National Instruments sbRIO-9651, Руководство по конструкции, Страница: 33 / 76

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Chapter 1 Fixed Behavior Signals
Temp Alert
The sbRIO-9651 SOM provides a Temp Alert signal to indicate that the onboard CPU/FPGA
or Primary System temperature has exceeded the minimum or maximum temperature
specifications of the sbRIO-9651 SOM. Refer to the
Environmental
section of the
NI sbRIO-9651 System on Module OEM Device Specifications
for the minimum and maximum
temperature specifications.
Temp Alert Signal Definitions
Table 1-19 describes the Temp Alert pins and signals on the sbRIO-9651 SOM connector.
Temp Alert Implementation on the Reference Carrier
Board
Figure 1-10 shows a schematic design for the Temp Alert implementation on the reference
carrier board.
Figure 1-10. Temp Alert Reference Schematic
Refer to the
TEMP_ALERT
section of the
NI sbRIO-9651 System on Module OEM Device
Specifications
for more information about the behavior of the Temp Alert signal.
Refer to the
Validating Temperature Measurements
section of Chapter 4,
Mechanical
Considerations
, for information about validating the system temperatures of your sbRIO-9651
SOM application.
Table 1-19.
Temp Alert Signal Definitions
Signal Name
Dedicated
SOM Pin # Direction
*
I/O
Standard Description
TEMP_ALERT 46 O LVTTL Temp Alert indicator.
Asserted high.
* I/O direction is with respect to the sbRIO-9651 SOM.
TEMP_ALERT
1 1 2 2
D S 4
RED
LED-QTLP6 3 0
2
3 57 0.5%
1/16 W
R129