Bently Nevada 177988-01 Vibration Input/Output Module

Product Description

The 177988-01 is a versatile I/O module for the Bently Nevada 3701/40 ADAPT system, providing a direct interface between field sensors and the 177896-05 processor. It supports Proximity Probes, Accelerometers, and Seismic (Velomitor) sensors, enabling comprehensive machinery protection on turbines, compressors, and high-speed rotating equipment.

Built for distributed installation, the module can be mounted close to the machine train, reducing cabling costs while ensuring high-speed vibration monitoring and System 1 software integration. Its G3-rated conformal coating makes it suitable for harsh chemical environments, and it carries hazardous area approvals including CSA, ATEX, and IECEx.

Key Specifications

• Module Type: Prox/Accel/Seismic Input/Output Module

• System Series: Bently Nevada 3701/40 ADAPT

• Part Number: 177988-01

• Supported Sensors: Proximity Probes, Accelerometers, Seismic (Velomitors)

• Channel Configuration: Up to 12 sensor inputs + 2 Keyphasor/Tachometer inputs

• Signal Conditioning: Internal filtering & sensor power supply

• Mounting: ADAPT baseplate compatible

• Connectivity: Terminal blocks for secure field wiring

• Environmental Protection: G3 Conformal Coating

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

• Hazardous Area Approvals: CSA, ATEX, IECEx (Class I, Div 2 / Zone 2)

Applications

• Monitoring aeroderivative gas turbines, hydro-turbines, and high-speed compressors

• Aggregating shaft-relative (Prox) and casing-absolute (Accel/Seismic) measurements

• Ideal for complex machine trains with mixed sensor types

Technical FAQ

• Why choose the Prox/Accel/Seismic design?
  This universal I/O module reduces spare part inventory and simplifies field wiring for machines with diverse sensor types.

• Does it require a separate sensor power supply?
  No. It supplies required power directly to connected sensors through the field terminals.