Issue 6, September 2004
Model 50/51 User Guide
Page 16
Studio Technologies, Inc.
the female 5-pin DIN-type connectors
on the back of the Model 50 and 51,
and you’re done.
Note:
If you require a longer cable, be
certain to buy a MIDI cable that has all five
pins wired. If they aren’t all connected, the
Model 51 will not operate. This is because
the Model 50 powers the Model 51 with
the pins that aren’t used for MIDI data.
For best performance, the cable that
connects the Model 50 with the Model
51 should be limited to 50 feet (15.3m).
Should you need to exceed this length,
refer to the Technical Notes section
of this guide for details on the cable
requirements.
For more information on MIDI, and using
controllers other than the Model 51,
please refer to Appendix A.
Remote Control Inputs
The Model 51 allows the connection of
two external switches or contact closures.
Refer to the Advanced Installation Topics
section of this guide for details.
AC Mains Power
The Model 50 is internally configured to
operate from either 100, 120, or 220/240V,
50/60Hz. In most cases, units shipped
to North America are factory selected for
120V operation. Units bound for Japan are
selected for 100V, while our friends “down
under” and in Europe receive units set for
220/240V. Before connecting the Model
50 to mains power, check that it is con-
figured to match the local mains voltage.
Look on the back panel, adjacent to the
power entry connector, for the configured
voltage(s). Note than an incorrect configu-
ration could seriously damage the unit.
Should it be necessary to change
the unit’s operating voltage it must be
performed only at the factory or by
an authorized service technician.
The Model 50 uses an IEC standard
connector to mate with the AC mains
cord. The wire colors in the AC mains
cord should conform to the internationally
recognized CEE color code and must
be wired accordingly:
Connection Wire
Color
Neutral (N)
Light Blue
Line (L)
Brown
Protective Earth (E)
Green/Yellow
Safety Warning:
The Model 50 does
not contain an AC mains disconnect
switch. As such the mains cord plug
serves as the disconnection device.
Safety consideration requires that
the plug and associated outlet be
easily accessible to allow rapid discon-
nection of mains power should it prove
necessary.
As soon as mains power is applied, the
Model 50’s power present LED will light.
The Model 51 will go through its power-
up sequence lighting each LED in a rapid
sequence. The power present LEDs on
the talent amplifiers will also light.
The two Over Current LEDs located on
the front panel of the Model 50 should not
be lit. If either or both are flashing, imme-
diately refer to the Troubleshooting section
of this guide. If everything appears to be
functioning properly you are now ready to
configure the system.
