The Bently Nevada 3500/46M 140734-06, also cataloged as the 3500/46M Hydro Monitor, operates as a dedicated hardware component for hydraulic pressure monitoring and vibration signal conditioning within the 3500 Machinery Protection System.

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

The module processes dynamic data from proximity probes and velocity sensors. Calibration requires adherence to eddy-current probe scaling factors specific to the transducer type. Gap voltage validation must confirm a steady -10 VDC target at the monitor input terminals under static conditions prior to commissioning. Rotor dynamics analysis relies on the accurate capture of shaft displacement relative to the bearing housing. Cross-talk suppression circuitry minimizes interference between adjacent monitoring channels on the same backplane.

Technical Inquiries

Q: Does the 3500/46M 140734-06 support hot-swapping in a redundant rack configuration?

A: No. The module does not support hot-swap replacement. Removal from an energized rack requires system shutdown to prevent backplane communication errors and spurious trip signals.

Q: What is the typical current draw from the rack power supply?

A: The module draws power from the rack's 24 VDC bus. Total current consumption must be calculated against the rack's power budget; consult the 3500 Series Power Supply Module documentation for load limits.

Q: Can this monitor interface directly with Keyphasor signals?

A: No. The 3500/46M is configured for hydro monitors and seismic inputs. Keyphasor processing requires a dedicated 3500/20 or 3500/25 module.

Field Wiring and Grounding Practices

Install the module in a standard 3500 Series rack using the captive screws. Maintain separation of signal wiring from power cables by a minimum distance of 15 cm (6 inches) to reduce inductive coupling. Shielded twisted-pair cable is mandatory for all transducer connections. Connect the cable shield drain wire to the rack ground bus at one point only, preferably at the rack termination panel, to avoid ground loops. Verify probe gap voltage (-10 VDC nominal) before finalizing mechanical installation of the proximity probe.

Ordering Information

• 3500/46M 140734-06 Hydro Monitor module
• Spare part number: 140734-06
• Mounting hardware for 3500 rack

Shipment Schedule

Dispatch occurs within 2-7 days following receipt of cleared payment. Units are shipped via DHL, FEDEX, or UPS. Packaging consists of anti-static industrial wrapping with foam-in-place cushioning to prevent electrostatic discharge and mechanical shock during transit.