Alesis ADAT-HD24 FirePort 1394, Reference Manual

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connections • chapter 2
20
ADAT HD24 Reference Manual
Power
Make sure you read the initial Important
Safety Instructions chapter at the front of this
manual.
AC Power Hookup
With the POWER switch on the REAR
PANEL of the ADAT HD24 turned OFF
, plug
the female end of the power cord into the HD24’s
POWER INPUT
socket and the male (plug) end into a
good quality, noise-free AC power source of the
proper rating.
It’s good practice to not turn on the HD24 until all
other audio cables are hooked up as well.
Make sure your amplifier or powered
speakers are switched off when turning the
HD24 on or off to avoid damage.
The ADAT HD24 works with any standard line
voltage from 90 to 240 volts and comes with a
detachable AC line cord suitable for the country to
which the unit is shipped.
AC Grounding
The line cable is an IEC-spec AC power cable
designed to be connected to a grounded 3-pin
outlet, with the third, round pin connected to
ground. Do not substitute any other type of AC
cord; IEC-spec cables of various lengths may be
purchased from electronics stores or your Alesis
dealer.
The ground connection is an important safety
feature designed to keep the chassis of electronic
devices such as the ADAT HD24 at ground
potential. Unfortunately, the presence of a third pin
does not always indicate that an outlet is properly
grounded. You may use an AC line tester to
determine this. If the outlet is not grounded, consult
with a licensed electrician. When AC currents are
suspected of being highly unstable in VAC and Hz,
a professional power conditioner should be used.
Do not operate any electrical equipment with
ungrounded outlets. Plugging the ADAT
HD24 into an ungrounded outlet, or “lifting”
the unit off ground with a three-to-two wire
adapter, can create a hazardous condition.
Alesis cannot be responsible for problems
caused by using the ADAT HD24 or any
associated equipment with improper AC
wiring.
To use the ADAT in another country:
The ADAT HD24 has what's called a "switching
power supply". That means it works with
any
AC
voltage from 90 to 250 volts, 50 to 60 Hz. This
eliminates the need for transformers or voltage
switches when you travel from country to country.
Your HD24 was supplied with the correct power
cord for your country or local area. If you plan to
travel with it to another country, obtain an IEC-spec
AC power cable compatible with the outlets used in
the other country and use it in place of the supplied
cable. The following alternative power cords are
approved for use with it:
• For 90-120 VAC 50/60 Hz operation in the US,
Canada and/or Japan, use Alesis UL/CSA
power cord #7-41-0001.
• For 240 VAC 50 Hz operation in England, use
Alesis Power cord #7-41-0004.
• For 220 VAC 50 Hz operation in Europe and
Scandinavia, use Alesis EU power cord #7-41-
0002.
• For 240 VAC 50 Hz operation in Australia, use
Alesis AS power cord #7-41-0003.
Do you hear an AC hum in your system?
For detailed tips on how to get rid of "ground
loops" that cause hum, see page 92.