Configured for differential expansion measurement in Bently Nevada 3300 System monitoring platforms, the Bently Nevada 3300/45-02-01-02-00 (3300/45 Dual Differential Expansion Monitor) provides direct physical/electrical execution for rotor position measurement and mechanical displacement monitoring.

Model Identification

The 3300/45-02-01-02-00 is a two-channel differential expansion monitoring module within the Bently Nevada 3300 System. The unit accepts eddy-current probe signals and converts measured shaft expansion displacement into analog current output and relay alarm states.

The module supports two independent monitoring channels with separate signal processing paths. It is configured for differential expansion measurement with a standard measurement range of +/-4 mm (+/-0.16 in) and provides 4-20 mA analog transmission for integration with external control or protection systems.

Hardware Specifications

Eddy-Current Probe Signal Processing

The 3300/45 module processes displacement signals generated by eddy-current proximity probes installed in the mechanical monitoring circuit. The measurement chain requires correct probe scaling and gap voltage validation to maintain accurate shaft position interpretation.

The probe input circuit operates with a -24 VDC excitation environment and evaluates dynamic displacement changes within the configured measurement range. Proper probe calibration and gap voltage verification are required before placing the channel into active monitoring service.

The module design supports rotor dynamics applications where differential expansion between rotating and stationary components must be monitored continuously.

Ordering Information

• 1 x Bently Nevada 3300/45-02-01-02-00 Dual Differential Expansion Monitor module
• 1 x Factory-installed electronic assembly
• 1 x Product identification label with model information
• 1 x Technical documentation package (when supplied)

Installation and Wiring Guidelines

Module Mounting

• Install the monitor module in the compatible Bently Nevada 3300 System rack position.
• Confirm rack power availability and grounding before electrical connection.
• Maintain proper mechanical fixation to prevent vibration-related connection issues.

Signal Wiring

• Use shielded wiring for eddy-current probe signal connections.
• Connect cable shields according to the plant grounding practice to reduce electrical interference.
• Separate probe signal wiring from high-current power cables.

Commissioning Checks

• Verify sensor polarity and signal direction before operation.
• Confirm probe gap voltage and displacement scaling parameters.
• Check relay output operation through controlled simulation before connecting to protection logic.

Frequently Asked Questions

• What measurement function does the 3300/45 module provide?

  The module monitors differential expansion displacement between rotating and stationary machine components using proximity probe input signals.

• How many monitoring channels are available?

  The 3300/45-02-01-02-00 provides two fully independent monitoring channels with separate measurement processing.

• What type of sensor input does this module accept?

  The module accepts eddy-current probe signals requiring -24 VDC excitation at 4 mA.

• Does the module provide analog transmission output?

  Yes. Each monitoring function supports a 4-20 mA analog output for external monitoring systems.

• What communication interface is available?

  RS-485 Modbus RTU communication is available as an optional configuration.

• What is the standard measurement range?

  The standard differential expansion measurement range is +/-4 mm (+/-0.16 in).

• Can the module be installed in a 3300 monitoring rack?

  The unit is designed as a Bently Nevada 3300 System module and requires compatible rack installation.

• What checks are required before startup?

  Verify probe wiring, signal scaling, gap voltage, grounding, and relay operation before commissioning.