Rockwell Automation 1440-VSE02-01RA XM-122 gSE Vibration Module - Manual (Page 11)

1 Publication GMSI10-UM013D-EN-P - May 2010
Chapter
1
Introduction
This chapter provides an overview of the XM-122 gSE Vibration module. It
also discusses the components of the modules.
Introducing the XM-122
gSE Vibration Module The XM-122 gSE Vibration module is an intelligent 2-channel special-purpose
vibration monitor. It is part of the Allen-Bradley™ XM
®
Series, a family of
DIN rail mounted condition monitoring and protection modules that operate
both in stand-alone applications or integrate with Programmable Logic
Controllers (PLCs) and control system networks.
The XM-122 module includes special circuitry and firmware that enables it to
measure both conventional vibration (similar to the XM-120) and g’s Spike
Energy™ (gSE). This makes the module ideal for monitoring machines with
rolling element bearings.
gSE is an Entek developed signal processing technique that provides an
accurate measure of the energy generated by transient or mechanical impacts.
The gSE measurement provides early detection of surface flaws in
rolling-element bearings, metal-to-metal contacts, insufficient bearing
lubrication, and process-related problems, such as dry running, cavitation, flow
change, and internal re-circulation.
The XM-122 alternates collection of conventional vibration measurements
and gSE overall and gSE spectra measurements. The time the module spends
updating each set of measurements during a monitoring-time is dependant on
the configuration. The module continuously monitors transducer bias and
speed as well.
The XM-122 can power and accept input from standard eddy current probe
systems and Integrated Electronics Piezo Electric (IEPE) accelerometers. It
can also accept signals from most standard voltage output measurement
devices such as a velocity or pressure transducer. In addition to vibration
inputs, the XM-122 accepts one tachometer input to provide speed
measurement and order analysis functions.
For information about See page
Introducing the XM-122 gSE Vibration Module 1
XM-122 Module Components 2
Using this Manual 3