Peavey MediaMatrix X-Frame 88 Manual page 28

Control Voltage (CV) Input Ports
There are 4 CV (control voltage) inputs on the X-Frame™ 88. Each is identical in function and wiring, and each is represented
individually within the X-Ware software. These ports are 3-wire ports referenced to an internal ground. These connections are
often the source of confusion to system designers, so please take note at the following information.
Refer to Fig. X, External Control Connections. The figure shows two rows of twelve 3-wire connectors and their associated
nomenclature. Among the four CV ports, there are two Fault Contact ports, which we will discuss later. Each CV port is iden-
tified by a "V", indicating a "Voltage" port. V1 is port 1, V2 is port 2, and so on. Each CV port has three pins labelled 10V,
Ground and V (1-4). Refer to the illustration below for an explanation of these pins. (Shown for port VI, typical of each port.)
10V Pin: Each 10V pin is wired to
the same internal 10V DC voltage
source. Each port is capable of sup-
plying 7mA of current. This pin is
referenced to ground.
ls
What is very important to understand about the CV input port, is that this is NOT a dry contact configuration. In other
words, this is not the type of port that works from a change from an N.O. or N.C. state. With the CV ports on the X-Frame 88,
the fundamental operation is the return of a DC voltage to the port's V pin. The X-Frame 88 provides this voltage for you on
every "10V" pin, allowing you to interconnect many different types of analog controls between the pins as active controls.
The action of the corresponding software device within the X-Ware software is dependent on a return voltage on the V pin.
The voltage that gets returned to the V pin is scaled between 0 and 10V DC. This scale is translated within the software device
to 0-256.
It is not necessary in most cases to bring out the ground conductor when using common external controls. Because the control
function only requires a voltage return, the ground is usually not required. The following examples illustrate the most common
use for the CV ports and how to wire them.
Page 32
Ground Pin: Each ground pin is
wired to the X-Frame 88's internal
ground. This ground is a common
reference to the DC voltage sup-
10V V1 10V V2
NO COM NC
10V V3 10V V4
NO COM NC
FAULT
CV INPUTS CV INPUTS
CONTACT
http://mediamatrix.peavey.com copyright 2001 All Rights Reserved
X-Frame
plied at the 10V pin.
V pin: Unique to each port, the V
pin functions as a "return" for the
DC voltage output at the 10V pin.
This DC voltage must be returned
to the V pin for control operation.
SH
SH
RS-485
88 Designer's Manual
™