Bently Nevada 167384-01 (3300/02 Enhanced Keyphasor Module) Full Product Specification

167384-01 is the part number of Bently Nevada 3300/02 enhanced Keyphasor module, a half-height rack-mounted functional module exclusively designed for 3300 series machinery protection monitoring rack system, manufactured in USA as original factory standard configuration component. This module serves as core speed and phase reference signal acquisition unit for the whole 3300 monitoring platform, receiving pulse signals from eddy current proximity probes or magnetic speed pickups installed on rotating shaft, converting raw analog trigger pulses into standardized digital Keyphasor timing signals, which are distributed to all monitoring modules inside the rack for rotating speed calculation, vibration phase analysis and 1X frequency vector measurement of rotating equipment including steam turbines, centrifugal compressors, large blowers and generator sets in power, petrochemical and metallurgy industries. Multiple 3300/02 modules can be installed in one single 3300 rack; standard rack configuration supports maximum four independent Keyphasor input channels, and paired expansion mode enables up to eight Keyphasor signal access to satisfy multi-shaft unit monitoring demands.

The module is built with dual independent Keyphasor input channels, each channel is compatible with two mainstream transducer types: standard 3300XL series eddy current proximity probe system matched with extension cables, and magnetoelectric variable reluctance speed pickups. For proximity probe input, internal circuit supplies regulated negative DC excitation power for probe operation, and automatically processes shaft notch-generated voltage pulse signals; for magnetic pickup input, the unit completes impedance matching and low-level signal amplification for alternating pulse outputs from pickup coil.Built-in programmable trigger threshold circuit allows users to set rising-edge or falling-edge trigger mode according to actual notch size and installation clearance on site, eliminating interference pulse caused by mechanical burr or shaft surface scratch. Internal high-frequency noise filtering circuit restrains industrial frequency and converter clutter to guarantee stable once-per-turn trigger output for Keyphasor timing. Processed digital Keyphasor pulse signals are transmitted via rack internal backplane bus to vibration, displacement monitor modules to support accurate rotational speed, phase angle and synchronous vibration parameter computation.

All processed Keyphasor digital signals are transmitted to every installed monitor module through 3300 rack backplane bus, providing unified timing benchmark for full rack measurement channels. Meanwhile, the module reserves external buffered Keyphasor signal terminals on rear wiring board for portable vibration analyzer and offline data collector connection, facilitating field waveform test and equipment fault diagnosis.The module supports rack bus communication with 3300 system interface module, enabling upper DCS and System 1 condition monitoring software to read real-time shaft rotating speed, channel fault state and Keyphasor trigger abnormal alarm information remotely. Every input channel integrates full self-diagnosis logic to detect probe open-circuit, short-circuit, cable disconnection and abnormal input signal amplitude, with corresponding fault flag uploaded via system bus and indicated by front panel status LED lamp.

Power supply is derived uniformly from 3300 rack internal backplane 24VDC bus power, no independent external power wiring required; typical single module power consumption is about 2.8W, rated operating current approx 0.12A under nominal input voltage. Internal excitation power for proximity probe channel ranges from -17.5VDC to -26VDC, matching standard 7.87V/mm 3300XL probe system specification. Input signal frequency response covers 0.1Hz to 25kHz, adapting low-speed heavy equipment and high-speed turbine unit rotating frequency range. Measurement precision of rotating speed referenced by Keyphasor signal is better than ±0.05% full scale under rated working condition.

As half-height standard 3300 rack module, overall outer dimension is 241mm × 24.3mm × 242mm, net weight about 0.55kg, designed for direct plug-in installation into standard 3300 rack slot with hot-swap compatible design; module can be replaced during system live operation without shutting down the whole rack power supply, minimizing maintenance outage duration. Front panel equips LED indicator for power status, channel normal and channel fault; rear side matches dedicated terminal wiring board for external sensor cable access.Continuous working ambient temperature scope: -25℃ ~ +70℃; storage temperature: -40℃ ~ +85℃; applicable relative humidity 5%~95% non-condensing, capable of stable operation in high-temperature, dust and slight oil mist industrial plant environment; the product passes CE industrial electromagnetic compatibility and safety certification, conforming to international industrial control equipment standard requirements.

Primarily configured inside Bently 3300 series rack monitoring system for large critical rotating machinery: steam turbine and generator units in thermal power plants, reciprocating and centrifugal compressors in petrochemical refining plants, large induced draft fans and rolling mill main drive units in metallurgical factories. The Keyphasor signal provided by 167384-01 serves as essential reference for unbalance, misalignment and rubbing fault diagnosis of rotating equipment, supporting both online protection interlock and offline precision vibration analysis work.

All original new 167384-01 modules complete full-channel signal test, high-low temperature aging and trigger threshold calibration before factory delivery to guarantee consistent operating performance. Standard factory warranty period is twelve months counted from delivery date; free maintenance or component replacement is available for failures resulting from inherent manufacturing defects within valid warranty under specified installation and operation environment; damage caused by wrong wiring, overvoltage impact, mechanical damage and chemical corrosion is excluded from free warranty coverage.