Description
Bently Nevada 3500/45-02-00
Technical Specifications:
- Module Type: Full-height, 4-channel position monitor
- Power Consumption: Approximately 7.7 watts typical
- Sensor Power Supply (Proximitor/RPT): -24V DC
- Sensor Power Supply (DC LVDT): +15V DC
- Sensor Power Supply (AC LVDT): 2.3 Vrms at 3400 Hz sine wave
- Sensor Power Supply (Rotary Potentiometer): -12.38V DC
- Operating Temperature: -30°C to +65°C (-22°F to +150°F)
- Storage Temperature: -40°C to +85°C (-40°F to +185°F)
- Humidity: 95% non-condensing
- Agency Approval: None
- Dimensions (H × W × D): 241.3 mm × 24.4 mm × 241.8 mm (9.50 in × 0.96 in × 9.52 in)
- Weight: 0.91 kg (2.0 lbs)
Functional Features:
- 4-channel position monitor accepting proximity, RPT, DC LVDT, AC LVDT, and rotary potentiometer inputs
- Programmable measurement functions include: axial (thrust) position, differential expansion (standard single ramp, non-standard single ramp, dual ramp, complementary), case expansion, and valve position
- Channels are programmed in pairs — Channels 1&2 perform one function, Channels 3&4 perform another (or the same) function
- Only Channels 3&4 can perform case expansion monitoring
- Continuously compares current machine position with programmed alarm setpoints to drive alarms
- Alarm setpoints configured via 3500 Rack Configuration Software
- Alert and Danger setpoints programmable for each effective proportional value
- Front panel LEDs: OK, TX/RX, and Bypass indicators
- Ships unconfigured from factory — can be configured for multiple different applications
Application Scenarios:
- Steam turbine axial displacement (thrust) monitoring
- Differential expansion monitoring between rotor and casing
- Case expansion monitoring for large turbines
- Valve position monitoring
- Power generation, petrochemical, and metallurgical industries
Performance Parameters:
- Channel count: 4 channels per module (programmed in pairs)
- Sensitivity (Axial Position): 3.937 mV/mm (100 mV/mil) or 7.874 mV/mm (200 mV/mil)
- Sensitivity (Differential Expansion): 0.394 V/mm (10 mV/mil) or 0.787 V/mm (20 mV/mil)
- Sensitivity (Ramp Differential Expansion): 0.394 V/mm to 7.874 V/mm depending on configuration
- Sensitivity (DC LVDT Case Expansion): 0.05 V/mm to 0.22 V/mm depending on configuration
- Sensitivity (AC LVDT Case Expansion): 28.74 mV/V/mm to 9.45 mV/V/mm depending on configuration
Material Composition:
- High-reliability electronic components on multi-layer PCB
- Metal module enclosure with conformal coating
- Gold-plated backplane edge connectors
Structural Features:
- Full-height module form factor
- Front panel with OK, TX/RX, and Bypass LED indicators
- Rear I/O module (135145-01) with external terminal connections for field wiring
- Plug-in design compatible with any accessible rack slot
Working Principle:
The 3500/45-02-00 receives analog signals from position sensors (proximity probes, RPT, DC LVDT, AC LVDT, or rotary potentiometers) via the external I/O module. It conditions the input signals, performs the programmed position measurement function, compares the measured values against user-programmable alarm setpoints (Alert and Danger), and drives alarm outputs when setpoints are exceeded.
