Gilderfluke&Co Sd-50 Audio & Show Controllers - Manual (Page 26)

To permanently prevent such accidental clock 'miss' settings after the ‘Atomic’ Clock is installed, you
can open the battery compartment and cut the wire which runs through it. This will disable the ‘snooze’ but-
ton, and thereby prevent it being hit accidentally in the future.
D) ! Card Cage Connection (Sd-50/0, Sd-50/8, Sd-50/40)
This female header connection is used to connect the power and secondary serial port to a Sd-50/CC-
10. It is not used for any other purpose.
E) ! Power Supply (Sd-50/0, Sd-50/8, Sd-50/40)
The power supply connections to the Sd-50/xx are available on both a 2.1 mm power jack and two of
the screw terminal positions. For mobile, permanent or higher current applications, you may wish to use the
screw terminals instead of the 2.1 mm power jack. It is less prone to being accidentally unplugged or vibrat-
ing loose. The screw terminals are also a very convenient place to ‘steal’ a little ‘juice’ to power the four
optically isolated inputs.
If you are not using the onboard amplifier, the Sd-50/xx can be run from any supply voltage from nine
vdc to twenty-four vdc. If you are using the onboard amplifier, the power supply should be between twelve
and twenty-four vdc. The amplifier will shut off at a hair below twelve vdc. If want to reach the maximum
possible power from the amplifier, you will need to run the Sd-50/xx from twenty-four vdc, and use 4Ω
speakers.
The Show Control outputs are powered from this supply connection as well. If you are driving twenty-
four vdc loads, then run the Sd-50/xx on twenty-four vdc. If your loads require twelve vdc, then run the Sd-
50/xx on twelve vdc.
The power supply connections are protected from reversed polarity. An idle Sd-50/xx draws only about
??? milliamperes. The onboard amplifier and loads which the Sd-50/xx is controlling will usually draw far
more current than the Sd-50/xx itself. If you are using the onboard amplifier at full volume, you should allow
at least 100 Watts for it, in addition to the current for controlling your animation loads (Sd-50/8 and Sd-50/
40). If you hear ‘clicks’ or clipping on your amplifier outputs, then your power supply capacity may need to
be increased.
F) ! DMX-512/MIDI/Net Serial In (Sd-50/8, Sd-50/40)
Two position Screw Terminals. This input can be selected for RS-422 (high-z) or optoisolated (low-z)
input by a switch on the bottom of the unit. DMX-512 in, Net Serial or IR Trigger Mode are normally
used with the ‘RS-422’ position, but will also work in the optoisolated (low-z) mode. MIDI in will only work in
the ‘optoisolated’ position.
DMX-512/MIDI Serial In connection has five possible modes of operation. These are selected through
the ‘Mp3 Config.exe’ program.
DMX-512 Input
The Optoisolated/RS-422 switch on the bottom of the Sd-50/8 or Sd-50/40 can be in either
position. In most cases, or if feeding multiple Sd-50/8 or Sd-50/40, then the ‘RS-422’ position
should be used.
The DMX-512 standard was developed by the United States Institute for Theatrical Technology
(USITT) for a high speed (250 KBaud) asynchronous serial data link. Although it was originally de-
signed for controlling light dimmers, it is now supported by hundreds of suppliers throughout the
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-50/xx Manual / October 29, 2012 2:29 PM / page 26 of 120