BENTLY 3500/44-01-00 high-performance thrust position & differential expansion monitoring module

BENTLY 3500/44-01-00 is a high-performance thrust position & differential expansion monitoring module developed by Bently Nevada (now part of Baker Hughes, a GE company). As a core component of the 3500 Series Rotating Machinery Protection & Monitoring System, it is specifically engineered to measure two critical parameters of large rotating equipment (e.g., steam turbines, gas turbines, and generators): rotor thrust position (to prevent rotor-stator rubs) and differential expansion (to avoid thermal stress-induced damage). Its real-time monitoring and safety interlock functions are essential for preventing catastrophic equipment failures and ensuring long-term operational reliability. Below is its comprehensive detailed information:

I. Core Technical Parameters

Category	Specific Specifications
Applicable System	Bently Nevada 3500 Series Rotating Machinery Protection & Monitoring System; fully compatible with 3500/10 (single-frame) and 3500/20 (multi-frame) system frames
Model Decoding	- 3500/44: Base model (thrust position & differential expansion monitoring module)- 01: Channel configuration (2 independent monitoring channels: 1 for thrust position, 1 for differential expansion)- 00: Optional features (standard industrial version, no hazardous area certification or extended functions)
Input Compatibility	- Primary sensor: Bently 3300/3500 Series eddy current displacement probes (e.g., 3300 XL 8mm, 3500 5mm high-temperature probes)- Input signal: Differential eddy current signals (0-5V peak-to-peak, microvolt-level raw signals)- Input impedance: ≥10MΩ (avoids loading sensor outputs and distorting weak signals)
Measurement Capabilities		Thrust Position	Differential Expansion
	- Measurement range: 0-5000μm (0-5mm, customizable via software)	- Measurement range: 0-10,000μm (0-10mm, customizable via software)
	- Accuracy: ±0.1% FS (full scale)	- Accuracy: ±0.1% FS
	- Resolution: 0.1μm (enables detection of tiny position changes)	- Resolution: 0.1μm
	- Update rate: 100ms per reading (real-time tracking of dynamic changes)	- Update rate: 100ms per reading
Alarm & Interlock Outputs	- Relay outputs: 2 Form C (changeover) relays per channel (total 4 relays); contact rating: 5A/250V AC, 2A/30V DC- Alarm levels: 2 programmable thresholds per parameter (Warning, Danger), e.g., "Thrust Position Warning: 2000μm, Danger: 2500μm"- Alarm delay: 0-60s adjustable (prevents false alarms from transient fluctuations)
Power Requirements	- Supply voltage: 24V DC (from 3500 system backplane, ±10% tolerance)- Power consumption: Typical 4W, maximum 6W (no external power needed for sensor excitation)
Environmental Adaptability	- Operating temperature: -40°C ~ +70°C (suitable for turbine rooms, refineries, and other harsh industrial environments)- Storage temperature: -55°C ~ +85°C- Relative humidity: 5% ~ 95% (non-condensing)- Vibration resistance: 5g (5-500Hz, IEC 60068-2-6)- Shock resistance: 50g (11ms half-sine wave, IEC 60068-2-27)
Mechanical Specifications	- Dimensions (W×H×D): 101.6mm × 152.4mm × 203.2mm (matches 3500 system frame mounting slots)- Weight: Approximately 0.8kg- Mounting: Backplane-mounted (integrated with 3500 frame; no external wiring for power or backplane communication)