Rockwell Automation 1440-VST02-01RA XM-120 Eccentricity Module - Manual (Page 71)

Publication GMSI10-UM010C-EN-P - May 2010
Specifications 63
Signal Conditioning
Frequency Response
Accuracy
Gap Resolution
Waveform
Amplitude Range
Peak-to-peak Eccentricity, Max Gap, Min
Gap: 0.0039 to 20 Hz (0.235 to 1200 cpm)
Gap: 0 to 20 Hz (0 to 1200 cpm)
±1% of measurement
Noise Floor: 8 mV RMS
Specified at ambient temperature of +25°C
(+77°F)
5.2mV
Block Size: 256, 512, 1024, 2048
Periods: 5 to 800 seconds
±21 V
Complex Data Waveform (asynchronous)
Measured Parameters
Speed
Peak-to-peak eccentricity
Gap (or transducer bias voltage)
Min Gap
Max Gap
RPM
Peak-to-peak eccentricity is the difference
between the positive and the negative
extremes of the rotor bow.
µm or mils
Volts
Volts
Volts
Alarms
Number
Operators
Hysteresis
Speed Inhibit
2 alarm and danger pairs (one each for the
eccentricity measurements)
Greater than
Less than
Inside range
Outside range
User configurable in software
A speed range may be specified for each
alarm. When applied, the alarm is disabled
when speed is outside of the defined range.
XM-120 Eccentricity Technical Specifications
Product Feature Specification