Bently Nevada 3500/22M Transient Data Interface

The Bently Nevada 3500/22M 138607-01, also cataloged as the 3500/22M Transient Data Interface (TDI), operates as a dedicated hardware component for continuous steady state and transient dynamic waveform data acquisition within the 3500 monitoring system rack.

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

The TDI processes raw dynamic waveform data from M series monitors including the 3500/40M and 3500/42M. Eddy-current probe scaling requires precise gap voltage validation at -10 VDC targets to maintain linear displacement measurement across the probe tip clearance range. The module collects transient data through the rack backplane and forwards scaled values to System 1 Condition Monitoring and Diagnostic software. Cross-talk suppression between adjacent transducer channels is executed at the hardware level to prevent signal contamination during high-frequency rotor dynamics capture.

Frequently Asked Questions

Q: Does the 3500/22M support hot-swap insertion while the rack remains powered?

A: No. The rack must be placed in Trip Multiply mode before removing or inserting the TDI module. The front panel USB-B port provides local configuration access but does not bypass the power-removal requirement for physical module exchange.

Q: What is the backplane current load imposed by the TDI on the 3500 rack power supplies?

A: The module consumes 10.5 W during normal operation. With a maximum current draw of less than 1 mA dc at the dry contact to common terminal, the electrical load remains within the standard 3500 rack power budget without requiring derated supply calculations.

Q: Which software platforms are compatible with the 3500/22M for configuration and data collection?

A: The TDI interfaces with System 1 Condition Monitoring and Diagnostic software and 3500 System Configuration software. Compatibility with specific M series monitor firmware revisions should be verified against the compatibility section in the official Bently Nevada documentation.

Field Installation Guidelines

Mount the TDI in the slot directly adjacent to the rack power supplies. This slot assignment is fixed and non-negotiable within the 3500 rack architecture. Secure the module using the captive mounting screws at both ends of the front panel. Connect the Ethernet link to the host system before applying rack power. For gap voltage validation of connected eddy-current proximity probes, verify the -10 VDC target at the probe tip using a calibrated voltmeter before final rack closure. Ensure all transducer shield drain wires terminate to the rack ground bus bar at a single point to prevent ground loops. Tighten NPT conduit connections to a minimum of 5 thread engagements where applicable for environmental sealing.