Rockwell Automation SA500 AC Power Modules - Manual (Page 13)

Power Module Mechanical Description 2-1
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Power Module Mechanical Description
Power Modules of all four ratings are the same size, consisting of a sheet metal
enclosure, cooling fans, heatsink, a power supply PC board, inverter power devices,
and the PMI Regulator PC board. A DC-to-DC converter supplies power to the PMI
and to Hall-effect devices used for current feedback.
The faceplate of the Power Module has 15 LEDs, two rail I/O ports, fiber-optic transmit
and receive ports, a resolver feedback connector for speed feedback and analog input
signals, and a drive I/O connector for dedicated and general-purpose drive I/O. A
push-button labeled “RE-BOOT” allows the PMI Regulator to be reinitialized. This
allows ne Power Module to be reset without powering down the entire DC bus and all
the Power Modules on it. When the button is pressed, all I/O is reset, the PMI executes
its power-up routine, and then requests its operating system from the UDC module.
The SA500 Power Module is cooled by forced air. Air enters through the bottom of the
module and exits through the top. The two fans at the bottom of the Power Module are
internally connected and powered via a 24V supply produced by the DC-to-DC
converter. The PMI monitors the temperature of the Power Module heatsink and
reports an overtemperature condition in register 202/1202, bit 0.
Two quarter-turn fasteners on the faceplate allow removal of the Power Module cover.
Mounting holes are provided on flanges that extend above and below the module.
Module dimensions are listed in Appendix A. See figure 2.1 for views of the module
with and without its cover.
Note that motor-mounted resolvers are required for speed and position feedback on
SA500 drives. Resolvers are included with every SA500 brushless and induction
motor.