Product Introduction: 3500/53-02-00 133388-01
The 3500/53-02-00 133388-01 is a Temperature Monitor / Dual Voting RTD (Resistance Temperature Detector) Module for the Bently Nevada 3500 Machinery Protection System. This specialized module is designed to monitor machine temperature by accepting signals from multiple RTD sensors per channel. Its key feature is the "Dual Voting" logic, which it uses to determine a valid alarm or shutdown condition based on inputs from two RTDs measuring the same point. This architecture significantly enhances reliability by preventing a single sensor failure from causing a unnecessary (spurious) trip of the machinery, while still ensuring a shutdown if a genuine over-temperature condition is detected.
Technical Parameters
The key technical parameters for the 3500/53-02-00 133388-01 module are summarized in the table below.
| Parameter Category | Specification |
|---|---|
| Model & Part Number | 3500/53-02-00 133388-01 |
| Module Type | Temperature Monitor / Dual Voting RTD |
| Input Channels | 4 channels (each channel typically accepts 2 RTDs for voting). |
| Sensor Type | 100 Ohm Platinum RTDs (PT100) conforming to IEC 60751. |
| Temperature Measurement Range | Programmable, typically covering a range from -50°C to +250°C (-58°F to +482°F). |
| Trip Logic | Dual voting (e.g., 2-out-of-2, or other configurable logic) per channel to prevent false trips. |
| Module Dimensions (H x W x D) | Approx. 190 mm x 60 mm x 140 mm (7.5 in x 2.4 in x 5.5 in) [Standard 3500 rack slot] |
| Module Weight | Approx. 0.7 kg (1.5 lbs) |
| Mounting | Slides into a single slot in a 3500 series rack. |
| Power Requirement | Powered by the 3500 rack backplane. |
| Operating Temperature | 0°C to +65°C (+32°F to +149°F) |
| Key Features | • Dual RTD input per channel for voting logic • Prevents spurious trips from a single RTD failure • Provides OK, Alert, and Danger alarms per channel • Continuous sensor and wiring diagnostics |
Note: The dimensions and weight are standard for a module in a 3500 series frame. The specific voting logic and temperature ranges are configured via the 3500 configuration software.
Application Scenarios
The 3500/53-02-00 Dual Voting RTD Module is deployed in applications where reliable temperature monitoring is critical for machine safety and where false trips are extremely costly.
Critical Bearing Temperature Monitoring: Protecting the main and thrust bearings of large turbines, compressors, generators, and large pumps. The dual voting ensures a failure of one RTD does not shut down a multi-million dollar asset unnecessarily.
Motor Winding Temperature: Monitoring temperatures in critical high-voltage motors.
Gearbox Temperature Monitoring: Protecting expensive and critical gearboxes.
Process Industry Applications: Any machinery in chemical, petrochemical, or power generation plants where temperature is a key parameter for a Safety Instrumented Function (SIF) and high availability is required.
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