133811-02 Bently Nevada 3500/61 RTD/TC Monitor Card

Product Overview

The Bently Nevada 133811-02 serves as a core six-channel temperature monitoring module within the 3500 Machinery Protection System. This module processes inputs from both Resistance Temperature Detectors (RTDs) and Thermocouples (TCs) to provide continuous thermal monitoring of critical machinery components like bearings and stator windings. We supply this unit as 100% Brand New and Original, ensuring your industrial assets remain protected against overheating and thermal stress.

Technical Specifications

Engineering Advantages

• Simultaneous Multi-Point Tracking: The 133811-02 tracks six independent temperature points concurrently. This allows engineers to monitor multiple bearing temperatures or stator phases within a single rack slot, maximizing space efficiency in the 3500 system.

• Dual-Input Versatility: This module accepts both RTD and Thermocouple inputs. This versatility eliminates the need for separate monitor types for different sensors, simplifying your spare parts inventory and reducing system complexity.

• Precision Thermal Trip Logic: The 3500/61 firmware provides programmable alarm and danger setpoints for each channel. By triggering automatic machinery shutdowns during thermal excursions, it prevents catastrophic bearing meltdowns and insulation failure.

• High-Integrity Signal Processing: Advanced internal filtering rejects electromagnetic interference (EMI) commonly found in large motor and generator environments. This ensures that the monitor reports only true temperature data, preventing false trips caused by electrical noise.

FAQs

1. Does the 133811-02 require a specific I/O module?

Yes. You must pair the 133811-02 monitor with the correct 3500/61 I/O module (typically the 133819-01 for internal termination or 133827-01 for external termination). The I/O module defines the physical terminal connections for your RTDs or Thermocouples.

2. Can I mix RTDs and Thermocouples on the same module?

The 3500/61 module supports mixed inputs, but you must configure each channel individually via the 3500 Rack Configuration Software to match the specific sensor type (e.g., 100-ohm Platinum RTD vs. Type K Thermocouple).

3. What is the difference between the 133811-01 and the 133811-02?

The suffix "-02" typically designates a specific hardware revision or agency approval configuration. The 133811-02 ensures compatibility with the latest 3500 system firmware and meets modern industrial safety standards.

4. How does the module handle a broken sensor wire?

The 133811-02 features comprehensive "Not OK" logic. If a sensor lead breaks or shorts, the module identifies the fault, suppresses the alarm for that channel to prevent a false trip, and notifies the operator via the system status LEDs.