Description
Bently 3500/45‑01‑00 140734‑04
Technical Specifications Number of input channels: 4 independent configurable channels Supported transducer: proximitor probe, DC LVDT, AC LVDT, rotary potentiometer, RPT position transducer Input signal range: ‑10 Vdc ~ +10 Vdc Input impedance: 1 MΩ for DC LVDT; 10 kΩ for proximitor; 137 kΩ for AC LVDT; 200 kΩ for potentiometer Measurement accuracy: ±0.5% full scale Power consumption: 8.5 W typical value, maximum 10.5 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: 0.6 kg Compliance standard: API‑670, CE certification
Functional Features Four independent channels support different position‑transducer types respectively. Multi‑type signal conditioning circuit adapts to various position‑sensor output characteristics. Dual‑level programmable Alert and Danger alarm setpoints, configurable alarm hysteresis and delay time. Front‑panel LED indicators display channel health status, alarm trigger status and module running state. Buffered raw transducer signal output for external diagnostic instrument access. Supports simplex, dual redundant and TMR triple modular redundant working modes. All measurement parameters and alarm thresholds downloaded by 3500 configuration software. Upload real‑time position trend data to System‑1 machinery diagnostic software. Output alarm logic to 3500 series relay modules for machinery trip protection. External termination version adopts rear terminal‑block wiring without internal safety barrier circuit. Hot‑swap supported under normal rack power supply.
Application Scenarios Axial thrust displacement monitoring for steam turbine and gas turbine units. Rotor‑casing differential expansion measurement for large turbine equipment. Valve position feedback monitoring for steam governing valve. Casing thermal expansion monitoring for turbo‑generator set. Position measurement for large centrifugal compressors. Position monitoring for power plant and petrochemical non‑hazardous‑area rotating machinery. Installed inside 3500 rack cooperating with communication, relay and redundant power modules.
Performance Parameters Sampling rate: 256 samples per channel continuous sampling Alarm response delay: less than 300 ms Measurement resolution: 0.1 μm for displacement measurement Channel‑to‑channel crosstalk: less than 0.1% full scale MTBF value: more than 360000 hours under normal industrial environment
Material Composition Front panel: blue coated metal panel with silk‑screen text and LED indicator window. Main circuit board: multi‑layer FR‑4 high‑temperature resistant printed circuit board. Electronic components: multi‑channel signal conditioning chips, high‑precision ADC, FPGA digital processing unit. Module housing: aluminum alloy electromagnetic shielding shell. Locking mechanism: stainless steel rack insertion latches. Connector: gold‑plated backplane connector and gold‑plated external termination terminal block.
Structural Features Standard single‑slot plug‑in module for 3500 instrument rack. Front‑panel LED status indicator group and pull‑out latch mechanism. Rear gold‑plated multi‑pin backplane connector for power supply and system bus communication. External termination version leads all sensor signal wiring to rear terminal block, no internal barrier circuit. Internal metal shielding shell isolates different signal‑processing zones. Circuit layout divides signal conditioning area and digital logic area.
Working Principle Position‑transducer analog signal enters corresponding channel signal conditioning circuit. High‑precision ADC converts analog signal into digital quantity. FPGA and MCU unit complete digital filtering, linear correction and engineering‑value conversion according to configured transducer type and sensitivity. Measured position value compares with pre‑programmed Alert and Danger alarm setpoints. When measurement exceeds threshold, alarm flag is generated and transmitted to system bus and relay module. Real‑time position data is uploaded through rack backplane bus to rack interface module for upper‑level configuration and diagnostic software access. Buffered raw analog signal is output for external diagnostic equipment.
Installation Requirements Insert module into designated slot of 3500 standard instrument rack, tighten front‑panel latches for reliable backplane connector contact. Connect different kinds of position‑sensor cables to rear external‑termination terminal block strictly following terminal definition. Must cooperate with 3500/20 rack interface module for parameter configuration download. Ensure rack redundant power supply works normally. Maintain 20 mm ventilation clearance above and below rack cabinet. Sensor signal cable shall keep more than 30 cm distance from high‑power power cable to reduce electromagnetic interference. Complete channel‑type and parameter configuration by 3500 configuration software after hardware installation. Verify channel OK LED indicator light after power‑on.
