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12.2 Coupling Zone Relay Modules
When more than 1 Zone Relay Module is
used in a system, the inputs of the modules
may be linked together (fig.12.2), so that the
same amplifier(s) can feed up to 18
loudspeaker zones. This is done by making
short linking wires, fitted with Mate-N-Lok
connector pins at each end. One end is
pushed into one of the centre row of
termination sockets in the first ‘Input’ Mate-
N-Lok connector plug (I).
The other end is pushed into the
corresponding right row of termination
sockets in the second ‘Input’ Mate-N-Lok
connector plug (H), and if applicable also
connected to the third ‘input’ Mate-N-Lok
connector plug (G).
12.3 Multiple Amplifier Configurations
In large systems, comprising many
loudspeakers, it may be necessary, because
the large amount of amplifier power
required exceeds the power available, to use
extra power amplifiers. This can be done in
one of several different ways:
- Unlinked multiple modules.
Separate amplifiers may be used to feed each
Zone Relay Module. This enables each
amplifier to be dedicated to 6 specific zones.
- Module input splitting
(fig.12.3).
The Zone Relay Module provides the
possibility of connecting more amplifiers to
a single module, so that each amplifier feeds
fewer loudspeaker zones. Three miniature
fuses, link the centre and left rows of sockets
of each of the Call, Music, and (common)
Ground sockets of the amplifier input
connector (fig.12.1).
If one of the fuses is removed, the amplifier
connected to the corresponding (right)
socket will only feed sockets 1-4 of the LS
output connector.
Another amplifier, connected to the
corresponding left socket, will then feed only
sockets 5 and 6 of the LS output connector.
Fig. 12.2 - Coupling zones
G
18
16
17
3
6
21
4
5
7
89
101112
I
3
2
1
4
LS GROUP
CALL
MUSIC
5
6
H
10
11
12
9
8
7
3
6
2
1
4
5
7
8
9
101112
14
13
15
3
6
21
4
5
78
9
101112
3
6
21
4
5
78
9
101112
3
6
2
1
4
5
7
8
9
101112
3
6
2
1
4
5
789
101112
GB/SM 30 user manual 5/26/98 10:18 AM Page 31