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XM-120E Eccentricity Module

Bulletin 1440 Eccentricity Modules

The XM® 120E Eccentricity Modules are XM-120 Standard Dynamic Measurement Modules that are loaded with XM-120E Firmware. These modules provide four key measurements including the peak-to-peak eccentricity value, the instantaneous gap value and the minimum and maximum observed gap values. They can operate stand-alone or on DeviceNet™ networks to provide real-time data and status information to other XM modules, programmable controllers, distributed control systems, and condition monitoring systems.


  • Dynamic inputs measure eddy current
  • Tachometer input measures speed from 1 to 1.2M RPM from a pulse signal of 1…50,000 events per revolution
  • Two isolated 4…20 mA outputs
  • Communicate via DeviceNet™ network
  • Single on-board relay
  • Four virtual relays or four additional relays (when connected to an XM® 441 Expansion Relay Module)


  • XM-120E Eccentricity Modules


  • UL, CSA, EEX, CE, C-Tick

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


Use the pre-programmed faceplates and templates in FactoryTalk View performance and visbility software to interface XM® modules that are integrated with Logix5000™ controllers.

  • FactoryTalk® View Machine Edition software is ideal for machines and small processes.
  • FactoryTalk View Site Edition software is ideal for enterprise solutions.

Use Emonitor software for predictive maintenance analysis.

Learn More

Additional software products are available from Rockwell Software.

Frequently Viewed Publications

XM Monitoring Modules Specifications Technical Data1440-TD001
XM-120 Eccentricity Module User ManualGMSI10-UM010
More Condition Monitoring publications in Literature LibraryAll Languages


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

Can’t Find What You Need?

Browse our Literature Library where you can search for additional publications in more languages. You can also use the Advanced Search feature to search by catalog number, publication type, title, or keywords to narrow your results.

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Configuration and Selection Tools

Other Resources

  • Electronic Data Sheets — Find DeviceNet™, ControlNet™, EtherNet/IP™, and network-independent EDS files.
  • Firmware Updates — Log in to get support for firmware updates.
  • Integrated Architecture Podcasts — Select from a list of podcasts to learn more about the Integrated Architecture™ system.
  • Knowledgebase — Visit our online resource for technical information, support chat and forums, software updates, and product safety advisories/notices. 


We offer a variety of accessories for your XM® 120E Eccentricity Modules, including:

  • Fuse kits
  • Serial communication cables
  • Terminal bases
  • XM Serial Configuration Utility

View all accessories in the XM Monitoring Modules Specifications Technical Data [PDF]


The XM® 120E Eccentricity modules are suitable for monitoring rotor bow in steam turbines.

Customer Success

  • Condition Monitoring Case Studies — View our case studies site to discover how customers have applied Allen-Bradley® Condition Monitoring products in their applications.