Bently Nevada 3500/60-01-02 | RTD/TC Temperature Monitor

Product Overview

The Bently Nevada 3500/60-01-02 is a high-precision temperature monitor designed to provide continuous, machinery protection by monitoring 1 to 6 RTD or Thermocouple (TC) transducer signals. As a critical component of the 3500 Series Machinery Protection System, this module ensures the thermal stability of large rotating machinery, such as turbines and compressors. It processes inputs to drive alarms and provide proportional 4 to 20 mA recorder outputs for trend analysis and integration with external control systems.

Technical Configuration

The 3500/60-01-02 model suffix defines the following hardware architecture:

• I/O Module Type (01): RTD/TC Non-isolated I/O Module with Internal Terminations. This configuration is optimized for standard industrial wiring within the 3500 rack.
• Agency Approval (02): ATEX/IECEx/CSA (Class 1, Zone 2) certified for safe operation in hazardous environments.

Technical Specifications

Engineering & Installation Guide

Rack Space & Placement

The 3500/60 system requires two dedicated slots: the Monitor Module occupies one full-height front slot, while the I/O Module requires the corresponding full-height rear slot. Ensure proper alignment of the backplane connectors during installation.

Wiring for RTDs

The module supports both 3-wire and 4-wire RTD configurations. For 4-wire RTDs, the module utilizes a single current supply, while 3-wire configurations use two supplies to compensate for lead wire resistance, ensuring measurement accuracy across long cable runs.

Alarm Configuration

Users can program Alert and Danger setpoints via 3500 Configuration Software. Alarm time delays are adjustable (Alert: 1-60s; Danger: 1-60s) to prevent nuisance tripping during transient thermal events.

Engineering Advantages

Machine Protection Reliability

Equipped with dedicated front-panel LEDs (OK, TX/RX, and Bypass), the module provides instant visual diagnostics. The internal cold junction compensation for Thermocouples ensures accuracy within ±1°C at room temperature.

Hazardous Area Compliance

With 02 suffix certification, this module meets ATEX and IECEx standards for Zone 2 environments, providing safety assurance for oil, gas, and chemical processing facilities.

Technical FAQs

Q1: What is the benefit of the Non-Isolated I/O Module with Internal Terminations?

A1: Internal terminations simplify wiring by allowing direct connection to the I/O module without requiring external termination blocks, reducing cabinet complexity and space requirements.

Q2: How does the "Bypass" mode function on the 3500/60?

A2: When the Bypass LED is lit, the monitor's alarm outputs are suppressed. This allows for sensor maintenance or testing without triggering a machine shutdown.

Q3: Can I mix RTDs and Thermocouples on the same module?

A3: Yes, the 3500/60 is designed to accept any combination of up to 6 RTD or TC signals, provided the software configuration matches the physical wiring for each channel.