum resistance value of 500
ohms and a minimum wattage of 2 watts. On the low
impedance units care must be taken with the polarity of the
monitoring voltage. If an end of line resistor is fitted to a unit
the links on the printed circuit boards of all loudspeakers in
the line must be cut for the dc blocking capacitors to be in
circuit in order to dc monitor the line (see figure 5).
