Contactless sensor holds position in non-volatile memory

Contelec Vert-X 37MT
Rotational position of shafts can be measured and stored without fear of loss using Hall Effect encoder from Variohm Eurosensor. Contelec’s recently announced Vert-X 37MT Hall Effect encoder combining a 16-bit single-tu angle resolution with 16-bit multi-tu count (65536 tus) for unconstrained position feedback is now available from Variohm EuroSensor. Unlike conventional single-tu + multi-tu designs, the Swiss sensor specialist has employed a novel magnetic field measurement technique where no gearing is used or battery required – with the number of tus counted and saved in non-volatile memory that is powered by stored energy from shaft rotation. In this way absolute position is not lost during power down and is immediately available on power-up. The 24V DC CANopen interfaced encoder’s impressive specifications include independent linearity of +/- 0.1% (360°) with hysteresis to 0.1º and maximum repeatability to 0.1º. The Vert-X 37MT’s speed capability of 3000 rpm speed capability suits servo motor feedback, and with 360 million minimum movements specified, long life is assured. Aimed at heavy duty applications such as construction machinery or agricultural equipment, the highly durable IP68 sealed design includes duplex bearings and all stainless steel exteal hardware to provide maximum resilience to adverse environmental conditions. Its industry standard DS-406 CANopen device profile, contactless design, and high axial & radial load capability all contribute to straightforward installation, long working life and high-reliability position sensing. The encoder’s nominal housing dimensions are 55mm long x 36.5 mm diameter.  The standard version includes a size 13 servo mount with a 10 mm diameter slotted and flattened D-shaft and M12-m connector interfacing. Alteative multi-tu options are 2, 8 or 12 tus, or custom configured for the application.

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