Rockwell Automation SA3100 Power Module Interface (PMI) Regulator - Manual (Page 71)

Circuit Board Replacement Guidelines 7-3
7.1 Replacing the PMI Regulator Assembly
Perform the following steps to replace the PMI Regulator assembly:
Step 1. Disconnect all connector cables from the PMI Regulator motherboard and
the Resolver & Drive I/O board. Use care when removing connectors to
avoid bending the connector pins. Refer to figure 1.1, 2.1, or 3.1 for the
locations of these connectors:
a. Resolver Feedback cable and Drive I/O cable on the Resolver & Drive I/O
board.
b. 50-pin PMI interface connector
c. NTC thermistor cable
d. Fiber-optic port connectors
e. Flex I/O connector (if used)
f. Meter port connector (if used)
g. PMI Regulator ground wire
Step 2. Remove the seven (7) M4 x 8 mounting screws that fasten the PMI Regulator
to its mounting plate.
Step 3. Lift the motherboard up and off the four key pins.
Step 4. To install the new PMI Regulator, align the four key holes on the
motherboard with the four key pins on the mounting plate and slide the
motherboard into position over the pins. Fasten the PMI Regulator to the
mounting plate with the seven (7) M4 x 8 mounting screws.
Step 5. Attach the connectors removed in step 1 to the new PMI Regulator. Use
care when connecting to avoid bending the connector pins.
Note that the PMI operating system will not download to the PMI Regulator if the
circuit boards are not properly installed.
7.2 Replacing the Resolver & Drive I/O Board
Perform the following steps to replace the Resolver & Drive I/O board:
Step 1. Disconnect the Resolver Feedback cable and Drive I/O cable from the
Resolver & Drive I/O board. Refer to figure 1.1 or 3.1 for the locations of
these connectors:
Step 2. Remove the four (4) M3 x 6 mounting screws and insulator from the
standoffs used to mount the Resolver & Drive I/O board to the motherboard.
Step 3. Slide the Resolver & Drive I/O board out from the backplane connector
board. Support the connector board while disconnecting the Resolver &
Drive I/O board and take care to avoid bending the connector pins.
Step 4. To install the new Resolver & Drive I/O board, reverse the previous three
steps.