Chapter 2
Configuring and Installing the SCXI Chassis
2-14
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Replacing the Power Entry Module Fuse
Caution
Disconnect all power before removing the cover.
Complete the following steps to replace the power entry module fuse:
1.
Power off the chassis.
2.
Remove the power cord from the power entry module.
3.
Using a flathead screwdriver, pry the door to the voltage selection
tumbler open from the top.
4.
Pull out the fuse drawer.
5.
Remove the fuse.
6.
Install the new fuse in the drawer.
7.
Reinsert the fuse drawer in the right-hand slot with the arrow pointing
to the right.
8.
Close the door.
9.
Reinsert the power cord.
Replacing and Checking Backplane Fuses on the
SCXI-1000 and SCXI-1001
In addition to the power entry module fuse, the analog supply lines on the
backplane are fused at 1.5 A on the SCXI-1000 chassis and at 4 A on the
SCXI-1001 chassis.
If you are making your own modules, fuse the module at 250 mA to avoid
blowing the backplane fuses. Fusing the module better protects the module
when a failure results in a large amount of current drawn by not allowing
the current to blow the backplane fuses.
On the SCXI-1000, the backplane fuses are located behind the fan. On the
SCXI-1001, the backplane fuses are located behind the right-hand fan, near
the power entry module, as viewed from the rear of the chassis.
Complete the following steps to check or replace fuses:
1.
Remove the appropriate fan and filter from the rear of the chassis by
following the instructions in the
section
.
Make sure to switch the power off and remove the power cord.
