14
Connections
AC Power Cord
Insert the molded receptacle of the AC power cord into the AC
power inlet on the back of the BASIS 902zz. Plug the AC line con-
nector 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 the one supplied with your
902zz, contact 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 recep-
tacle with the lock-tab oriented toward the bottom of the BASIS
902zz 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 902zz 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.
Omni In
The
six
Omni In
connectors are two-pin terminal block connectors.
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 connec-
tors. 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 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
termi-
nal is connected to the
NC
terminal and the
NO
terminal is not con-
nected; when the relay is energized the
C
to
NC
connection is
opened and the
C
to
NO
connection is closed.
Relay Out connec-
tions. Refer to text,
at left, for expla-
nation.
Logic Out connec-
tions. Negative (-)
terminal is at
chassis potential.
Positive (+) termi-
nal logic level is
switched using
software.
CobraNet and
QSControl con-
nection. Accepts
ruggedized or
normal shell-less
RJ45 plugs.
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.
