Orbis™ absolute rotary encoder

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Orbis™ absolute rotary encoder

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OrbisTM is an absolute, through-hole rotary encoder suitable for applications where a typical OnAxis encoder cannot be mounted at the end of the rotating shaft due to space constraints.

 

The encoder comprises a diametrically magnetized permanent magnet ring and a printed circuit board. Geometric arrangement of 8 RLS’ proprietary Hall sensors on a PCB enables generation of one period of sine and cosine signals per mechanical magnet revolution. Moreover, it also enables cancellation of third harmonic component that becomes non-negligible at low magnet ride height.

 

An adaptive filtering function ensures high resolution at low rotation speeds and low angle phase delay at high rotation speeds. OrbisTM also features an additional built-in self-calibration algorithm that improves encoder’s accuracy after installation.

 

OrbisTM through-hole measuring principle allows customisation, with various board and magnet sizes to suit your application.

All output types
Reading type Axial reading
Resolution 14 bit
Maximum speed 10,000 rpm
Accuracy ±0.25° 
Accuracy thermal drift ±0.01° / °C
Repeatability ±2 LSB (counts, unidirectional)
Digital hysteresis ±2 LSB (counts)
Position update rate 50 kHz

 

All output types
Supply voltage 4.5 V to 5.5 V (at the connector) 
Set-up time 100 ms (worst case: 200 ms)
Current consumption 65 mA typical (no output load)

Connection

Molex 501568-1107 or soldering pads (through holes)
Output load   PWM, SPI  Max. ±5 mA at 3.3 V
  RS422 Max. ±100 mA at 5 V
ESD protection HBM, max. ±2 kV 
All output types
Magnet material Neodymium with Ni-Cu-Ni protective layer 
Actuator material Anodised aluminium
Mass

Readhead: 5.3 g
Magnetic actuators (ID): 6 mm: 6.0 g ; 8 mm: 5.5 g ; 10 mm: 5.7 g ; 12 mm: 8.7 g ; 15 mm: 7.1 g
Magnets (ID): 12 mm: 3.8 g ; 16 mm: 6.4 g

All output types
Temperature 
Operating: 0 °C to +85 °C
Storage: -40 °C to +105 °C 
Not valid for cables with DSUB-9 connector.
Humidity 0 % to 70 % non-condensing
External magnetic field Max. ±3 mT (DC or AC) on top side of readhead

Features

  • True absolute encoder
  • 14 bit resolution
  • 8 proprietary Hall sensor ASICs
  • Through-hole design enables its mounting anywhere along the shaft 
  • Self-calibration after assembly
  • No magnetic hysteresis
  • Built-in self-diagnostics
  • Status LED
  • SPI, SSI, BiSS-C, PWM, and asynchronous serial communication

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Lead time up to: 14 working days