Product Brief: 3500/15-03-02-00 - TMR (Triple Modular Redundant) Power Supply Module Backplane
The 3500/15-03-02-00 is a specialized TMR (Triple Modular Redundant) Backplane Assembly for the Bently Nevada 3500 Machinery Protection System. This variant is specifically designed to integrate both monitoring module redundancy and power supply redundancy in a single, high-availability chassis. It provides a fully fault-tolerant platform by accommodating three identical monitoring modules alongside two redundant power supply modules. This configuration is engineered for the most critical applications where any single point of failure in monitoring logic or power delivery must be eliminated.
Primary Application Scenarios:
High-Availability & Fault-Tolerant Systems: In nuclear power plants, offshore platforms, or unmanned facilities where system reliability is non-negotiable and maintenance windows are extremely limited.
Critical Safety Instrumented Systems (SIS): Serving as the hardware platform for machinery protection functions requiring SIL 2 / SIL 3 certification (per IEC 61508/61511), where both sensor/processing channels and power sources must be redundant.
Large Steam & Gas Turbine Protections: Hosting TMR vibration, speed, and differential expansion monitors for major power generation assets where a false trip or failure to trip carries massive financial or safety risk.
LNG Trains & Critical Refinery Compressors: Protecting extremely high-value, single-train processes where unplanned shutdowns result in catastrophic production loss.
Aeroderivative & Heavy-Duty Gas Turbines: Ensuring continuous protection for prime movers in pipeline compression and peaking power plants.
Key Parameters & Specifications:
| Parameter Category | Specification Details |
|---|---|
| Core Function | Integrated TMR Backplane for three monitoring modules and two redundant power supplies. It manages module synchronization, hardware voting on monitor outputs, and automatic power supply switchover. |
| Part Number | 3500/15-03-02-00 (This part number typically denotes a complete chassis assembly with the specific slot configuration: 3 for TMR modules + 2 for power supplies). |
| Key Features | - Triple Modular Redundancy (TMR): For three monitoring modules (e.g., 3500/25, 3500/92). - Dual Redundant Power Supplies: Accommodates two 3500/05 or 3500/05M power supply modules. - Integrated Voting Logic: Hardware-based voting on alarm and 4-20mA outputs from the three monitoring channels. - Automatic Power Supply Switchover: Seamless transition to the backup supply in case of a primary power supply failure. - Complete Chassis Assembly: Includes backplane, card guides, connectors, and mounting hardware. |
| Physical Dimensions (Full Assembly) | Height: 318 mm (12.5 in) - Standard 3500 rack height Width: Approximately 95 mm (3.75 in). This occupies 5 slots in a standard 3500 rack frame (3 for monitors + 2 for power supplies). Depth: 206 mm (8.1 in) |
| Weight (Approximate, Empty) | Assembly: ~2.7 kg (6.0 lbs) (Weight increases significantly when fully populated with modules and power supplies). |
| Compatible Monitoring Modules | Requires three identical TMR-Capable 3500 series monitoring modules. |
| Required Power Supply Modules | Requires two 3500/05 or 3500/05M Power Supply Modules. |
| Operating Environment | Temperature: 0°C to +65°C (+32°F to +149°F) Humidity: 5% to 95% RH, non-condensing. Designed for harsh industrial environments. |
| Safety & Compliance | The TMR architecture, when properly configured with qualified modules and software, is designed to support Safety Integrity Level (SIL) 2/3 applications as part of a certified Safety Instrumented System (SIS). |
Critical Configuration Note: The 3500/15-03-02-00 is a complete, pre-configured hardware assembly. Its functionality and safety ratings are entirely dependent on being populated with the correct three TMR monitoring modules, two qualified power supplies, and programmed with the appropriate voting and trip logic using the 3500 Configuration Software. Always consult the official Bently Nevada (Baker Hughes) 3500 Framework Hardware Installation Manual and relevant Safety Manuals for definitive specifications and SIL implementation guidelines.
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