Introduce

The XM-120 Eccentricity Module is a 2-channel monitoring device designed specifically for detecting and analyzing eccentricity in rotating machinery. As part of the Allen-Bradley™ XM® Series, this module is DIN rail-mounted and offers versatile condition monitoring and protection capabilities.

The XM-120 can function independently as a stand-alone unit or seamlessly integrate with Programmable Logic Controllers (PLCs) and various control system networks, providing flexible and reliable performance in both scenarios. Whether used in isolation or as part of a larger system, the XM-120 is engineered to deliver precise and consistent monitoring, making it an essential tool for maintaining the operational integrity of rotating equipment.

Specifications

Power

• Voltage: +21.6 to +26.4V DC
• Module Consumption:
  • Typical: 175 mA
  • Maximum: 300 mA
• Heat Production:
  • Maximum: 7 Watts (24 BTU/hr)
  • Typical: 4 Watts (14 BTU/hr)
• Isolation: Isolated 24V DC, user-configurable with wiring

Signal Conditioning

• Frequency Response:
  • Gap: 0.0039 to 20 Hz (0.235 to 1200 cpm)
  • Gap: 0 to 20 Hz (0 to 1200 cpm)
• Accuracy: ±1% of measurement
• Noise Floor: 8 mV RMS
• Specified Temperature: Ambient temperature of +25°C (+77°F)

Transducer

• Waveform:
  • Amplitude Range: ±21 V
  • Peak-to-peak Eccentricity, Max Gap, Min Gap: 5.2 mV
• Resolution: 5.2 mV
• Block Size: 256, 512, 1024, 2048
• Periods: 5 to 800 seconds

Environmental

• Operating Temperature: -20 to +65°C (-4 to +149°F)
• Storage Temperature: -40 to +85°C (-40 to +185°F)
• Relative Humidity: 95% non-condensing
• Conformal Coating: All printed circuit boards are conformally coated in accordance with IPC-A-610C.

Physical

• Dimensions:
  • Height: 3.8 in (97 mm)
  • Width: 3.7 in (94 mm)
  • Depth: 3.7 in (94 mm)
• Terminal Screw Torque: 7 pound-inches (0.6 Nm)