Product Overview
The Bently Nevada 140072-04 3500/45 Position Monitor is a four-channel module engineered for precise monitoring of machinery position and displacement. It supports a wide range of sensor types, including non-contact proximity probes, rotary position transducers (RPTs), and LVDTs (both AC and DC).
Moreover, each channel can be independently configured for various functions such as axial position, differential expansion, case expansion, or valve position monitoring. This flexibility allows the 3500/45 to provide detailed insights into machine condition and performance for predictive maintenance systems.
Functional Highlights
- Flexible Input Compatibility: Supports proximity probes, LVDTs, RPTs, and rotary potentiometers.
- Multi-Function Configuration: Each channel can monitor a unique position-related parameter.
- Advanced Alarm Processing: User-programmable alarm setpoints ensure rapid fault detection.
- Paired Channel Operation: Channels can be combined for simultaneous monitoring modes.
- Status Indication: OK, TX/RX, and Bypass LEDs provide at-a-glance operational feedback.
In addition, the module conditions input signals and transmits both buffered and recorder outputs, ensuring accurate integration with plant-wide monitoring systems.
Technical Data
| Parameter | Specification |
|---|---|
| Model | 140072-04 |
| Channels | 4 independent input channels |
| Supported Sensors | Proximity probes, RPTs, AC/DC LVDTs, rotary potentiometers |
| Input Impedance | 1 MΩ (DC LVDT), 10 kΩ (Proximitor/RPT), 137 kΩ (AC LVDT), 200 kΩ (potentiometer) |
| Sensor Sensitivity | Axial: 3.94–7.87 mV/mm; Differential Expansion: 0.394–0.787 V/mm |
| Case Expansion Range | 0.05–0.22 V/mm |
| Valve Position Range | RPT: 50–140 mV/degree; Potentiometer: 41 mV/degree |
| Power Consumption | 5.6–8.5 W depending on sensor type |
| Recorder Output | +4 to +20 mA (proportional to full scale), 0–12 Vdc, 0–600 Ω load |
| Buffered Outputs | Coaxial connectors, short-circuit protected |
| LED Indicators | OK, TX/RX, Bypass |
| 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 | Up to 95%, non-condensing |
| Dimensions (H × W × D) | 241.3 × 24.4 × 241.8 mm (9.50 × 0.96 × 9.52 in) |
| Weight | 0.91 kg (2.0 lb) |
System Integration
The Bently Nevada 140072-04 3500/45 Position Monitor integrates seamlessly into Bently Nevada 3500 Series racks, supporting comprehensive condition monitoring. Therefore, it enables detailed position diagnostics for turbines, compressors, and pumps.
Typical use cases include:
- Axial Position Monitoring in steam turbines and compressors.
- Differential Expansion tracking in large rotating shafts.
- Valve Position Feedback for control system integration.
- Case Expansion Detection in thermal machinery.
Furthermore, its robust signal conditioning and flexible configuration make it suitable for both OEM installations and retrofit upgrades.
Details
| Weight | 0.91 kg |
|---|
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