Multi-Turn Magnetic Absolute Encoders

Bulletin 842A Multi-Turn Magnetic Encoder is a 25-bit absolute multi-turn shaft encoder. It provides up to 8192 pulses per turn or a maximum of 8192 turns. It uses a technology called Synchronous Serial Interface (SSI) to provide 24-bit resolution over just 5 wires. The SSI output from the 842A encoder can be interfaced in several different ways.

Bulletin 842A Multi-Turn Magnetic
  • Overview
  • Product Selection
  • Specifications
  • Documentation
  • Resources
  • Applications

Features

  • Reduced wiring cost and complexity
  • Noise immunity achieved via differential communication format
  • Simplified start-up
  • Choice of gray code or natural binary formats

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Specifications

TitleNumberDownload
842A Absolute Encoders Installation Instructions842A-IN001

Certifications

CE Marked

Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Product Certifications

See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Documentation

TitleNumberDownload
842A Absolute Encoders Installation Instructions842A-IN001
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Product Certifications

See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Configuration & Selection Tools

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Other Resources

  • Knowledgebase — Visit our online resource for technical information, support chat and forums, software updates, and product safety advisories/notices.

Applications

Typical applications for Bulletin 842A Multi-turn Magnetic Encoders include:

  • Steel mills
  • Overhead cranes
  • Punch press
  • Transfer lines
  • Oil rigs
  • Wind mills
  • Machine tools
  • Packaging

Motion Control Case Studies — View our case studies site to discover how customers have applied Allen-Bradley Motion Control products in their applications.