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National Instruments Corporation
7
8-Slot PXI Backplane Installation Guide
Figure 5.
J1 Connector
Connector J21
Connector J21 may be used in conjunction with J20 for interfacing with an
inhibit switch, LED, and thermistor. It is not necessary to connect to J21 for
basic power-up of the backplane. Refer to Table 2 for the pin descriptions.
The mating connector for pins 1–6 of J21 is manufactured by Molex and
can be ordered with the part number 22-01-2067.
Table 2.
Connector J21 Pin Descriptions
Connector
Pin
Signal
Description
1
THERM2
Connects to pin 11 of J20
2
THERM1
Connects to pin 10 of J20
3
(No Pin)
—
4
NC
Not connected.
5
LED1
Connects to pin 6 of J20.
6
+5V
Connects to backplane’s +5V
power plane.
7
INH
Connects to pin 5 of J20.
8
LED2
Connects to pin 4 of J20.
9
GND
Connects to backplane’s ground
plane.
Ground
10 MHz
OUT
10 MHz
IN
2
1
3
4
5
6
7
8
