Description
Bently 3500/40M‑01‑00 176449‑01
Technical Specifications Number of input channels: 4 independent channels Compatible transducer: 3300XL 5‑meter and 9‑meter proximitor systems Transducer power supply: ‑17.5 Vdc to ‑26 Vdc Measurement sensitivity: 7.87 V/mm default for 8mm probe system Frequency response range: 0 Hz to 10000 Hz Measurement accuracy: ±0.5% full scale Power consumption: 3.2 W typical value, maximum 7 W Operating temperature: ‑40 ℃ ~ +70 ℃ Storage temperature: ‑40 ℃ ~ +85 ℃ Relative humidity: 5%‑95% RH, non‑condensing Shock resistance: 50 g peak value Vibration resistance: 10‑2000 Hz, 10 g peak value Backplane communication: 3500 proprietary system bus Module dimension: 241.3 mm × 24.4 mm × 241.8 mm Weight: 0.91 kg Compliance standard: API‑670, CE certification
Functional Features Supports four independent measurement channels, each channel can be configured for different measurement parameters. Real‑time signal conditioning converts proximitor voltage signal into engineering value. Dual‑level programmable alarm setpoints including Alert and Danger, configurable alarm hysteresis and delay time. Front‑panel LED indicator shows channel health status, alarm trigger status and module running status. Buffered raw transducer signal output for external fault diagnosis instrument access. Supports simplex, dual redundant and TMR triple modular redundant working modes. All measurement parameters and alarm thresholds are downloaded via 3500 configuration software. Upload real‑time data to System‑1 diagnostic software for machinery trend analysis. Output alarm logic to 3500 series relay modules to realize machine trip protection. External termination version adopts rear terminal block connection without internal safety barrier circuit. Complete hot‑swap support under system running status.
Application Scenarios Radial shaft vibration monitoring for steam turbine and gas turbine units. Axial thrust displacement protection for centrifugal compressors. Rotor eccentricity measurement for large rotating equipment. Differential expansion monitoring of turbine rotor and casing. Machinery protection system for power plant, petrochemical and coal‑chemical industries. Signal acquisition for large fans, water pumps and turbo‑generators. Integration into 3500 rack together with communication, relay and power modules.
Performance Parameters Input impedance for proximitor signal: 550 Ω Sampling rate: continuous 256 samples per channel, transient sampling up to 12800 samples per second Alarm response delay: less than 200 ms Measurement resolution: 0.1 μm Signal output range: ‑1 Vdc ~ ‑17 Vdc Channel‑to‑channel crosstalk: less than 0.1% full scale MTBF value: more than 350000 hours under normal industrial environment
Material Composition Front panel: printed circuit board assembly with blue coated metal panel, silk‑screen marking. Main circuit board: multi‑layer FR‑4 high‑temperature resistant printed circuit board. Electronic components: industrial grade resistors, capacitors, high‑precision ADC chips and signal processing IC. Module housing: aluminum alloy die‑casting shielding shell. Locking mechanism: stainless steel draw‑pull latches for rack insertion. Connector: gold‑plated rear backplane connector, gold‑plated external termination terminal block.
Structural Features Standard 3500 rack single‑slot width plug‑in module structure. Front panel equipped with status LED indicator group and module pull‑out latch. Rear side adopts gold‑plated multi‑pin backplane connector for power supply and system bus communication. External termination version leads sensor signal to rear terminal block instead of internal barrier circuit. Internal metal shielding shell isolates electromagnetic interference between different circuit zones. Internal circuit layout separates analog signal area and digital bus area.
Working Principle The proximitor sends conditioned eddy‑current gap voltage signal into module input channel. High‑precision analog‑to‑digital converter converts analog voltage into digital quantity. FPGA and MCU unit completes digital filtering, linear correction and engineering value conversion according to configured transducer sensitivity. Measured value compares with pre‑programmed Alert and Danger setpoints. When measurement exceeds threshold, alarm flag is generated and transmitted to system bus and relay module. Real‑time measurement data is uploaded via backplane bus to rack interface module for upper software access. Buffered raw analog signal is output for external oscilloscope or diagnostic device.
Installation Requirements Insert the module into designated slot of 3500 standard instrument rack. Tighten front‑panel latches to guarantee reliable backplane connector contact. External termination wiring connects proximitor signal cables to rear terminal block strictly following terminal definition. Must cooperate with 3500/20 rack interface module for system configuration download. Ensure rack redundant power supply works normally. Keep 20 mm minimum ventilation clearance above and below rack. Signal cable shall be separated from high‑power power cable, maintain more than 30 cm distance to avoid electromagnetic interference. Complete module configuration via 3500 configuration software after hardware installation. Verify channel status LED shows OK status after power‑on.
Usage Notes Do not plug or pull out module when rack power is cut off abnormally; support hot‑swap under normal rack power supply. Do not apply over‑voltage to transducer input channel, over‑voltage will damage internal signal conditioning circuit. All sensor wiring must strictly match configured transducer sensitivity and total electrical length. Avoid strong vibration and mechanical impact on module during operation. Do not open aluminum shielding housing without authorization, internal calibration parameters will be lost. Keep rack cabinet temperature within specified operating range, dust accumulation shall be cleaned periodically. Regularly check rear terminal block tightening torque to prevent loose wiring. Calibrate measurement channel according to site maintenance cycle.
