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Configured for [Specific Technical Task] in [System/Network Name], the Bently Nevada 149369-01 (3500/25 Enhanced Keyphasor Module) provides direct physical/electrical execution. The half-height module conditions raw multi-event pulses from proximity probes or magnetic pickups, converting physical shaft rotations into digital timing pulses and RPM metrics. This raw conditioning layer feeds accurate phase angle and speed parameters directly across the internal backplane to vibration monitoring modules for synchronous vector tracking.

Hardware Specifications

Parameter Specification
Model 149369-01
Brand Bently Nevada
Origin USA
Weight 0.91 kg
Dimensions 241 mm x 24.4 mm x 163 mm
Operating Temp -30 to +65 deg C
Power Consumption 7.7 Watts (Maximum)
Module Type Enhanced Keyphasor Module (Half-height)
Channel Configuration Dual-channel input
Input Signal Type Proximity probes or magnetic pickups
Input Impedance 10 kOhm
Frequency Range 0.017 Hz to 100 kHz (1 RPM to 6,000,000 RPM)
Phase Accuracy +/-1 degree
Buffered Output 0 to 20 V DC (150 Ohm output impedance)
Supply Voltage -24 V DC (via rack backplane)

Machinery Monitoring and TSI Features

The module provides structural management for eddy-current probe scaling when translating physical shaft discontinuities (such as notches or keyways) into uniform timing indicators. Field technicians must complete gap voltage validation to ensure proximity transducer targets maintain stable dc bias levels within the nominal -10 VDC operational envelope. The unit routes continuous speed measurements directly through the internal rack bus, enabling rapid cross-talk suppression and real-time computation of complex rotor dynamics parameters, including shaft centerline plots, polar trends, and filtered vector vectors.

Frequently Asked Questions

Q: How does the half-height form factor affect chassis mounting and slot layout constraints?

A: The half-height design occupies one lower or upper half-slot within the 3500 chassis. It requires a half-height wave guide and a matching half-height I/O module positioned directly behind it to guarantee proper backplane alignment.

Q: What is the calibrated tracking accuracy for raw speed monitoring applications?

A: The module executes speed monitoring calculations with a steady-state accuracy profile of +/-0.05% of the selected full scale, resolving speed variations down to 0.1 RPM at a 1000 Hz internal sampling loop rate.

Field Installation Guidelines

  • Transducer Gap Verification: Measure the dc gap voltage of the connected proximity probe using a digital multimeter prior to system startup. Adjust the probe depth to secure a -10 VDC target base over the uniform cylindrical surface of the shaft.
  • Shield Continuity Management: Route the transducer extension cables in dedicated, isolated conduits. Terminate the outer braided shields cleanly at the 3500 terminal block ground point only, preventing structural shield loops at the machine housing.
  • Magnetic Pickup Air-Gap Setting: When using magnetic pickup sensors, set the physical air gap between the sensor face and the gear tooth gear to the exact manufacturer specification to avoid signal clipping or missing pulses at low startup velocities.

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