Rockwell Automation SA3100 AutoMax Distributed Power System - Manual (Page 28)

2-8 AutoMax Distributed Power System Overview
The Power Supply module provides the power necessary for the operation of the
modules in the PMI rack. Connections are provided for 115VAC single-phase input
power, a ground terminal, and 115VAC output terminals to power a rack fan, if
required. Power supply status is indicated by an LED on the faceplate.
The RISC-based PMI Processor controls all communication within the PMI rack. It
executes the inner control algorithm and provides feedback and diagnostic information
to the UDC module. The PMI Processor has two rail ports for connection to AutoMate
digital and analog rails, as well as four software-programmable meter ports. The
faceplate of the PMI Processor module also contains transmit and receive ports for
one channel of fiber-optic cable and five LEDs to reflect the status of the PMI rack and
the connected DC Power Module.
The Resolver & Drive I/O module provides 12- or 14-bit resolution of external resolver
signals to the PMI Processor, as well as connections for an analog input and drive I/O.
The module’s resolver-to-digital converter can be automatically tuned for wire length
and cable characteristics up to 150 meters (500 feet). The resolver feedback
connector on the faceplate is shared by an analog input. The analog input can be an
analog tachometer, which can be used as an alternate speed feedback device for DC
drives. The faceplate also provides a connector for drive I/O. Nine LEDs on the
faceplate indicate I/O and drive status.
The DC Power Technology module digitizes all armature and field signals related to
the DC Power Modules for use in the field and current regulation algorithms. Four
connectors are provided on the faceplate for monitoring feedback signals (e.g.,
armature current and voltage, AC line voltage) and for driving power devices. One
LED on the faceplate indicates the status of the gate driver circuits.
2.3.2 DC Power Modules
The DC Armature Power Modules include a full range of DCS S6 and S6R DC Power
Modules from 1 to 1000HP with higher horsepowers available by paralleling Power
Modules. These Power Modules provide continuous duty, adjustable-voltage armature
power to DC motors by SCR rectification of 3-phase power. Both non-regenerative
versions (S6) and regenerative versions (S6R) are available. Lower horsepower
versions (below 60HP) of these DC Power Modules are available as assemblies.
These assemblies contain integral PMI racks, armature SCR bridges, fans, fuses, field
SCR bridges (optional), etc.
The DC Field Power Modules allow tight regulation of field current and programmable
field economy, field weakening, and field loss protection. These Power Modules
provide continuous duty, adjustable voltage, current-regulated power to DC motor
fields by rectification of single-phase power. Both regenerative (S2R) and non-regenerative
(S2) versions are available.