User's Manual

20 DL251 Audio System I/O
MUSIC Group IP Limited
DL251/DL252 Getting Started
2. Getting Started
This section shows you how to unpack, install, connect up,
switch on and configure the DL251/DL252 unit.
This equipment is supplied by a mains voltage that can
cause electric shock injury.
Before installing, setting up or operating this equipment,
make sure that you have read and fully understand all of
this section and the “Important safety instructions” at the
front of this manual.
Refer to additional safety information on the top cover of
the unit.
Unpacking
Carefully unpack your DL251/DL252 equipment package.
Then, inspect the DL251/DL252 unit carefully for any signs of
damage that may have occurred during transit and notify the
courier immediately if you discover any.
Check the contents of your DL251/DL252 equipment package.
If there are any parts missing, incorrect or faulty, please
contact your local distributor or Midas at the address at the
front of this manual.
Please retain the original packing in case you should need to
return the equipment to the manufacturer or supplier, or
transport or ship the unit later.
Installation
Before installing and operating this equipment, make sure it is
correctly connected to the protective earth conductor of the
mains voltage supply socket outlet through each mains lead.
Ideally a cool area is preferred, away from 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. Whenever possible,
keep the equipment out of direct sunlight.
Mount in rack only.
Power
Both supply cords must be unplugged to ensure
complete de-energisation of the unit.
The internal power supplies are of the switch mode type that
automatically senses the incoming mains voltage and will work
where the nominal voltage is in the range 100VAC to 240VAC.
Two mains inlets are provided on the rear panel. The correct
leads for connection in the area to which the unit was shipped
are supplied with the unit. The equipment should only be
plugged into the mains outlets using the supplied leads.
Each mains inlet must be sourced from its own separate
wall-mounted mains outlet socket. Otherwise, their mains
sources must be suitably distributed so as to meet local safety
regulations.
Make sure the Volex locking type plugs, fitted on each supplied
mains cable, are securely fitted to the mains IEC connectors
on the unit. When fitted properly the Volex plug locks into
place, preventing it from working loose, or being inadvertently
knocked loose or pulled out. When fitting or removing a Volex
plug, always hold the plug itself and never use the cable, as
this may damage it. Never insert or remove an electric plug
with wet hands.
When switching the unit on/off, switch the mains power
switches on/off one at a time. Do not switch them on/off
simultaneously.
Handling the equipment
When lifting or moving the equipment, always take its size and
weight into consideration.
Completely isolate the equipment electrically and disconnect
all cables from the equipment before moving it.
Do not insert your fingers or hands in any gaps or openings on
the equipment, for example, vents.
Electric fields
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).
Connecting up
Connect up the rear panel of your unit as follows (see
Chapter 5. Connections on page 34):
• Inputs — connect your XLR mic/line inputs (up to 48 on
DL251 and 16 on DL252).
• Outputs — connect your XLR line outputs (up to 16 on
DL251 and 48 on DL252).
• AES50 audio — connect the AES50 audio sockets to the
console/snake.
• Ethernet — connect the Ethernet control socket to an
external computer for remote control when used in a snake
configuration if required.
• MIDI — connect the three MIDI 5-pin DIN connectors to the
MIDI equipment if required. (For use with Midas consoles
only.)
• Mains power — connect the dual redundant IEC
connectors of the mains cables into the rear of the unit and
then plug them into separate mains power outlets (see
EN