Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set User Manual
Page 808
Section 15B
Replacement Procedures
15B-52
Under normal conditions the DC POWER indicator will be illuminated. If
a fuse is blown, the DC POWER indicator will not be illuminated.
One of the following conditions may have caused a blown fuse:
Excessive line voltage
Internal power supply malfunction.
To replace a blown fuse:
1.
Disconnect the cable running from the external power source to the
digital I/O.
ATTENTION: To guard against electrical shock hazards, never
make connections or disconnections at the AC distribution
network unless the main AC disconnect switch is open and
locked.
2.
Remove the fuse compartment cover.
3.
Remove the fuse holder; push the handle to the left, then pull
outward.
4.
Remove the fuse from its holder and replace it with a recommended
replacement fuse.
ATTENTION: Use only replacement fuses of the type and
rating specified for the unit. Improper fuse selection may result
in equipment damage.
5.
Place the fuse holder back into its compartment. Push inward until it
locks into place.
6.
Replace the fuse compartment cover.
7.
Restore power. The DC POWER indicator should now be
illuminated.
15B.34
Replacing the Power Fuse
on Digital I/O and Analog I/O