Bently Nevada 1034549-21 FieldMonitor Seismic Input Module

Product Description

The 1034549-21 is a dual-channel Seismic Input Monitor for the Bently Nevada FieldMonitor system. It continuously measures casing vibration using accelerometers or Velomitors, providing high-fidelity data for rotating machinery protection where shaft-relative measurements are not suitable.

Designed for decentralized monitoring, this module can be installed close to machinery to reduce cable runs and minimize signal interference. Its rugged, industrial-grade construction ensures reliable operation in power plants, refineries, and pumping stations.

Key Specifications

• Module Type: Seismic Input Monitor

• System Series: Bently Nevada FieldMonitor

• Part Number: 1034549-21

• Channels: 2 per module

• Supported Sensors: Accelerometers (Charge or IEPE), Velomitors

• Frequency Range: 10 Hz – 1 kHz

• Signal Processing: Peak or RMS vibration calculation

• Input Power: 24 VDC via FieldMonitor baseplate

• Output: Digital bus to FieldMonitor Terminal Module

• Operating Temperature: -30 °C to +70 °C (-22 °F to +158 °F)

• Status Indicators: OK, Alert, Danger LEDs

• Environmental Protection: Conformal coated for moisture and contaminant resistance

Applications

• Monitoring industrial fans, large motors, and centrifugal pumps

• Detecting bearing housing defects, structural resonance, and mechanical looseness

• Ideal for decentralized installations to minimize cabling and EMI

Technical FAQ

• Can it be used with proximity probes?
  No. It is designed for seismic (casing-mounted) sensors only. Use a Proximitor Input Module for shaft-relative measurements.

• Does it support velocity integration?
  Yes. When paired with an accelerometer, it can integrate acceleration to velocity units (mm/s or in/s) for general machinery health assessment.