UD53 User Guide
Issue code: 53nu3
1 Introduction
1.1 Main features of the UD53
Applications The UD53 Resolver small option module is an interface module for
installation in a Unidrive. The UD53 operates with resolvers having the
following specifications:
Input impedance: >85Ω at 6kHz
Turns ratio (primary:secondary): 3:1 or 2:1
Excitation voltage: 6V
RMS or 4VRMS
The Drive must be operating in the Closed-loop Vector or Closed-loop
Servo mode; the resolver connected to the UD53 is used for speed and
position feedback.
Simulated
encoder
outputs
The simulated-encoder outputs produce quadrature AB signals
corresponding to the line counts from the source encoder. Alternatively,
these outputs can be configured for frequency and direction (F/D) signals.
In both cases, the outputs retain position infomation when direction is
changed.
By default, the resolver is used as the source for the simulated-encoder
outputs; alternatively, the main encoder (Encoder 1) connected to the
15-way D-type on the Drive can be used as the source.
The number of pulses per revolution can be scaled by factors of 2.
Installation
The UD53 must be fitted in the small option module bay of the Unidrive.
All connections to the Drive are made by a multi-way connector.
Connections from external equipment are made by a plug-in 16-way
screw-terminal block on the UD53.
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