Magnetic rotary encoder
Pepperl+Fuchs ENA42HD magnetic rotary encoder
Heavy-duty 42 mm magnetic absolute encoder sealed to IP68 and IP69K, with 16-bit single-turn and 15-bit multi-turn resolution over CANopen, J1939, SSI, IO-Link or analogue, up to 6,000 rpm.
Need this part, a replacement or a complete package? Our experienced UK engineering team helps you select, source and obtain the right products, with pricing, delivery coordination and after-sales support.
UK engineering team · Product sourcing · Supply support
Get pricing, sourcing and replacement support
Need Pepperl+Fuchs parts, a replacement or another suitable option? Send your part number or describe what the machine needs to do. We connect your requirement with experienced UK engineering and procurement support to help you get the right products, pricing and supply options. Your matched provider can take the enquiry through quotation and ordering to delivery and after-sales support.
- Source original parts or assess suitable alternatives
- Get pricing, lead times and a defined supply proposal
- One enquiry for components, complete axes and ongoing support
No obligation to buy. Choose the quick form below or use the full configurator on this page. Add what you know; an engineer can help with the details.
Need help choosing? Build a specification →Spec builder
Specify what you need instead of ENA42HD
Select the products and performance you need. Our UK engineering team can use your specification to help source the right components, pricing and supply options. See your summary before adding contact details.
Already know the part number? Use the quick enquiry form. You can configure a requirement below without registering.
- 1Products
- 2Performance
- 3Environment
- 4Volumes
- 5Your spec
What are you specifying?
Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Speed (max) | 6,000 rpm |
|---|---|
| Ingress protection | IP68 / IP69K |
| Data / bus | CANopen, SAE J1939, SSI, IO-Link, analogue |
| Resolution (max) | 31 bit |
| Resolution | 16 bit single-turn + 15 bit multi-turn |
| Housing | 42 |
Summarised in our own words from Pepperl+Fuchs SE (family-owned)'s published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
Temperature range not given in the overview.
Specify Motion is not affiliated with Pepperl+Fuchs SE (family-owned). Pepperl+Fuchs and ENA42HD are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Pepperl+Fuchs ENA42HD replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original Pepperl+Fuchs part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
Compact incremental head with wide -40 to +125 C range; IKP11 is the open IP00 version. Works on linear and rotary scales.
Incremental magnetic head with analogue sin/cos output. Works on linear and rotary scales.
Rugged incremental head with RS422 or HTL output and 10-30 VDC supply option. Works on linear and rotary scales.
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Typical applications
What a magnetic rotary encoder is
A magnetic rotary encoder measures angle by sensing the field of a magnet with Hall-effect or magnetoresistive sensors. On-axis designs place a diametrically magnetised magnet on the shaft end above a sensor chip; off-axis designs read a multi-pole magnetic ring around a hollow shaft. Signal processing turns the field into absolute or incremental position. Because there is no optical path, magnetic encoders tolerate dust, oil, moisture and vibration, typically with moderate resolution and accuracy at low cost.
When engineers choose a magnetic rotary encoder
Choose a magnetic rotary encoder for robust, compact feedback in harsh or cost-sensitive applications, such as motors, AGVs, robotics, agricultural and mobile machinery. Off-axis rings suit hollow joints. The trade-offs are accuracy and magnetic interference: accuracy is typically lower than optical, and strong stray fields from brakes or motors can affect the reading. For high precision, choose optical. Consider shielding and mounting tolerances carefully.
How to specify the Pepperl+Fuchs ENA42HD
Send these with your enquiry and an engineer can confirm the right ENA42HD variant or an equivalent:
- Resolution (bits or counts)
- Accuracy (degrees or arcmin)
- Absolute or incremental output
- On-axis or off-axis ring mounting
- Interface: SSI, BiSS, SPI, PWM or analogue
- Mounting tolerances: gap and runout (mm)
- Environment and IP code
Common mistakes to avoid
- Mounting near brakes or motor magnets without shielding
- Exceeding the allowed air gap or runout
- Expecting optical accuracy from a magnetic encoder
- Overlooking calibration after installation
Pepperl+Fuchs ENA42HD: frequently asked questions
Can you help replace Pepperl+Fuchs ENA42HD or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Pepperl+Fuchs ENA42HD?
Heavy-duty 42 mm magnetic absolute encoder sealed to IP68 and IP69K, with 16-bit single-turn and 15-bit multi-turn resolution over CANopen, J1939, SSI, IO-Link or analogue, up to 6,000 rpm. Published series figures include speed 6,000 rpm, resolution 31 bit. It is made by Pepperl+Fuchs SE (family-owned); Specify Motion can help source it or propose an equivalent.
Who makes the Pepperl+Fuchs ENA42HD?
The Pepperl+Fuchs ENA42HD is made by Pepperl+Fuchs (Pepperl+Fuchs SE (family-owned)) and is listed here for engineers comparing options. Specify Motion is not affiliated with Pepperl+Fuchs SE (family-owned); brand names are used only to identify the product.
What is the speed of the Pepperl+Fuchs ENA42HD?
The published series maximum speed is 6,000 rpm. Individual models and sizes in the ENA42HD range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the Pepperl+Fuchs ENA42HD?
We can assess suitable replacement options. On published figures, Bogen IKS11 / IKP11 and Bogen IKS15 / IKS15.1 are options to assess from our supply network. An engineer confirms the fit against your application before recommending anything.
Are magnetic encoders as accurate as optical encoders?
Typically not. Magnetic encoders tolerate contamination and vibration well but usually have lower accuracy and resolution than optical encoders of similar size. Self-calibration and good mounting can improve results. For high-precision positioning and metrology, optical encoders remain the usual choice, while magnetic types win on robustness and cost.
What is the difference between on-axis and off-axis magnetic encoders?
On-axis encoders read a single magnet on the end of a shaft, which is simple and compact. Off-axis encoders read a magnetic ring around a shaft, which leaves the centre free for hollow shafts or cables. Off-axis designs are more sensitive to mounting tolerances.
Further reading: Magnetic vs capacitive vs optical encoders · How to select an encoder · Encoders and feedback
Other magnetic rotary encoder series
Engineer support
Let our experienced engineers do the hard work for you
Tell us how you use the Pepperl+Fuchs ENA42HD: the load, speed, duty and environment. Our engineers will confirm whether it is still the right part, find it for you, or propose an alternative that fits better.
- Reviewed by an engineer, not an autoresponder
- Like-for-like and better-fit alternatives
- Standard, modified and custom options
Prefer to configure it? Use the spec builder.
UK engineering input · A route to buying the right products
From your enquiry to products, delivery and support
Specify Motion helps turn a part number or application into a purchasing enquiry. We provide recommendations and connect your requirement with a relevant engineering or procurement provider for product selection, pricing, sourcing and supply.
- Tell us what you needSend a code or configure the application, quantities and timing.
- Reach a relevant providerAccess experienced UK engineering input and a suitable procurement route.
- Review the quotationYour provider confirms the products, price, compatibility checks and supply terms.
- Order with delivery and support agreedConfirm delivery, warranty and after-sales arrangements with the contracting provider.
You choose whether to proceed with the provider and should carry out your own checks. Website and introduction service terms.