Owner`s manual

I N S T A L L A T I O N a nd P OWE R
page 1 – 7
RD-12 / March 99
Audio and Control Wiring
All audio and control I/O connections to the RD-12 console are made
through 12-pin AMP type connectors. The supplied 12-pin connectors use
crimp type pins. A crimp tool must be used, and an extraction tool is handy to
remove pins that have been inserted in the wrong connector block hole, or if
rewiring or wiring repair is needed in the future (see “Hand crimp tool wiring
instructions” on pages 1-8, 1-9). Always be careful to double check pin
numbering on the connector block and the wiring diagram before inserting the
pin in the block.
Connection Procedures
As supplied from the factory, the console requires no logic connections to
function. Therefore an orderly installation begins with the audio wiring. Note
that this manual is organized by module type (inputs, outputs, monitor
modules, etc.); each chapter contains detailed wiring instructions for its
module type. Proceed through the manual, chapter by chapter, until all modules
have been wired to suit your particular installation requirements. Once proper
audio operation is verified, go back to each individual chapter and proceed with
control wiring.
Insert Points
Certain module signals have insert patch points in their signal chains to
allow outboard audio processing. These include MONO MIC INPUTS
(MMD-5) and OUTPUT MODULES (OMD-5).
Normally these points are internally bridged at the factory (via PCB-
mounted programming switches) prior to shipment. If you intend to use
outboard signal loops at these points, you must reprogram these switches. See
pages 2-3 (mic inputs) and 4-3 (output modules) for details.
Unbalanced Connections (analog audio)
INPUTS — Wire to the console with typical shielded two conductor cable
(like Belden 9451), just as if you were connecting a balanced source. At the
unbalanced source machine’s output, connect the black wire (LOW) to the
shield. If the machine has a -10 dBu output, don’t hesitate to turn module input
gain as high as is needed.
OUTPUTS — RD consoles use a balanced output circuit which behaves
exactly like the secondary of a high-quality transformer, with no center tap—
this output is both balanced and floating. Either the HIGH or LOW side of the
output should be strapped to ground, with the output taken from the other side.
(Normally you’d strap LOW to ground, and take HIGH to feed your unbal-
anced equipment.)