The
ProfiBus-DP Network Digital Resolver uses a resolver as the
encoding element. In this unit, the analog signal produced by a
brushless resolver is transformed to a digital format by a
built-in ratiometric tracking converter. This new concept and the
advanced technology of the Network Digital Resolver, with
electronic circuitry provides higher accuracy, increased
reliability, higher operating speeds, more flexible
counts-per-turn, and a smaller size than optical encoders.
No
Optics, MIL-Grade Resolver
There is no optically encoded disc or similar component used in
the Network Digital Resolver. A miniature MIL-Grade resolver
produces an analog position signal and high-grade electronics
molded in epoxy transforms this signal to digital format. The
resolver is a passive transducer, well known for its ruggedness
and performance in hostile industrial environments. The Network
Digital Resolver combines the ruggedness of a resolver with the
reliability of solid-state electronics and is designed to operate
reliably under severe environmental conditions, such as:
mechanical shock, vibration, temperature and humidity changes, oil
mist, coolants, and solvents. No broken discs! No disc
misalignments! No LED aging!
High
Resolution in a Small, Compact Housing
The single-turn Network Digital Resolver provides up to 12bit
Binary, Gray Code, or BCD in either a size 25 (2.5") dia. or
a size 40 (4.0") dia. housing.
Single-Turn
Operation
The Network Digital Resolver is an absolute encoder. That is, it
keeps track of the exact shaft position even during a power outage
or switching off the machine. At power-up, the Network Digital
Resolver will pick up the exact shaft position even if the machine
moved during the power outage. In a single-turn operation, the
machine cycle is completed during one complete revolution of the
transducer shaft.
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Field-Selectable
CW or CCW Operation
The Network Digital Resolver is factory-wired for ascending counts
with CCW shaft rotation. However, the direction of operation can
be easily selected in the field by opening up the case and simply
reversing the resolver-input plug. No wires need to be unsoldered
or soldered.
Ratiometric
Resolver-to-Digital Converter
The AVG Automation ratiometric-converter is practically immune to
electrical noise, voltage, frequency and temperature variations,
and can track speeds up to 5000 RPM.
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