Power Supply Voltages At Power Monitoring Connector (Db-9) - National Instruments PXI-1000 User Manual

Chapter 2 Installation and Configuration
When connecting digital voltmeter probes to the rear D-sub connector, be careful
Caution
!
not to short the probe leads together. Doing so could damage the power supply.
Note Use the rear panel D-sub connector to check voltages only. Do not use the
connector to supply power to external devices.
Note If the fans or power unit fail to function properly, refer to the
PXI-1000
PXI-1000 User Manual
You can use a digital voltmeter to ensure all voltage levels in your
PXI-1000 are within the allowable limits. Referring to Table 2-1, connect
one lead of the voltmeter to a supply pin on the remote power monitoring
connector (9-pin D-sub) located on the rear panel. Refer to Table 2-2 for a
pinout diagram of the remote power monitoring connector. Connect the
reference lead of the voltmeter to one of the ground pins. Compare each
voltage reading to the values listed in Table 2-1.
Table 2-1. Power Supply Voltages at Power Monitoring Connector (DB-9)
Pin Supply
2 +5 V
4 +3.3 V
6 +12 V
8 –12 V
1, 9 Logic Ground
If the voltages fall within the specified ranges, the mainframe complies
with the CompactPCI voltage limit specifications. Note that the rear panel
D-sub connector is to be used to check voltages only. Do not use these
voltages to supply power to external devices.
section of Chapter 3, Maintenance.
Acceptable Voltage Range
2-4
4.75 to 5.25 V
3.135 to 3.465 V
11.4 to 12.6 V
–12.6 to –11.4 V
N/A
Troubleshooting the
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