The Bently Nevada 3500/46M 176449-06, also cataloged as the 3500/46M Hydro Monitor, operates as a dedicated hardware component for hydraulic pressure and dynamic signal monitoring within the 3500 Machinery Protection System.

Electrical & Mechanical Data

Gap Voltage Validation and Rotor Dynamics Processing

The module conditions signals from eddy-current proximity probes and pressure transmitters. Commissioning requires verification of gap voltage at a nominal -10 VDC target at the probe-termination block to confirm linear range operation. Rotor dynamics analysis is supported through configurable low-pass and gap filters to reject static hydraulic drift while preserving dynamic vibration components. Internal cross-talk suppression minimizes channel interference on the backplane bus.

Technical Inquiries

Q: Is the 3500/46M 176449-06 hot-swappable?

A: No. Remove and insert the module only with the rack de-energized to prevent backplane communication faults and false alarm assertions.

Q: What is the typical backplane current draw?

A: At 24 VDC the module draws approximately 320 mA (7.7 W typical). Verify rack power supply headroom per the 3500 Power Supplydatasheet.

Q: Can this module replace a 3500/46M with a different suffix?

A: Suffix variations indicate firmware or I/O configuration differences. Verify compatibility with the installed rack firmware version before substitution.

Field Installation Guidelines

Mount the module in the designated slot of a 3500 rack and secure with the front-panel thumbscrew. Use individually shielded twisted-pair cables for all transducer inputs; terminate the shield drain at the rack ground bus bar only—never at both ends. Separate signal cables from AC power or relay wiring by a minimum of 15 cm (6 in). Perform a gap voltage check (-10 VDC nominal for eddy-current probes) after mechanical installation and prior to enabling alarms.

Ordering Information

• 3500/46M 176449-06 Hydro Monitor Module
• Spare part reference: 176449-06
• 3500 rack mounting hardware included

Dispatch & Packaging

Shipment is processed within 2-7 days after payment confirmation via DHL / FEDEX / UPS. Each module is sealed in anti-static ESD shielding with shock-absorbent industrial foam inserts to prevent electrostatic damage and transit impact.