user manual

9
Connections
AC Power Cord
Insert the molded receptacle of the AC power cord into the AC
power inlet on the back of the BASIS 722az. Plug the AC line
connector into the AC outlet. The power supply will accept from
100 to 240 Volts AC, 47 to 440 Hertz, without any changes. If a
different type of IEC power cord is required than supplied with
your 722az, contact QSC’s Technical Services Department.
QSControl
Connect one end of a category-5 cable terminated with an RJ45
plug into the QSControl receptacle. Insert the RJ45 plug into
the receptacle with the lock-tab oriented toward the bottom of
the BASIS 722az and push firmly until the connector locks into
place (usually an audible “click” can be heard). Connect the
other end to the appropriate QSControl.net network port.
Analog Audio Inputs
Eight balanced audio inputs are provided, CH 1 INPUT - CH 8
INPUT. Plug the input signal terminal block connectors into the
input receptacles. Connection pin-out is printed on the rear
label for reference. Refer to the illustrations for balanced and
unbalanced connections. Use balanced audio inputs whenever
possible.
Omni In
The six Omni In connectors are two-pin terminal block connec-
tors. They can accept contact closure devices (switch, relay
contacts), 10k ohm variable resistors, TTL logic level, and 0-5
VDC input.
The contact closure and logic devices accommodate on/off or
state-change events; the variable resistor input provides full 8-
bit resolution allowing for incremental-change events. Refer to
the illustrations for connection recommendations. NOTE! +48
volts is the absolute maximum that can be applied to the + pin
without damage. Voltage is with respect to chassis or the - pin.
Logic Out
The four Logic Out connectors are two-pin terminal block con-
nectors. They provide CMOS logic level compatible signals for
external devices.
Relay Out
Two sets of relay contacts are provided, RELAY OUT 1 and
RELAY OUT 2. Contacts are floating and rated for 30VDC, 1A.
There is one common terminal, one normally-closed contact ter-
minal and one normally-open contact terminal. These are
labeled as C, NC and NO on the rear panel. When the relay is
not energized, the C terminal is connected to the NC terminal
and the NO terminal is not connected; when the relay is ener-
gized the C to NC connection is opened and the C to NO connec-
tion is closed.
Analog audio input-
balanced connection.
Relay Out connections.
Refer to text, at left, for
explanation.
Logic Out connections.
Negative (-) terminal is
at chassis potential.
Positive (+) terminal
logic level is switched
using software.
QSControl connection.
Accepts ruggedized or
normal shell-less RJ45
plugs.
Omni In connections.
Variable input must be
10k ohm variable
resistor. Contact clo-
sure input can be a
switch or relay con-
tacts. These inputs
can operate software
“devices”. Negative (-
) terminal is at chassis
potential.
Analog audio input-
unbalanced connec-
tion. Note jumper
wire between - and
ground.