Product Overview
The Bently Nevada 991 Thrust Transmitter is a 2-wire, loop-powered device designed for OEMs using centrifugal air compressors, pumps, motors, or fans. It converts shaft axial displacement from a 3300 NSv proximity probe into a 4–20 mA current signal, enabling easy integration into control systems for machinery protection and diagnostics.
Key Features
-
Direct integration with 3300 NSv Proximity Probes
-
Delivers 4–20 mA signal proportional to shaft thrust
-
PROX OUT and COM terminals for vibration/gap diagnostics
-
Built-in zero/span adjustments
-
Signal defeat and power-up inhibit functions
-
Potted design suitable for 100% condensing humidity
-
DIN rail or bulkhead mounting options
Applications
-
Centrifugal air compressors
-
Small industrial pumps
-
Electric motors and cooling fans
-
Machinery requiring axial position monitoring
-
OEM skid packages
-
Areas with limited clearance or harsh environments
Advantages
-
Compact and rugged for tight installations
-
Accurate axial position monitoring with fast signal recovery
-
الدعمs portable diagnostics with dynamic output
-
Enhanced signal integrity with recommended test adapter
-
Complies with global certifications (CSA, ATEX, IECEx)
-
Maintains loop protection from faulty probe or wiring issues
Technical Specifications
| Parameter | Value |
|---|---|
| Input | 3300 NSv Proximity Probe (1 probe + extension cable) |
| Power Supply | +12 to +35 VDC |
| Output Signal | 4–20 mA |
| Loop Accuracy | ±1.5% full scale |
| Max Loop Resistance | 1000 Ω @ 35 VDC |
| Current Limiting | 23 mA typical |
| Zero/Span Adjustments | External potentiometers |
| Linear Range (Prox Out) | 0.25 to 1.65 mm (10 to 65 mils) |
| Temperature Stability | ±10% (0°C to +70°C) |
| Operating Temp (Transmitter) | -35°C to +85°C |
| Operating Temp (Probe) | -52°C to +177°C |
| Relative Humidity | 100% condensing, non-submerged |
| Case Material | AISI 303/304 Stainless Steel |
| Dimensions | 100.1 x 73.9 x 53.3 mm |
| الوزن | 0.43 kg |
FAQ
Q1: What is the main function من the 991 Thrust Transmitter?
A1: It converts axial shaft displacement into a 4–20 mA signal for machinery monitoring.
Q2: What sensor is compatible with this transmitter?
A2: It works with the Bently Nevada 3300 NSv proximity probe and matching extension cables.
Q3: Can I use this in hazardous areas?
A3: Yes, it has approvals for CSA Division 2, ATEX Zone 0/2, and IECEx.
Q4: Is the PROX OUT signal isolated?
A4: No, use the 122115-01 Test Adapter for safe connection to AC-powered test equipment.
Q5: What mounting options are available?
A5: It supports DIN-rail clips and bulkhead screws as standard.
Q6: What happens if the probe becomes disconnected?
A6: The output drops below 3.6 mA within 100 µs to avoid false alarms.
Q7: What is the linear output range?
A7: 0.25 to 1.65 mm (10 to 65 mils) for the Prox Out dynamic signal.
Q8: Can it be used for plant-wide diagnostics?
A8: No, it’s not suitable for systems like System 1. It’s intended for simpler monitoring setups.
Q9: What’s the typical leadwire distance for the Proximitor output?
A9: Up to 3 meters (10 feet) from the transmitter to the BNC diagnostic output.
Q10: What tools are recommended for testing?
A10: Use the 122115-01 Test Adapter for signal isolation and analysis with oscilloscopes.
Related الطرازs (Same Series or Compatible)
| الطراز | الوصف | Output Signal | Mounting Type | Cable Length |
|---|---|---|---|---|
| 991-06-70-01-01 | 991, 0.6 mm range, 7 m cable, DIN mount | 4–20 mA | DIN rail | 7 m |
| 991-25-50-02-05 | 991, 25 mil range, 5 m cable, bulkhead mount | 4–20 mA | Bulkhead | 5 m |
| 991-06-50-03-01 | 991, 0.6 mm range, 5 m cable, DIN + screw mount | 4–20 mA | DIN/screws | 5 m |
| 330901-00-50-01-00 | NSv Probe, 1/4-28 thread, 5 m, no armor | Voltage | Thread mount | 5 m |
| 330902-00-70-01-00 | NSv Probe, 1/4-28 thread, 7 m, with armor | Voltage | Thread mount | 7 m |
| 122115-01 | Test Adapter for PROX OUT signal isolation | — | Portable | — |
Popular Bently Nevada الطرازs
| الطراز | الوصف | Function | Signal Type | Dimensions (mm) | الوزن |
|---|---|---|---|---|---|
| 3500/42M | Proximitor Seismic Monitor | Vibration Monitoring | Dynamic | 241 x 24 x 99 | 0.5 kg |
| 3500/22M | Transient Data Interface Module | Data Interface | Digital | 241 x 24 x 99 | 0.4 kg |
| 3500/25 | Keyphasor Module | Speed and Phase Monitoring | Digital | 241 x 24 x 99 | 0.45 kg |
| 3500/15 | Power Supply Module | Power Conversion | — | 241 x 24 x 99 | 0.6 kg |
| 3500/32M | 4-Channel Relay Module | Relay Control | Relay | 241 x 24 x 99 | 0.45 kg |
| 330104-00-10-10-02 | 3300 XL 8mm Proximity Probe | Shaft Vibration Measurement | Voltage | 90.4 x 8 x 8 (tip) | 0.3 kg |
معلومات الشركة
E-mail: [email protected]
Mobile：يرجى الاتصال عبر البريد الإلكتروني
Whatsapp：يرجى الاتصال عبر البريد الإلكتروني
Add: مبنع أليشان، 2 طريق لفلينج، منطقة سيمينغ، شيامن، فوجيان، الصين، 361006
خدماتنا
نحن متخصصون في توفير قطع الأتمتة الصناعية مع ضمان لمدة عام واحد. قطع الأتمتة الصناعية لدينا تباع في جميع أنحاء العالم.
يمكننا توفير المعدات وقطع الغيار من مختلف البلدان والشركات المصنعة، وحل مخاوفكم أو مشاكل الجودة في أماكن متعددة، مع ميزة سعرية كبيرة.
نرحب باتصالك للحصول على مزيد من التفاصيل حول المنتجات.
