Rockwell Automation’s new range of 843ES CIP Safety over Ethernet/IP Encoders.

The 843ES CIP Safety over EtherNet/IP™ Encoders are designed for safety applications that require speed, direction, or position monitoring safety functions. These encoders support the GuardLogix® controller-based safety functions, according to IEC 61800-5-2, in the Studio 5000 Logix Designer® application. By providing auxiliary feedback directly through an EtherNet/IP network on CIP Safety, it makes it easier to achieve the desired safety integrity or performance level by reducing the number of components needed and utilizing the already available advanced drive safety instructions.



  • Rated up to and including SIL 3 according to IEC 61800-5-2, IEC 620261, and IEC 61508-1
  • Rated up to and including PLe, Cat. 3, according to ISO 13849-1
  • Clamping, synchro, and square flange options for solid shaft
  • Blind-hollow shaft available with stator coupling
  • Feather key solid shaft to prevent relative rotation
  • Dual Ethernet ports with embedded EtherNet/IP switch for linear networks and Device Level Ring topologies
  • IP67 washdown rating
  • Small form factor
  • 15-bit safety resolution, 18-bit standard resolution
  • 12-bit multi-turn resolution


  • Added safety – When used as part of an integrated safety system that includes a GuardLogix® 5580ES controller or Compact GuardLogix 5380ES controller, the 843ES CIP Safety Encoder provides safety ratings up to and including SIL CL3 and PLe Cat 3. (Studio 5000 Logix Designer® application version 31 or later is required.)
  • Reduced design time – The ability to integrate the safety functions over EtherNet/IP provides the opportunity to reduce hardware and installation costs. Use the position, velocity, and acceleration feedback from the 843ES CIP Safety encoder to program safety functions on the same network and controller as the standard control.
  • Higher productivity – The ability to continue production while safely monitoring for speed, direction, or position helps improve productivity and overall machine performance.
  • More visibility – The integration of the safety and standard control systems provides operators and maintenance personnel with visibility to all machine events – including safety events. This helps enable a quick response that allows the machine to return to full production faster.


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