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While the 10 metre cable provided is adequate for most installations, longer
cables are available to order, or screened twin cable may be used on the
connector supplied, up to a maximum of 30 meters.
In long cable runs, take special care to separate the microphone signal cable
from electric power cables, especially those to fluorescent light fittings.
Wiring to the Orange Beacon
The Orange beacon warning light should be connected to the GA904 main
body using 2-core cable rated at 1A. The connections are:
J9/1
J9/2
Auxiliary Contact Wiring
A normally closed door contact may be wired to the GA904 such that if the
door is opened the GA904 will trip.
The connections are:
J8/1
J8/2
Note that the unit is supplied with a shorting link between these connections.
The link must be kept in place if the door contact feature is not used. The link
should be removed if a door switch is used.
Power Wiring to the GA904
No additional items are required if the control box can be conveniently wired
into the mains circuits(s) which supply all the amplifiers in use. The simplest
installation is made by taking power from a wall socket which normally
supplies the amplifiers. Where possible the unit should be fed from a
switched junction box, fused at the current capacity of the cable, and the
output of the GA904 then taken to all the available sockets on the stage. In
this way any visiting discotheque or group can only use the controlled sockets.
The GA904 should be wired to the main power supply by a qualified
installation engineer. See earlier warning. The power cable should be fed in
through the far right hand gland nut and screwed firmly to the right hand
connector block.
Controlled power output to the stage is taken from the left hand connector
block and fed through a gland to the left of the power input. See figure 3.1.
