Allen-Bradley Home

Protection Systems

General Resources



XM-120 & 121 Dynamic Measurement Modules

Introduction Communications Inputs Tachometer Outputs Indicators Signal Conditioning
Complex Data Measured Parameters Data Buffers Alarms Relays Max Speed Capture Non-Volatile Configuration
Power Approvals Environmental Physical Ordering Informaton

Signal Conditioning


Sampling Modes:

  • Asynchronous
  • Synchronous


Frequency Range:

1 Hz to 20 kHz


Resolution:

  • A/D Conversion: 24 bits
  • Dynamic Range: >80dBfs (0.01% fs), -90dBfs (typical)
  • FFT Lines / Waveform block size
    • 100 / 256
    • 200 / 512
    • 400 / 1024
    • 800 / 2048


Amplitude Range:

Dependent on sensitivity


Integration:

Two levels provided, first in hardware, second in firmware.


Averaging:

Any number of averages may be specified. If sampling mode is:

  • Asynchronous: Averaging will be done on the spectra.
  • Synchronous: Averaging will be performed on the time waveforms.


Low Pass Filters:

Independently configured per channel:

  • Spectra FMAX: 10 Hz - 20 kHz
  • Optional Overall measurement LP filter: 200 Hz - 20 kHz; Roll Off: -24 dB per octave


High Pass Filters:

Independently configured per channel:

  • XM-120:
    • Integration OFF: 1, 5, 10, 40, 1000 Hz; Roll Off: -30 dB per octave for the 1 Hz HPF, otherwise -24 dB per octave
    • Integration ON: 5, 10, 40, 1000 Hz; Roll Off:
      • Single Integration: -30 dB per octave for the 5 Hz HPF, otherwise -24 dB per octave
      • Double Integration: -42 dB per octave for the 5 Hz HPF, otherwise -24 dB per octave
  • XM-121:
    • Integration OFF: 0.2, 0.8, 2, 4, 23.8 Hz;Roll Off: 30 dB per octave for the 0.2 Hz HPF, otherwise 24 dB per octave
    • Integration ON: 0.8, 2, 4, 23.8 Hz; Roll Off:
      • Single Integration: -30 dB per octave for the 0.8 Hz HPF, otherwise -24 dB per octave
      • Double Integration: -42 dB per octave for the 0.8 Hz HPF, otherwise -24 dB per octave


Units:

  • g
  •     
  • mm/s
  • um
  •     
  • psi
  • ips
  •     
  • mils
  • volt
  •     
  • Pa