We developed a custom solution for the 20-2951-250 encoder, intended for systems where 250 PPR incremental feedback must remain stable under compact mounting, PLC counter input, and industrial EMC conditions. This configuration uses a rectangular die-cast zinc housing, Ø6 mm solid shaft, square flange, M16 5-pin connector, and 10–30 V push-pull incremental output. It is not an absolute encoder or a fieldbus device. It is a pulse-feedback solution where A/B phase quality, edge stability, grounding, and counter compatibility determine whether the signal remains usable. Typical production lead time: 15 working days.

Custom Solution Photos

20-2951-250 Push-Pull Incremental Encoder-EncoderWorks
20-2951-250 Push-Pull Incremental Encoder-EncoderWorks

Stable operation depends on rigid mounting, shaft alignment, connector stability, and clean pulse transmission.

System Limits

  • Poor shielding → false pulse edges
  • Weak mounting → A/B phase instability
  • Counter mismatch → missed or unstable counts

This model uses A/B/0 incremental push-pull output with a maximum output frequency of 160 kHz. At 250 PPR, the counter load is moderate, but EMC noise, cable routing, and grounding still define real system reliability. The IP40 enclosure also means the encoder should not be used in washdown, coolant, or high-moisture environments.

Installation and Wiring Constraints

  • Wire GND / +Ub / A / B / 0 correctly
  • Keep the M16 5-pin connector stable
  • Route signal cable away from inverter and motor power lines
  • Maintain shaft load within 10 N axial / 10 N radial
  • Keep speed within 3000 rpm

Failure boundary:

  • Wrong A/B phase interpretation → reversed counting
  • Poor grounding → unstable edge detection
  • Moisture exposure → reliability reduction
  • Excess shaft load → shortened mechanical life

Replacement and Interface Mapping

  • Suitable for 250 PPR incremental speed and position feedback
  • Applicable where compact rectangular housing and push-pull output are required
  • Not suitable for absolute positioning, fieldbus systems, or wet environments

Key Data

  • Model: 20-2951-250
  • Type: Incremental encoder
  • Pulse count: 250 PPR
  • Output: Push-pull A/B/0
  • Supply voltage: 10–30 VDC
  • Max frequency: 160 kHz
  • Connector: M16 5-pin
  • Shaft: Ø6 mm
  • Protection: IP40
  • Max speed: 3000 rpm
  • Temperature: -20 °C to +60 °C