Rotary encoder ETx25K

Kit encoder ETx25K

Kit encoder with flange mounting in compact design (housing depth 8 mm) as single or multi-turn variants and many electronics options

  • Single or programmable single-/multiturn encoder
  • Digital signal processing
  • Analogue, incremental or SER, SPI interface
  • Very low housing depth (8 mm)
  • Developed and manufactured in Germany
VDCmAPWM signalincrementalSerial SPI/SER
Resolution Incremental ≥ 1000 ppr., Absolute 12 bit, Absolute 14 bit
Functions / Features Without mech. stop, Kit-Encoder, Customer-programmable
Output signal Analogue, Serial, Incremental, PWM, SER, SPI
Protection class Up to IP67
Sensor technology Hall Effect Encoder
Housing diameter 25 mm
Mounting Flange
Electrical connection Axial, Strands, Cable
Effective electrical angle of rotation 0...10° up to 0...72000°
Housing depth 8 mm
Product description: Kit encoder ETx25K

ETx25K kit encoders use the application's shaft for reliable angle measurement: as a single-turn (360°) with analogue, PWM, incremental, SER or SPI output or as a multi-turn version (up to 72,000°) with analogue output.

The ETx25K encoders are part of the ETx25 family. Common to these encoders is non-contact angle measurement, high reliability, long lifespan and independent linearity of up to ±0.3% for single-turn and ±0.05% @3600° for multi-turn variants. The latter can be programmed by the customer on site.

The compact ETx25K flange housing (Ø25 mm with only 8 mm housing depth) in protection class IP67 is fixed in the application with two M3 screws (not included in delivery). The magnet (included in the scope of delivery) is positioned in the application opposite the face of the ETx25K housing. There is no mechanical connection between the magnet and the encoder housing, so the encoder can be positioned decoupled from vibrations and thermals. A circular groove for an optional O-ring is provided on the face of the ETx25K enclosure. It is used to protect against the ingress of liquid and dust into the customer's unit. The O-ring (supplied with option D) is inserted between the mounting plate and the encoder for this purpose. Electrical connection options such as round or ribbon cable complete the profile. The following electronics are available:

ETA25K Analogue singleturn absolute encoder (redundant version ETA25KX):
Supplies an absolute analogue signal with 12-bit resolution. For safety-critical applications, galvanically isolated and redundant electronics are available (see ETA25KX series in the data sheet).

ETA25KPM programmable analogue multiturn or singleturn absolute encoder:
Programmable encoder for rotation angles up to 72000° (200 revolutions), can also be used as a programmable singleturn encoder. Resolution 12 bit, with current or voltage output. Signal can be programmed on site.

ETI25K incremental singleturn encoder:
With up to 1024 ppr and TTL, push-pull or open collector output signals

ETS25K serial singleturn encoder:
Digital signals in 12 bit resolution with SER interface and in 14 bit resolution with SPI interface, redundantly available for SPI (ETS25KX series).

ETP25K PWM singleturn encoder:
With PWM output

The ETA25KPM is a programmable kit encoder. The electrically effective angle of rotation of 10 turns (3600°, CW) is preset at the factory. If you need specific angle measuring ranges for your application (up to 72,000°, CW/CCW), you have the option of having the electrically effective angle of rotation and sense of rotation programmed by us or making the settings yourself on site. For the latter, we recommend our "PRO" programming unit. It can be used to make the settings for each and thus any number of encoders. Of course, you can adjust the encoder to the application by means of an (own) external circuit, which we describe in the programming instructions.

The wide selection of electronic variants for different power supplies as well as the large number of electrical interfaces for the output of measured values make it possible to optimally integrate ETx25K encoders into the application. In addition, the encoders can be customized. But already on the basis of the order matrices in the data sheets, hundreds of possible combinations can be realized at short notice. Popular options include

  • changing the sense of rotation from CW (clockwise) to CCW (counterclockwise),
  • user-defined rotation angles
  • a sealing ring for sealing between the housing and the mounting surface

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