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Red cylindrical rotary encoder with radial cable, IP50 rated

Autonics Corp

Autonics Corp E40H12-1200-3-N-24 rotary encoder 1200 P/R NPN 12-24 VDC IP50 electrician tool

SKU CH-CMXB-PYFSW MPN E40H12-1200-3-N-24

Incremental rotary encoder with 1200 P/R resolution, NPN open-collector output and 12-24 VDC supply in an IP50 housing

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • 1200 P/R resolution for precise positioning
  • NPN open collector output simplifies control wiring
  • 12-24 VDC supply works with common industrial power
  • IP50 rating protects against dust ingress
  • 300 kHz response frequency supports high-speed motion

Incremental rotary encoder for position feedback

The Autonics E40H12-1200-3-N-24 is an incremental rotary encoder designed for industrial position and speed feedback. It delivers 1200 pulses per revolution through an NPN open collector output. The unit operates on a 12-24VDC supply with a five percent ripple tolerance. It is suited for automation systems requiring precise shaft-angle measurement.

Thermals noise and power draw in normal use

The encoder draws power from a 12-24VDC source with a maximum ripple of five percent. Its starting torque is rated at a maximum of 50gf.cm, equivalent to 0.0049N.m. The protection structure is rated IP50, guarding against dust ingress but not water. Maximum allowable revolution reaches 5000rpm with a response frequency up to 300kHz.

Build integration shaft and cable requirements

The encoder features a 12mm inner diameter shaft for direct mounting on compatible motor or machine shafts. A radial cable connection exits the body for straightforward wiring into control cabinets. The NPN open collector output interfaces directly with PLC inputs or counter modules. Buyers needing an absolute output type or a hollow shaft larger than 12mm should select a different model.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $145.99
Pricier than about 67% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameAutonics
Model nameE40H12-1200-3-N-24
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How do I mount the 12 mm shaft and what is the common wiring error with the NPN open collector output?

Fit the encoder onto a 12 mm shaft and secure the radial cable; the frequent mistake is forgetting a pull-up resistor on the NPN open collector so the signal never goes high.

Which part will need replacement first during long-term operation?

The internal bearings are the wear item; they see up to 5000 rpm and a starting torque of 0.0049 N·m, so plan for bearing replacement after heavy duty cycles.

What limits continuous high-speed use — the 300 kHz response or the 5000 rpm mechanical rating?

The 5000 rpm mechanical rating is the first hard limit; the 300 kHz electrical response would allow higher speed, but the encoder is not rated to spin faster than 5000 rpm.

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