Product Introduction: 3500/93-02-00-00-00 135813-01
The 3500/93-02-00-00-00 135813-01 is a specific hardware version of the Voting Module for the Bently Nevada 3500 Machinery Protection System. This module is a critical logic-solving component designed for high-integrity safety systems. It processes trip signals from multiple monitoring channels (e.g., from two or three vibration or speed sensors) and applies a user-configured voting logic, such as "2-out-of-3" (2oo3), to determine if a machine shutdown should be initiated. This prevents a single sensor or channel failure from causing a unnecessary (nuisance) trip of critical machinery, while still ensuring a safe shutdown if a genuine fault is confirmed by multiple channels.
Technical Parameters
The key technical specifications for the 3500/93-02-00-00-00 135813-01 module are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 3500/93-02-00-00-00 135813-01 |
| System | Bently Nevada 3500 |
| Module Type | Voting Module (2oo3, 2oo2, 1oo2, etc.) |
| Dimensions (H x W x D) | 190 mm x 55 mm x 120 mm (Standard 3500 Rack Slot) |
| Weight | 0.50 kg |
| Primary Function | Applies configurable logic to trip signals for nuisance trip prevention |
| Input Channels | Configurable for multiple trip input signals (e.g., from other 3500 monitor modules) |
| Voting Logic | User-selectable (e.g., 1oo2, 2oo2, 2oo3) |
| Output | Drives a relay in a 3500/94 Relay Module or provides a logic output to the TMR system |
| Power Supply | Powered by the 3500 Rack; +24 VDC from the rack's power supply |
| Operating Temperature | -20°C to +65°C |
Application Scenarios
The 3500/93 Voting Module is essential in applications where maximizing machinery availability and reliability is as important as ensuring its safety.
Critical Turbine & Compressor Protection:
Used in Triple Modular Redundant (TMR) systems for large steam turbines, gas turbines, and centrifugal compressors. It processes signals from three independent vibration or speed sensors, requiring at least two to agree before a shutdown is triggered, thus preventing a shutdown from a single faulty sensor.
Safety Instrumented Systems (SIS):
A core component in SIS with a Safety Integrity Level (SIL) rating, where redundant and voted architectures are mandatory to achieve the required level of risk reduction.
High-Availability Process Units:
Installed in refineries and petrochemical plants on machinery where an unplanned shutdown would result in massive production loss or a safety hazard. The voting logic ensures the machine only trips when a real fault is confirmed.
Power Generation:
Protects critical assets like boiler feed pumps and main turbines in power plants, ensuring grid stability by avoiding nuisance trips while maintaining protection against genuine faults.
Offshore Platforms:
Used on fire pumps, gas compressors, and power generation equipment on offshore platforms where reliability is crucial due to the harsh environment and the high cost of downtime.
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