Chapter 1
Using the Mainframe
© National Instruments Corporation
1-7
If you want to disable the front panel switch completely, you can remove
R93 (a surface mount, 0 Ohm resistor) on the back of the backplane PCA.
Figure 1-4 shows the location of this resistor. Once R93 is removed, the
only way to control power is through a switch connected to pins 5 and 18
of the 25-pin D connector on the rear panel of the mainframe. To access the
interface board, remove the power supply.
Figure 1-4. Location of R93 Surface Mount Resistor
PC Backplane Assembly
Located Under
the Connector
R93