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Charlotte Stonestreet
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Miniature CANopen encoders
14 March 2017
Measurement and sensor technology specialist FSG has developed the MH609y-II-CAN series of miniature rotary encoders for installations where space is limited. Typical uses include measuring axes in joysticks, command units or driving switches in construction machinery, ships, rail vehicles or other mobile applications.

Despite a small diameter of 22.2mm and a case that is less than 39 mm long, the lightweight encoders (80 g) come with an integrated redundant Hall sensor for detecting 0-360° angles and a CAN-Bus interface.
Thanks to this dual measurement capability, the encoder is suitable even for safety-relevant applications. The sensor works with a resolution of 12 bit/360° and achieves a linearity of ±0.2% with a repeat accuracy of 0.1°. The CANopen protocol is used for signal output. The encoder is equipped with an 8-pole flat ribbon connection cable and can be installed via M10x0.75 central mounting.
Because the magnetic measuring principle of the Hall sensors requires no mechanical contact, the encoder has a lifespan of at least 300 million cycles. Notably, the miniature encoder is also extremely robust: it features IP65 ingress protection, a housing made of seawater-resistant aluminum and a strong 6mm shaft made from 1.4305 grade stainless steel.
It is suitable for environmental temperatures from -40 °C to +80 °C. It is highly resilient against mechanical impact, with shock and vibration resistance of 25g over 6ms and 4g for 5-100 Hz sine frequencies, respectively. The encoder supports input voltages of 18-36 VDC and draws some 50mA of current.