Bently Nevada 177989-01 Vibration Input/Output Module

Product Description

The 177989-01 is a PAV (Proximity/Accel/Velom) I/O module for the Bently Nevada 3701/40 ADAPT system. It interfaces Proximitor sensors, accelerometers, and Velomitors to deliver high-fidelity vibration data to the processor for real-time machinery protection.

Designed for distributed monitoring, it mounts near the machine train to reduce cabling and operates reliably in harsh industrial environments with G3-rated protection. Ideal for aeroderivative turbines, compressors, and large fans, it provides a unified view of machine health, from shaft vibration to casing velocity.

Key Specifications

• Module Type: PAV I/O Module

• System Family: 3701/40 ADAPT

• Part Number: 177989-01

• Sensor Support: Proximitor, Accelerometer, Velomitor

• Input Channels: Up to 12 vibration + 2 Keyphasor/tachometer inputs

• Signal Conditioning: Built-in filtering and sensor power

• Environmental Rating: ISA S71.04 G3, Conformal Coated

• Operating Temperature: -30 °C to +65 °C (-22 °F to +149 °F)

• Certifications: ATEX, IECEx, CSA (Class I Div 2 / Zone 2)

• Mounting: ADAPT terminal baseplate

Applications

• Hybrid sensor monitoring on gas turbines, compressors, and industrial fans

• Supports shaft-relative and casing-absolute measurements

• Provides velocity-based alarm integration for comprehensive machine protection

Technical FAQ

• Difference from 177988-01?
  The 177989-01 is optimized for Velomitor integration, alongside standard Prox and Accel sensors.

• Supports Keyphasor inputs?
  Yes, for phase-locked vibration analysis (1X, 2X, etc.).