Description
Bently 3500/45‑01‑00 176449‑04
Technical Specifications Number of input channels: 4 independent configurable channels Supported transducer: explosion‑proof certified 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: 10 W typical value, maximum 12 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: 1.08 kg Compliance standard: API‑670, CE, ATEX intrinsic safety certification
Functional Features Four independent channels can be configured for different position‑transducer types. Built‑in intrinsic safety barrier circuit limits loop voltage and current for hazardous‑area field sensors. Multi‑type signal‑conditioning circuit adapts output characteristics of various position transducers. Dual‑level programmable Alert and Danger alarm setpoints, adjustable alarm hysteresis and delay time. Front‑panel LED indicators show channel health status, alarm trigger and module running condition. Buffered raw transducer signal output for external fault‑diagnosis instruments. Supports simplex, dual redundant and TMR triple‑modular‑redundant operation modes. All configuration parameters downloaded from 3500 configuration software. Upload real‑time position trend data to System‑1 condition‑monitoring software. Drive 3500 series relay modules to realize machinery trip‑protection function. Hot‑swap supported under normal rack power supply.
Application Scenarios Axial thrust displacement monitoring for explosion‑proof‑zone steam turbine and gas turbine units. Rotor‑casing differential expansion measurement for petrochemical hazardous‑area large turbine. Governing valve position feedback monitoring for explosion‑proof turbine equipment. Casing thermal expansion monitoring for offshore‑platform turbo‑generator set. Position measurement for hazardous‑area centrifugal compressors. Position monitoring for oil‑refinery and coal‑chemical rotating machinery. Cooperate with 3500 rack communication module, relay module and redundant power‑supply module.
Performance Parameters Intrinsic safety barrier maximum output voltage: ‑28 Vdc Intrinsic safety barrier maximum short‑circuit current: 12 mA 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 330000 hours under normal industrial environment
Material Composition Front panel: blue coated metal panel with silk‑screen marking and LED indicator window. Main circuit board: multi‑layer FR‑4 high‑temperature resistant printed circuit board. Safety‑barrier components: intrinsic safety resistors, zener diodes and isolation components. Signal‑processing parts: multi‑channel conditioning chips, high‑precision ADC, FPGA digital‑processing unit. Module housing: aluminum alloy electromagnetic shielding shell. Locking device: stainless steel rack insertion latches. Connector: gold‑plated backplane connector and internal‑barrier signal connector.
Structural Features Standard single‑slot plug‑in module for 3500 instrument rack. Front‑panel LED indicator group and pull‑out latch mechanism. Rear gold‑plated multi‑pin connector connects rack backplane for power and system‑bus communication. Internal integrated intrinsic‑safety‑barrier circuit between input connector and multi‑type signal‑conditioning circuit. Metal shielding shell separates hazardous‑side circuit, analog‑signal‑processing zone and digital‑logic zone. Circuit layout divides different transducer signal‑processing paths.
Working Principle Field position‑transducer analog signal passes through built‑in intrinsic‑safety‑barrier circuit first to limit voltage and current for hazardous‑area loop. Protected analog signal enters multi‑type signal‑conditioning circuit and high‑precision ADC converter. FPGA and MCU unit implement digital filtering, linear correction and engineering‑value conversion according to configured transducer type and sensitivity. Measured position value compares with programmed Alert and Danger alarm thresholds. Alarm flag will be generated once threshold is exceeded 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 diagnostic‑software access. Buffered raw analog signal is output for external‑diagnosis equipment.
Installation Requirements Insert module into designated slot inside 3500 instrument rack, tighten front‑panel latches to guarantee reliable backplane‑connector contact. Hazardous‑area position‑sensor signal connects to internal‑barrier circuit inside rack cabinet, external safety‑barrier isolator is not required. Must cooperate with 3500/20 rack‑interface module for parameter‑configuration download. Rack redundant‑power‑supply shall keep normal operation. Maintain 20 mm ventilation gap above and below rack cabinet. Field wiring for hazardous‑area sensors must comply with ATEX intrinsic‑safety installation standard. Separate sensor‑signal cable from high‑power power‑cable to reduce electromagnetic interference. Complete channel‑type and parameter‑configuration by 3500 configuration software after hardware installation. Confirm channel OK LED‑indicator light after power‑on.
