Allen&Heath GL2400 - Manual (Page 11)

GL2400 User Guide 11
Connecting Power
Read and understand the Important Safety Instructions printed at the start of this guide,
and the warnings printed on the rear of the console. Check that the console power supply
mains voltage input is the same as your local supply. Check that the correct mains lead
with moulded plug has been provided with your console. Make sure that the IEC mains
plug is pressed fully into the panel socket before switching on.
Grounding
The connection to ground in an audio system is important for two reasons:
1. SAFETY - To protect the operator from high voltage electric shock, and
2. AUDIO PERFORMANCE - To minimise the effect of ground (earth) loops which result in
audible hum and buzz, and to shield the audio signals from interference.
For safety it is important that all equipment grounds are connected to mains ground so that
exposed metal parts are prevented from carrying high voltage which can injure or even kill
the operator. Do not disconnect the ground connection in the mains lead. It is
recommended that the system engineer check the continuity of the safety ground from all
points in the system including microphone bodies, turntable chassis, equipment cases,
rack metalwork and so on.
Switching the console on and off
It is good practice to turn power amplifiers off before switching the console and any other
connected equipment on or off. This prevents any unexpected clicks or thumps when the
equipment is powered up.
Turn amplifiers and powered speakers on last and off first.
To turn the console on, press the ON/OFF switch next to the IEC mains input socket. To
turn the console off, press this switch again.
Connecting a backup supply
A socket is included for plugging in an optional backup power supply. This provides the
reassurance of power supply dual redundancy, a feature usually found only on expensive
top end consoles. The console uses diode combining technology so that both supplies
can be powered at the same time. One will automatically take over should the other stop
working. The recommended backup supply for the GL2400 16, 24 and 32 models is the
Allen & Heath MPS12 power unit. The recommended backup supply for the 40 channel
model is the Allen & Heath RPS11 power unit.
Only plug the recommended Allen & Heath power unit into this socket. Do not
attempt to modify any other power unit to work with the console. Do not attempt to modify
or extend the DC power cable that comes with the supply.
The console can work with just the internal supply powered by mains, or just the backup
supply, or with both powered at the same time. To ensure uninterrupted performance in
the unlikely event of a failure, we recommended that both supplies are powered.
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR.
THIS APPARATUS MUST BE EARTHED BY THE POWER CORD.
ATTENTION: REMPLACER LE FUSIBLE AVEC UN DES MEMES CARACTERISTIQUES.
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE FUSE WITH SAME TYPE AND RATING.
T1.6A L 250V 20MM
ON/OFF
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
I FUSE
MAINS INPUT
100 - 240 V AC ~ 47- 63 Hz 90W MAX
0
SERIAL NUMBER
EXT DC IN
EXT INT
ACTIVE POWER SUPPLY
USE ONLY THE RECOMMENDED A&H BACKUP POWER SUPPLY