Digital Audio Inputs - QSC BASIS 922dz Hardware Manual

Connections
AC Power Cord
Insert the molded receptacle of the AC power cord into the AC power inlet on the
back of the BASIS 922dz. 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 922dz, con-
tact QSC's Technical Services Department.
CobraNet
Connect one end of a category-5 cable terminated with a RJ45 plug into the
CobraNet receptacle. Insert the RJ45 plug into the receptacle with the lock-tab
oriented toward the bottom of the BASIS 922dz and push firmly until the connector
locks into place (usually an audible "click" can be heard). Connect the other end to
the appropriate CobraNet network port.
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 922dz 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.

Digital Audio Inputs

Four pair of AES/EBU inputs are provided through a DB-25 style connector. Connec-
tion pin-out is printed on the rear label for reference. AES/EBU sample rate must
be 48KHz and is internally synchronized.
Omni In
The six Omni In connectors are two-pin terminal block connectors. They accept
contact closure, TTL logic signals, 0-5 VDC control voltages, or 10k ohm variable
resistors. 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 recommenda-
tions. 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 connectors. They pro-
vide CMOS logic level compatible signals for external devices.
Relay Out
Two sets of relay contacts are provided, RELAY OUT 1 and RELAY OUT 2. Con-
tacts are floating and rated for 30VDC, 1A. There is one common terminal, one nor-
mally-closed contact terminal 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 energized the C to NC connection is opened and the C to NO con-
nection is closed.
14
CobraNet and
QSControl con-
nection. Accepts
ruggedized or
normal shell-less
RJ45 plugs.
AES/EBU digital input
connector and pinout.
Omni In connec-
tions. Variable
input must be 10k
ohm variable
resistor. Contact
closure input can
be a switch or
relay contacts.
These inputs can
operate software
"devices". Nega-
tive (-) terminal is
at chassis poten-
tial.
Logic Out connections.
Negative (-) terminal is
at chassis potential.
Positive (+) terminal
logic level is switched
using software.
Relay Out connec-
tions. Refer to text,
at left, for explana-
tion.