AC POWER SUPPLY MODULE REPLACEMENT PROCEDURE | PART NO.
24732
REV
B.0
4
MODEL ADH NEMA
AC POWER SUPPLY MODULE
REPLACEMENT PROCEDURE
Once the four nuts and lock washers securing the
mounting bracket to the front cover have been removed,
move the existing power module and mounting bracket
away from other components for greater clearance.
Note the configuration of the five electrical leads
connected to the existing AC power supply module.
Refer to Figure 3 and Table 1. These leads will connect to
the corresponding terminals on the new module. Using a
Philips screwdriver, carefully loosen the set screws
securing the electrical leads to the existing supply
module terminals, then carefully remove the leads from
the existing module. Also at this time, remove the
jumper cable from across terminals 3 and 5 on the top
side of the terminals.
7.
8.
Remove the two screws and lock washers connecting the
power supply module to the mounting bracket.
Refer to Figure 4.
Set aside the mounting bracket and attaching hardware
for re-use.
Using the two screws and lock washers removed in step
9, install the new power supply module to the mounting
bracket and torque to 8 in/lb.
Prior to installing the new power supply module and
mounting bracket, connect the electrical leads and
jumper to the new supply module as they were
connected to the original module. Refer back to Figure 3
and Table 1 on the previous page. Secure each lead and
the jumper across terminals 3 and 5 by placing each lead
behind the mounting screw from underneath then
tightening the mounting screw inside each terminal.
Gently tug on each lead to make sure it is fastened
securely.
Once the five electrical leads and jumper are installed to
the new supply module and the module itself is
connected to the mounting bracket, install the mounting
bracket over the Pem® studs on the inside of the front
cover as the original module had been. Using the nut
driver, install the four nuts and lock washers removed in
step 6 and torque to 10 in/lb.
Reinstall the front cover removed in step 4. If it was
placed upside down on the lid of the unit during this
procedure, carefully turn the cover back over and work it
back into position, past the wires and other components
in the enclosure. Reinstall the four corner screws
securing the front cover to the chassis.
Reconnect the ground wire by inserting it behind the
retaining screw from which it was removed, then tighten
the ground wire retaining screw. Reconnect the green
power connector by holding it in place then tightening
the two captive screws removed in step 3. Reconnect
both ends of the orange Ethernet cable removed in step
3. It does not matter which end of the Ethernet cable
goes into which receptacle.
With the ground wire, power connector and Ethernet
cable reconnected, close the lid of the NEMA enclosure
and secure the two latches opposite the hinges. Secure
the lid in place by reinstalling the two captive screws in
the two outer corners of the lid.
Restore machine power by plugging the unit back in.
9.
10.
11.
12.
13.
14.
15
16.
Figure 3. - AC POWER SUPPLY MODULE ELECTRICAL CONNECTIONS
Figure 4. - THE AC POWER SUPPLY MODULE MOUNTING BRACKET SECURING SCREWS.
Jumper connects across
terminals 3 and 5.
Insert Philips screwdriver into each access hole to loosen
set screws.
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