8821 Angolo di rotazione incrementale / sensore di velocità rotativo

Robusto, preciso, elettricamente affidabile, resistente, elevata resistenza alle interferenze, grado di protezione IP65, a 360°, rilevamento della direzione di rotazione

  • Features

    Sensore di velocità rotativo / Sensore di spostamento angolare

    • Tensione di alimentazione 10 ... 30 V DC
    • Grado di protezione IP65, a 360°
    • Robusto
    • Elevata resistenza alle interferenze

    Sensore di velocità rotativo

    • 60 impulsi/giro(standard)
    • Massimo 8000 rpm

    Sensore di spostamento angolare

    • Fino a  3600 impulsi/giro
    • Rilevazione della direzione di rotazione (canali A e B)
    • Impulso di riferimento (canale N)

    Versioni speciali su richiesta
    (Frequenze più elevate, uscita TTL, etc.)

  • Product data

    Model 8821
    Principle Incremental
    Measuring range Rotary speed sensor: 60 pulses/turn (standard)
    Angular displacement sensor: up to 3600 pulses/turn
    Signal output H > 2.5V - L < 2.5V
    Protection class IP65
    Range of operating temperature -10 ... +70 °C
    Supply voltage 10 … 30 V DC
    Electrical connection PG screwing with screened PVC cable
    Continuous rotation possible Ja
    Displacement speed 8000 U/min
    Specific characteristics
    • Degree of protection IP65, all-around
    • Robust
    • High resistance to interference
    • Rotary speed sensor: 60 pulses/turn (standard)
    • Angular displacement sensor: up to 3600 pulses/turn
    • Detection of rotation direction (channels A and B)
    • Reference pulse (channel N)
    • Special versions on request (higher pulse rate, TTL output etc.)
  • Description

    Incremental rotation sensors are used wherever displacement, positions or speeds have to be measured accurately.

    They are therefore important interfaces between the mechanical and electronic parts of a machine.

    Mechanically robust, electrically reliable and resistant to extreme ambient conditions; these are the outstanding properties offered by this sensor.


    Typical applications include:

    • Machine tools
    • Wood and plastic machining
    • Textile machines
    • Lifts
    • Door systems
    • Paper machines
    • Drive equipment
    • Assembly and handling equipment
    • Packaging machines
    • Scales
    • Test machines
    • Conveying equipment
    • Doors and gates

    Description Rotary speed sensor

    Model 8821 rotation sensor generates rectangular electrical pulses when the shaft is turned. An encoder disk is coupled to the shaft which is carried on 2 ball bearings. The light from an infrared diode passes through the encoder disk and the diaphragm disk (which is only present on the angle sensors).

    The signals picked up by light-sensitive sensors are processed to yield rectangular signals.

    The aperture disk generates an offset in the pulse sequences (only on angle sensors).

    Description Angular displacement sensor

    The rectangular pulses are output from channels A and B with a displacement of a quarter of a pulse (90°). This displacement allows the evaluation electronics to detect the direction of rotation. Electrical faults and vibrations do not lead to incorrect counts.An early warning output indicates that the light intensity is weakening. After this, the sensor can still be operated for some thousands of hours before it fails.A reference pulse, N, is also output. This is a single pulse for each rotation.

  • Data Sheet & Downloads

    Data sheet



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