Rockwell Automation SA3100 Power Module Interface (PMI) Regulator - Manual (Page 11)

Introduction 1-1
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Introduction
Rockwell SA3100 AC drives operate under the control of the AutoMax™ Distributed
Power System (DPS).
DPS is a programmable microprocessor-based control system that provides real-time
control of AC and DC drives. Each Universal Drive Controller (UDC) module in the
AutoMax rack is used to control one or two drives. Both AC and DC drives can be
controlled from one UDC module. The UDC module communicates over a fiber-optic
link with the drive’s Power Module Interface (PMI) Regulator. The control type (i.e.,
current for DC, vector with constant power or volts/hertz for AC) is determined by the
operating system contained in the PMI.
On an SA3100 drive the PMI Regulator is mounted inside the Power Module. The
PMI Regulator contains both the drive’s regulator circuitry and its communication
interface. The SA3100 PMI Regulator (figure 1.1) consists of a large motherboard
and a smaller Resolver & Drive I/O board that mounts on top of the motherboard. The
motherboard contains the PMI processor, AC power technology circuitry, UDC
interface, metering ports, status LEDs, and Flex I/O interface.
The PMI Regulator performs the following functions:
• Communicates with the UDC module in the AutoMax rack
• Executes the selected control algorithm
• Processes the feedback signals
• Updates the drive I/O and Flex I/O points
• Accumulates diagnostic data for transmission to the UDC module
This manual provides a description of the PMI Regulator hardware and related I/O
modules. Regulator installation/replacement guidelines are also provided. Note that
this instruction manual does not describe specific applications of the standard
hardware and software.
The other instruction manuals in binder S-3053 describe the SA3100 power structure,
software, and communications. The user should be familiar with the manuals in
S-3053 before using the drive. Table 1.1 lists the document part numbers.