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European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e2s.com Fax: +44 (0)208 740 4200
Document No. D157-00-201 Issue 3 25-06-20 Sheet 4 of 4
(4)
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 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).
Terminals
GNExL2 (25W) GNExL1 (15W)
A - B
25W
15W
A - C
12.5W
7.5W
A - D
6W
3W
A - E
2W
1W
A single solid or stranded 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.
Wire insulation needs to be stripped 6-7mm. Wires may be
fitted securely with crimped ferrules. Terminal screws need to
be tightened down with a tightening torque of 0.56Nm / 5 Lb-in.
The unit will be set as standard to 100V line. But can be easily
altered to 70V line by moving the red selection cable from the
100V line terminal to the 70V line terminal (see figure 4 for
position).
GNExL2 and GNExL1 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).
14)
End of Line DC Monitoring
On GNExL2 and GNExL1 loudspeakers, dc line monitoring can
be used if required. Both the 70V and 100V Line units and the
Low Impedance units have blocking capacitors 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).
Figure 4
Figure 5
GNExL2 and GNExL1 70V and 100V Line Loudspeakers
GNExL2 and GNExL1 8 ohm and 16 ohm Loudspeakers
- - + +
Link
Power Setting
Terminals A - E
70/100V Line
Setting Terminal