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Red cylindrical rotary encoder with radial cable, Ø8 mm shaft, IP50 rated

Autonics Corp

Autonics Corp E40H8-2500-3-N-24 rotary encoder 2500 P/R NPN 12-24 VDC

SKU CH-E72A-M7NBJ MPN E40H8-2500-3-N-24

An incremental rotary encoder delivering 2500 pulses per revolution with NPN open-collector output on a 12-24 VDC supply

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • High-resolution positioning with 2500 pulses per revolution
  • Fast response up to 300 kHz signal frequency
  • Reliable operation up to 5000 rpm maximum speed
  • Flexible 12-24 VDC power supply range
  • IP50 protection against dust ingress

High-resolution incremental encoder

The Autonics E40H8-2500-3-N-24 is a 2500 P/R incremental rotary encoder with NPN open-collector output. It suits engineers and technicians who need precise position feedback for motion-control systems. The 12-24 VDC supply range fits common industrial power rails. This unit is not for buyers who require absolute-position data or a hollow-shaft design.

Thermal and electrical behaviour

The encoder draws power from a 12-24 VDC source with a maximum 5 % ripple. Starting torque is rated at max 0.0049 N.m, keeping mechanical drag low during operation. Maximum response frequency reaches 300 kHz, supporting high-speed counting without signal loss. IP50 protection guards internal optics against dust in normal indoor environments.

Mounting and connection details

A radial cable exits the housing for straightforward wiring in tight cabinets. The solid shaft measures Ø8 mm, matching standard couplings and gear setups. Maximum allowable speed is 5000 rpm, covering most servo and stepper applications. The package includes one encoder; no mounting hardware or configuration software is supplied.

How it compares

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Price $90.99
Typical for this category: the median of 5,006 items is $95.99.

Specifications

Product
Brand nameAutonics
Model nameE40H8-2500-3-N-24
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How do I wire the NPN open collector output of the E40H8-2500-3-N-24 to my controller?

Connect the 12-24 VDC supply to the power leads, then pull the signal line high through a resistor to the same supply rail; the encoder sinks current to ground on each pulse, giving a clean logic level to the input module.

What maintenance does the Ø8 mm shaft of the E40H8-2500-3-N-24 require over time?

The IP50 rating blocks dust but not moisture, so keep the shaft seal clean and dry; inspect the radial cable entry for abrasion and verify the 50 gf·cm starting torque has not increased, which would indicate bearing wear.

Which limit appears first when running the E40H8-2500-3-N-24 continuously at high speed?

The 5000 rpm mechanical rating is reached before the 300 kHz electrical response frequency would restrict operation, so shaft speed is the practical ceiling for sustained use.

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