Posital Fraba IXARC Magnetic Rotary Encorders


Posital Fraba IXARC Magnetic Rotary Encorders determine angular position using magnetic field sensor technology. A permanent magnet α fixed to the encoder’s shaft creates a magnetic field which is sampled by a sensor β that generates an accurate absolute position reading.

Signal Processing is the Key to High Performance

The technological leap that pushes POSITAL’s IXARC magnetic encoders to the performance level of optical systems is based on a new generation of sensor systems. The combination of a custom Hall-effect sensor and complex signal processing algorithms running on powerful 32-bit microprocessor results in a considerably improved resolution and accuracy, along with latency times of only a few microseconds.

Posital Fraba has also implemented an incremental interface and can now offer a complete range of encoder solutions.

Multiturn Innovation

POSITAL can also provide absolute multiturn measurements using a revolution counter system that uses an energy harvesting system based on the Wiegand effect. This system requires no gears or batteries. Eliminating batteries brings about many advantages. Batteries have a limited lifespan, weigh a lot, and often contain harmful substances. Gear units have disadvantages of their own being large, complex, costly and vulnerable to shock and vibration.

Regardless of the rotational speed, even at near-zero, the energy harvesting system generates short, powerful voltage pulses, sufficient to power the counting electronics. The result is a revolution counter that is independent of any external power supply. This technology, which has proven itself since 2005, enables maintenance-free reliable measurement of absolute positions, even in demanding environments, for years to come.

Advantages of Magnetic Encoders

  • Robust and Durable
  • Mechanically Simple and Economical − No Battery, No Gear
  • Compact Design for Installation in Small Spaces



Technology Magnetic
Accuracy (INL) ±0.0878° (≤ 12 bit)
Duty Cycle 180° ± 27° (Speed > 100RPM)
Phase Angle 90° ± 14° (Speed > 100RPM)


Interface Programmable Incremental
Programming Functions PPR (1-16384), Output, Counting Direction
Configuration Tool UBIFAST Configuration Tool (Version ≥ 1.6.3)


Output Driver Push-Pull (HTL)
Output Voltage High Level Push-Pull (HTL) > 4 V @ 4.75-9 V Supply Voltage
> V-3 V @ 9-30 V Supply Voltage
Output Voltage Low Level Push-Pull (HTL) < 0.5 V
Output Voltage High Level RS422 (TTL) > 4 V
Output Voltage Low Level RS422 (TTL) < 0.5 V
Maximum Frequency Response 1 MHz
Maximum Switching Current 50 mA per Channel

Electrical Data

Supply Voltage 4.75 – 30 VDC
Current Consumption ≤140mA @ 5V DC, ≤70mA @ 10V DC, ≤40mA @ 24V DC
Power Consumption ≤ 1.0 W
Start-Up Time < 1 s
Min. Load Resistance 120 Ω
Reverse Polarity Protection Yes
Short Circuit Protection Yes
EMC: Emitted Interference DIN EN 61000-6-4
EMC: Noise Immunity DIN EN 61000-6-2
MTTF 280 years @ 40 °C

Environmental Specifications

Protection Class (Shaft) IP65
Protection Class (Housing) IP65
Operating Temperature -30 °C fixed (-22 °F), -5 °C flexible (+23 °F) – +70 °C (+158 °F)
Humidity 98% RH, no condensation

Download Datasheet: Posital Fraba UCD-IPH00-XXXXX-ATS0-CAW