Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 778)

Section 15B
Replacement Procedures
15B-22
To replace main power supply:
1. Turn OFF all power to the control.
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. Disconnect all cables that are connected to the main power supply
module. Label all cables to simplify installation of the new main
power supply module.
3. Remove the 4 mounting screws shown in Figure 15B.5 that hold the
main power supply module to the component enclosure.
Figure 15B.5
Locating the Screws on the Main Power Supply
AC POWER 250 V
5.0 A
H
L
H
L
AC
IN
PE
AUX
AC
ON
SW
COM
OFF
SW
4. Replace the main power supply module with a new one.
5. Replace and tighten the 4 mounting screws then reconnect all cables
that were disconnected.
15B.7
Replacing the Main Power
Supply on the 9/260 and
9/290