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CV Input Switch Interface
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.
10V
POWER
OFF
10V
CV INPUTS CV INPUTS
Supplied DC voltage at "10V" terminal
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
MediaMatrix - A Division Of Peavey Electronics Corp.
V1
10V
V2
NO COM NC
V3 10V
V4
NO COM NC
FAULT
CONTACT
Voltage return at "V1" terminal
SH
ARCHITECTURAL
ACOUSTICS
SH
RS-485
Side view of two-wire
connection soldered to
SPST rocker switch
Equivalent DC Circuit
3.1.2 and X-Frame
88 software.
™
™
TX A
PC PORT
RS-232
RX A
PEAVEY ELECTRONICS CORP.
MERIDIAN, MS MADE IN U.S.A.
I/O EXPANSION
Page 33
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