© National Instruments
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2-9
Caution
When connecting digital voltmeter probes to the rear 9-pin D-SUB
(DB-9) connector, be careful not to short the probe leads together. Doing so could
damage the power supply.
You can use a digital voltmeter to ensure all voltage levels in the NI PXIe-1082DC chassis are
within the allowable limits. Referring to Table 2-2, connect one lead of the voltmeter to a supply
pin on the remote voltage monitoring connector (9-pin D-SUB) on the rear panel. Refer to
Table 2-1 for a pinout diagram of the remote voltage 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 2-2.
Note
Use the rear-panel 9-pin D-SUB connector to check voltages only. Do not use
the connector to supply power to external devices.
If the voltages fall within the specified ranges, the chassis complies with the CompactPCI
voltage-limit specifications.
8
-12 VDC
9
Logic Ground
Table 2-2.
Power Supply Voltages at Voltage Monitoring Connector (DB-9)
Pin
Supply
Acceptable Voltage Range
2
+5 V
4.75 to 5.25 V
4
+3.3 V
3.135 to 3.465 V
6
+12 V
11.4 to 12.6 V
8
-12 V
-12.6 to -11.4 V
1, 9
Logic Ground
0 V
Table 2-1.
Remote Inhibit and Voltage Monitoring Connector Pinout (Continued)
DB-9 Pin
Signal
1
2
3
4
5
6
9
7
8
