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Heavy-duty incremental rotary encoder

14 June 2015

The new ENI11HD heavy-duty incremental rotary encoder from Pepperl+Fuchs provides reliable speed feedback for large induction motors and is unaffected by the damaging bearing currents caused by induced voltages on the motor shaft.

The ENI11HD offers exceptional resistance to temperature extremes (-40°C to 80°C), constant vibration up to 10g at 2,000Hz and powerful shocks up to 200g at 6m/s. It has ingress protection to IP69K and electromagnetic interference immunity to EN 61000-6-2:2005.

In addition, the device is unaffected by the electrical currents generated by the constant rotation of the motor shaft. These currents can be strong enough to degrade and ultimately cause the failure of the bearings in motors and conventional rotary encoders.

The ENI11HD is currently protected up to 350V; however, a version with increased protection is due for release in 4Q 2015, offering protection from shaft voltages up to 2.8kV.

Available as hollow shaft (up to 28mm diameter) or blind hollow shaft (up to 20mm diameter) versions and with a terminal box that can be rotated 360°, the housing construction offers users ease and flexibility during design, installation and maintenance.

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