Before you fix the sbRIO-9687 in the final position, ensure that the mounting plate is
grounded and that there is enough airflow around the board stack.
Note
Exercise caution when placing the sbRIO-9687 inside an enclosure.
Auxiliary cooling may be necessary to keep the device under the maximum ambient
temperature rating for the sbRIO-9687. Refer to the
sbRIO-9687 Specifications
for
more information about the maximum ambient temperature rating. For information
and examples regarding factors that can affect thermal performance, visit
ni.com/info
and enter the Info Code
sbriocooling
.
Before powering on the sbRIO-9687, make sure there are no wires or metal parts that could
touch the surface of the sbRIO-9687.
To power the sbRIO-9687, use a +24 V supply capable of delivering the current required by
the application. Inverter driver boards, the sbRIO-9607, and the GPIC are all powered through
the sbRIO-9607. The total power consumption should be considered when choosing an
external power supply. For information about sbRIO-9687 power consumption, refer to the
sbRIO-9687 Specifications
.
For information about connector type, see the
Connectors
on page 4 section. For details about
wiring, see
Power Input
on page 8.
System Power and Grounding Recommendations
NI recommends making the following connections to power and ground your system. For the
main sbRIO-9687 Power +24 VDC Power connection, make sure that the following
recommendations are incorporated into the design.
•
Connect the power supply to the sbRIO-9687 power connector with wires that can carry
the current for the sbRIO-9687 as well as all of the attached peripheral hardware.
•
If more power is needed for the inverters, consider disconnecting them from the
sbRIO-9687 power and supplying them directly with +24 V from a separate power
supply.
•
Connect the inverter power supply ground to the inverter driver board; do not connect it
to the sbRIO-9687 main power supply.
•
If separate power supplies are used for sensors, connect the sensor supply ground with the
sbRIO-9687 ground at the analog input connector.
•
Power the sbRIO-9687 before, or at the same time as, other power supplies in the system.
•
For lower earth connection impedance, add a low-gauge wire between one of the standoff
fixing screws and the chassis. The sbRIO-9687 is connected to earth ground through the
standoffs.
•
If shielded wires are used, ground them at the inverter connectors or at one of the standoff
fixing screws.
•
Electrically isolate the thermistors from earth ground and from other rails in the system.
sbRIO-9687 User Manual
|
© National Instruments
|
7
