1. Core Technical Specifications

Module Type：3500/25 Enhanced Dual-Channel Keyphasor Timing Module

System Compatibility：Bently Nevada 3500 series full rack machinery protection system

Module Structure：Half-height compact slot design for flexible rack layout

Channel Configuration：2 independent Keyphasor transducer input channels

Core Function：Rotational speed measurement, phase reference positioning, system timing synchronization

Trigger Amplitude：500 mV peak-to-peak standard trigger threshold

Hysteresis Range：User configurable 0.2V–2.5V threshold hysteresis

Signal Output：Dual front coaxial buffered outputs + dual rear terminal buffered outputs

Output Load Capacity：-24VDC, 40mA maximum single-channel load

Output Impedance：504Ω standard buffered output impedance

Status Indication：Independent OK fault indicator and TX/RX communication LED

Operating Temperature：-20℃ ~ +70℃ industrial working range

Storage Temperature：-40℃ ~ +85℃

Reliability：MTBF over 100,000 hours for long-term stable operation

Certification：Class I Div 2, CSA, ATEX, IECEx hazardous area compliance

2. Official Ordering Selection & Front/Rear Board Matching

Standard Ordering Model：3500/25-AA-BB-CC

AA Code: Input Signal Mode

BB Code: Timing Precision Grade

CC Code: Safety Certification Grade

Front & Rear Board Official Matching List

3. Core Product Advantages

The 3500/25 occupies an irreplaceable core timing position in the 3500 system, solving the industry pain point of inaccurate phase reference and asynchronous data collection in traditional machinery monitoring systems. Adopting a half-height compact design, it saves valuable rack slot space compared with full-height modules, supporting flexible stacking installation and enabling a single rack to accommodate up to four Keyphasor signal channels via dual-module deployment. The module features high-precision timing resolution and customizable hysteresis threshold parameters, effectively filtering jitter signals and mis-triggering interference caused by on-site electromagnetic noise, ensuring stable and accurate once-per-revolution reference signal output. Dual front and rear multi-channel buffered signal outputs meet diversified debugging, testing and system linkage needs, facilitating real-time signal observation and secondary signal expansion for engineers. With ultra-long MTBF reliability and wide temperature adaptability, it supports 7×24-hour uninterrupted operation, providing consistent and reliable synchronous benchmark data for long-term equipment condition trending and professional fault spectrum analysis.

4. Industrial Application Scenarios

As a dedicated timing synchronization module, the 3500/25 is widely deployed in high-precision rotating machinery monitoring systems across power, petrochemical, metallurgical and energy industries. In thermal power plant steam turbine TSI systems, it provides core phase reference and speed signals for rotor vibration analysis, thermal expansion judgment and dynamic balancing correction, supporting accurate positioning of faults such as rotor imbalance and shaft misalignment. In petrochemical high-speed centrifugal compressors and gas pressurization units, the module synchronizes multi-point vibration and displacement data, realizing precise frequency-domain analysis and early warning of mechanical fatigue faults. It is also an essential core component for industrial large fans, pumps and turbo-generator sets’ predictive maintenance systems, providing unified timing benchmark support for full-system data acquisition, greatly improving the accuracy and professionalism of equipment health diagnosis.