Email: sales@slxytech.com
WhatsApp / Wechat：8617062388866
Phone：+86 17062388866Description
The Bently Nevada 3500/15 is a Triple Modular Redundant (TMR) Proximity Transducer System engineered for mission-critical machinery protection in high-risk industrial applications. As part of Emerson’s flagship 3500 series, this safety-certified module continuously monitors shaft radial vibration, axial position, and speed using three independent measurement channels. The 3500/15 employs hardware-based voting logic to eliminate single points of failure, achieving SIL 3 (IEC 61508) and API 670 compliance for turbines, compressors, and other high-value rotating assets. Its robust design processes signals from eddy-current probes while performing real-time diagnostics for sensor integrity, cable faults, and module health. With <5ms>
Bently Nevada 3500/15
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | Bently Nevada 3500/15 |
| Manufacturer | Emerson (Bently Nevada) |
| Product Type | TMR Vibration/Position Monitor |
| Channels | 4 probe inputs (expandable to 8) |
| Redundancy | Triple Modular Redundant (TMR) |
| Input Compatibility | 5 mm/8 mm Eddy Probes (-7.87 V/mil sensitivity) |
| Measurement Range | 0–500 µm pk-pk (vibration), ±2.5 mm (position) |
| Accuracy | ±1% full scale |
| Frequency Response | 0.5 Hz–12 kHz (±3 dB) |
| Alarm Relays | 3 per channel (Danger/Alert/Danger Bypass) |
| Response Time | <5> |
| Safety Certification | SIL 3 (IEC 61508), PLe (ISO 13849) |
| Power Supply | 24 VDC ±10% (9W max) |
| Operating Temperature | -40°C to +85°C (-40°F to +185°F) |
| Compliance | API 670 5th Ed., ISO 13373 |
| Hazardous Approvals | ATEX, IECEx Zone 2 |
| Communication | RS-485 Modbus, Ethernet (via 3500/92 gateway) |
Main Features and Advantages
Ultra-High Reliability: TMR architecture cross-checks three independent signal paths, achieving >99.99% dangerous failure avoidance. Hardware-based voting ensures valid trip decisions even with two channel failures. Automatic sensor validation detects probe degradation before false trips occur.
Safety Integration: SIL 3/PLe certification supports safety instrumented systems (SIS) for turbine overspeed, compressor surge, and boiler protection. Configurable permissive start logic prevents equipment operation with critical faults.
Advanced Diagnostics: Continuous monitoring of probe gap voltage, cable impedance, and module health. Dynamic waveform capture (via 3500/22M module) records transient events during startups/shutdowns.
Application Field
The 3500/15 is indispensable in zero-failure-tolerance environments:
Power Generation: Turbine supervisory systems (TSI) for 300+ MW steam turbines and hydrogen-cooled generators
Oil & Gas: Gas compressor surge protection in offshore platforms and LNG liquefaction trains
Petrochemical: Critical pump train monitoring in ethylene crackers and refinery FCC units
Marine: Propulsion engine protection on DNV/ABS-classed vessels
Nuclear: Reactor coolant pump vibration monitoring (NRC-compliant installations)
Bently Nevada 3500/15
Related Products
Bently Nevada 3300 XL 8mm Probes: Eddy-current sensors for shaft measurement
Bently Nevada 3500/22M: Transient Data Interface for startup/shutdown analysis
Bently Nevada 3500/92: OPC Gateway for System 1® integration
Bently Nevada 3500/32: TMR Speed Monitor (paired for overspeed protection)
Bently Nevada TK-4E Pro: Calibration test kit
Bently Nevada 1900/65A Proximitor®: Signal conditioner for remote mounts
Bently Nevada 3500/15-01: Expanded 8-channel variant
Bently Nevada 176449-01: Explosion-proof junction box
