QSC BASIS 904zz Hardware Manual page 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 904zz. 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 differ-
ent type of IEC power cord is required than the one supplied with
your 904zz, 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
receptacle with the lock-tab oriented toward the bottom of the
BASIS 904zz 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 904zz 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 connec-
tors. They can accept contact closure devices (switch, relay con-
tacts), 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 ener-
gized, 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 connection is closed.
14
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.
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.