Operation Manual

xii Precautions
DL451 Modular I/O
Operator Manual
contact. The electrical supply at the socket
outlet must provide appropriate
over-current protection.
• Both the mains supply and the quality of
earthing must be adequate for the
equipment.
• Before connecting up the equipment, check
that the mains power supply voltage rating
corresponds with the local mains power
supply. The rating of the mains power
supply voltage is printed on the equipment.
• Mount in rack only.
Location
• Ideally a cool area is preferred not in close
proximity to power distribution equipment
or other potential sources of interference.
• Do not install the equipment in places of
poor ventilation.
• Do not install this equipment in a location
subjected to excessive heat, dust or
mechanical vibration. Allow for adequate
ventilation around the equipment, making
sure that its fans and vents are not
obstructed. To prevent excessive heating of
the equipment, avoid mounting it directly
above power amplifiers or other devices
that radiate significant amounts of heat
such as, radiators and heaters. Keep the
equipment out of direct sunlight.
• Do not place the equipment in an unstable
condition where it might accidentally fall
over.
• Make sure that the mains voltage and fuse
rating information of the equipment will be
visible after installation.
Audio connections
To ensure the correct and reliable operation of
the equipment, only high quality balanced,
screened, twisted pair audio cable should be
used.
XLR connector shells should be of metal
construction so that they provide a screen
when connected to the console and, where
appropriate, they should have Pin 1 connected
to the cable screen.
Radio frequency
interference — Class A
device
This equipment has been tested and found to
comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide
reasonable protection against harmful
interference when the equipment is operated
in a commercial environment. This equipment
generates, uses, and can radiate radio
frequency energy and, if not installed and used
in accordance with the instruction manual,
may cause harmful interference to radio
communications. Operation of this equipment
in a residential area is likely to cause harmful
interference in which case the user will be
required to correct the interference at his own
expense.
Electric fields
Caution:
In accordance with Part 15 of the FCC
Rules & Regulations, “… changes or
modifications not expressly approved by
the party responsible for compliance
could void the user's authority to operate
the equipment.”
Should this product be used in an
electromagnetic field that is amplitude
modulated by an audio frequency signal (20Hz
to 20kHz), the signal to noise ratio may be
degraded. Degradation of up to 60dB at a
frequency corresponding to the modulation
signal may be experienced under extreme
conditions (3V/m, 90% modulation).
Operation
To avoid electrical shock, never operate the
equipment with the covers removed.
Safety equipment
Never remove, for example, covers, housings
or any other safety guards. Do not operate
the equipment or any of its parts if safety
guards are ineffective or their effectiveness
has been reduced.