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Description
Product Overview
The Bently Nevada 3500/65 145988-02/02D is a Triple Modular Redundant (TMR) Relay Module engineered for ultra-reliable safety shutdowns in mission-critical industrial installations. Part of Bently Nevada’s 3500 Series machinery protection system, this module provides redundant relay outputs for emergency shutdown (ESD) and fire & gas systems in power generation, oil & gas, and chemical processing plants. The Bently Nevada 3500/65 145988-02/02D features three independent voting circuits to achieve SIL 3 certification per IEC 61508/61511, ensuring fail-safe operation even during component failures.
Designed for integration with 3500 Series racks, the Bently Nevada 3500/65 145988-02/02D processes inputs from vibration monitors, temperature sensors, or pressure transmitters to execute voting logic for shutdown commands. Its galvanic isolation, fault-tolerant architecture, and hot-swappable design minimize downtime during maintenance. With a ruggedized construction tested to MIL-STD-810G standards, this module operates reliably in extreme temperatures (-40°C to +70°C) and high-vibration environments like turbine halls or offshore platforms.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | Bently Nevada 3500/65 145988-02/02D |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Type | TMR Relay Module |
| Relay Outputs | 6 Form C (SPDT), 5 A @ 250 VAC/30 VDC |
| Input Compatibility | 3500 Series monitoring modules (e.g., 3500/42M, 3500/44M) |
| Redundancy | Triple Modular Redundant (TMR) voting |
| Response Time | < 15 ms (per channel) |
| Power Supply | 24 VDC ±10%, 2.5 W (max) |
| Isolation Voltage | 1500 VAC (channel-to-channel) |
| Operating Temperature | -40°C to +70°C |
| Certifications | SIL 3, ATEX/IECEx Zone 2, API 670 |
| Communication | Via 3500/92M Gateway for System 1® integration |
| Dimensions | 324 mm x 40 mm x 157 mm (rack-mounted) |
| Weight | 1.7 kg |
145988-02
Key Functional Features
The Bently Nevada 3500/65 145988-02/02D combines redundancy and intelligence for unparalleled safety:
- TMR Voting Logic: Three independent processors execute “2-out-of-3” voting, eliminating single points of failure.
- Dynamic Self-Testing: Continuously verifies relay contact health and coil integrity, generating alerts for welded contacts or open circuits.
- Configurable Logic: Uses 3500 Rack Configuration Software to program shutdown thresholds, delay timers, and latch/reset behaviors.
- Cross-Channel Diagnostics: Detects discrepancies between redundant circuits and initiates safe states during mismatches.
For integration flexibility, the module synchronizes with 3500/92M communication gateways to stream diagnostics to Bently Nevada’s System 1® analytics platform, enabling predictive maintenance.
Application Scenarios
The Bently Nevada 3500/65 145988-02/02D is pivotal in safety-critical systems:
- Gas Turbine Protection: Triggers fuel valve shutdowns during excessive vibration or bearing temperature faults.
- Offshore Compression Stations: Initiates emergency stops for reciprocating compressors upon detected gas leaks.
- Nuclear Power Plants: Safeguards reactor coolant pumps using SIL 3-certified voting logic.
- Pipeline ESD Systems: Activates block valves in response to overpressure or rupture detection signals.
- Hydroelectric Plants: Coordinates emergency dewatering sequences for turbine overspeed events.
Related Products
- Bently Nevada 3500/92M: Communication gateway for System 1® integration.
- 3500/42M Proximitor® Module: Conditions signals from eddy current probes.
- Bently Nevada 3300 XL 8 mm Probes: Vibration sensors for machinery monitoring.
- System 1® Health Monitoring Software: Centralized analytics platform.
- 3500/15 Redundant Power Supply: Ensures continuous module operation.
Product Assurance
Bently Nevada guarantees the Bently Nevada 3500/65 145988-02/02D with a 5-year warranty, supported by ISO 9001-certified manufacturing and HALT (Highly Accelerated Life Testing) validation. Each unit undergoes 500+ hours of operational testing under simulated load, vibration, and thermal cycling. Global customers receive 24/7 technical support via Bently Nevada’s Machinery Health™ Centers, with on-site service available within 48 hours. Compliance with API 670, IEC 61508, and ISO 13849-1 ensures adherence to global machine safety and functional safety standards.
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