Page 33
MediaMatrix - A Division Of Peavey Electronics Corp.
Topic Section
CV Input Switch Interface
Equivalent DC Circuit
Supplied DC voltage at “10V” terminal
Voltage return at “V1” terminal
Side view of two-wire
connection soldered to
SPST rocker switch
In this illustration, we have a simple SPST panel-mount rocker switch connected to CV Port 1 on the rear panel of the X-Frame
88. The 10V pin Port V1 is wired to one side of the switch and carries the X-Frame 88’s DC voltage. The voltage is switched
and returned to the V1 pin 1 of Port 1 as the return voltage. This is the equivalent of shorting the 10V and V1 pins of the CV con-
nector. It is important to note that what is happening here is a switching of the DC voltage. The ground is not necessary for
the switching action, as it is internally referenced.
When making this type of connection, it is advisable to use a high quality 2-conductor cable. A shield is not necessary, but the
conductors should be at least 20AWG. Heavier wire should be used as cable runs exceed 100’.
Remember, unless a voltage is returned to the “IN” pin of the CV port, nothing will happen within the software.
Although good wiring practice would dictate that your voltage and return conductors are labeled in the field, in reality, this is
not necessary. Actually, it doesn’t matter which conductor you use for the return and voltage connections, since you can
inverse the connection in the software when you calibrate the controls. For more information on this topic, please refer to
pages 34-35 and the online help in both the MWare
™
3.1.2 and X-Frame
™
88 software.
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