INSTALLATION and POWER
page 1 – 6
R-55e / July 2004
Note that each power supply is fitted with a 3-wire grounded AC
cord that should be plugged into a "clean" AC power source, that is, an
AC source that feeds only the control room audio gear. This source
should be a separate feed from those powering lighting, air-condition-
ing, or any other non-audio machinery. The third pin ground wire of the
AC source should be tied to the central system ground point.
Failsafe Dual Redundant Supply
Wheatstone failsafe power supply systems use two separate rack-
mount power supplies for each piece of powered equipment. Though
either is capable of running a full load on its own, in failsafe operation
both units run in tandem: if one fails, the other takes over, assuring
uninterrupted operation.
In order for failsafe systems to perform as designed, always have
BOTH rackmount supplies powered up and connected to their associ-
ated equipment.
Energizing
Assuming the R-55e console mainframe is properly placed and
grounded, and its SPS-100 power supply correctly rackmounted and
connected to the console, you may now energize the power supply by
plugging it into the AC mains. The console's VU meters will illuminate
and individual module switches will assume factory default settings.
Note: To de-energize the console, unplug the rackmount power
supply’s AC cord from the AC mains. Never de-energize the console
by disconnecting the cable that connects the console and power
supply together.
Once you have verified proper power-up, unplug the rackmount powerOnce you have verified proper power-up, unplug the rackmount power
Once you have verified proper power-up, unplug the rackmount powerOnce you have verified proper power-up, unplug the rackmount power
Once you have verified proper power-up, unplug the rackmount power
supply to de-energize the console. You may now proceed to wire upsupply to de-energize the console. You may now proceed to wire up
supply to de-energize the console. You may now proceed to wire upsupply to de-energize the console. You may now proceed to wire up
supply to de-energize the console. You may now proceed to wire up
audio and control connections.audio and control connections.
audio and control connections.audio and control connections.
audio and control connections.
The power feed recom-
mended in the text is of-
ten installed and referred
to in studios as an “iso-
lated AC ground” outlet.
It is usually orange in
color.
R-55e / Apr 2008
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