Request Quote
The sine-wave encoder S21, developed specifically for motor feedback applications, is well known for its broad temperature range from -15ºC to +120ºC, which enables the motor to be used to capacity more effectively. Thanks to the broad bandwidth of 500 KHz at full signal quality, peak speeds can be achieved, while excellent immunity to interference and high functional dependability through signal control and system monitoring ensure reliable operation.
Unit of Measure

Technical Specs

Brands

 N/A
Hengstler

Model

 N/A S21

Type

 N/A Encoders

Certification

 N/A

Mechanical

Housing Diameter

 N/A 53 mm

Shaft Diameter

 N/A Cone 1/10

Protection Class Shaft Input (EN 60529)

 N/A Ingress Protection (IP40)

Protection Class Housing (EN 60529)

 N/A Ingress Protection (IP40)

Axial Shaft Load

 N/A 20 N

Radial Shaft Load

 N/A 90 N

Note for Shaft Load Axial/Radial

 N/A For tapered solid shaft

Axial Endplay of Mounting Shaft (±) (Hub Shaft)

 N/A 0.5 mm

Radial Runout of Mating Shaft (±) (Hub Shaft)

 N/A 0.1 mm

Maximum Speed (Continuous)

 N/A 12,000 rpm

Maximum Speed (Short Term)

 N/A 15,000 rpm

Torque

 N/A ≤ 1 N·cm

Applications

N/A Motors, printing machines, lifts

Features

N/A

  • Wide operating temperature range of -15 ºC up to +120 ºC, therefore optimum use of motor capacity
  • High limiting frequency with excellent signal quality, allowing highest peak speeds and reduced non-productive time wastage
  • Excellent immunity to interference (EN 61000-4-4, Class 4)
  • High functional safety due to signal control and system monitoring (under-voltage, pollution, disc damage, end of LED service life)
  • High signal quality through control and error compensation

Additional Information

N/A The incremental signals A and B and the zero signal R are differential voltage signals. The differential signal level is 1 Vpp. The zero signal appears once per revolution and reaches its maximum value at the angle where the amplitudes of A and B Signals are equal. The coarse tracks C and D deliver one sinewave period per revolution and are utilized to determine the absolute rotor position of Brushless DC motors for startup commutation. All signals have a DC offset of 2.5 V.

The quality of the servo loop is determined to a large extent by the absence of harmonics in the encoder's sinewave signals, particularly at low speed. In order to achieve high interpolation factors in the sequencing control, the incremental sinewave signals A and B are available with a harmonic distortion significantly under 1% throughout the specified temperature range. This delivers excellent synchronism and a high level of positional accuracy with servo axes.