3500/60-01-00 Bently Nevada | Internal Terminations Unit

Product Overview

The Bently Nevada 3500/60-01-00 is a high-performance temperature monitor designed for continuous machinery protection. It accepts input from up to six Resistance Temperature Detectors (RTD) or Thermocouples (TC), providing critical thermal monitoring for rotating equipment like turbines, pumps, and motors. By converting sensor data into actionable alarms and proportional 4-20 mA signals, this module prevents catastrophic failure due to overheating and ensures long-term operational reliability.

Technical Configuration

The configuration for the 3500/60-01-00 model is defined as follows:

• I/O Module Type (01): RTD/TC Non-isolated I/O Module with Internal Terminations. This allows for direct field wiring to the back of the 3500 rack without external terminal blocks.
• Agency Approval (00): No specific hazardous area approvals selected (Standard Version).

Technical Specifications

Engineering & Installation Guide

System Placement

The 3500/60 system consists of the main monitor module and a corresponding I/O module. The monitor fits into any full-height slot in the front of the 3500 rack, while the non-isolated I/O module must be installed in the same slot position on the rear of the rack.

Internal Termination Wiring

This module features internal terminations, allowing field wiring to connect directly to the I/O module. When using 3-wire or 4-wire RTDs, ensure that lead wire lengths are minimized or properly compensated in the software to maintain high measurement precision.

Alarm Delay & Logic

Alert and Danger setpoints are fully programmable via the 3500 rack configuration software. Users can set alarm time delays (1 to 60 seconds) to filter out transient thermal spikes, ensuring that trips only occur during sustained over-temperature conditions.

Engineering Advantages

Non-Contact & Precision Measurement

The 3500/60 offers high-impedance inputs (10 MΩ) and dedicated cold junction compensation for thermocouples, ensuring signal integrity even in electrically noisy industrial environments.

Real-time Visual Diagnostics

The front panel includes an OK LED to indicate module health, a TX/RX LED for communication status across the backplane, and a Bypass LED to warn operators when machinery protection is inactive during testing.

Comprehensive Recorder Function

Unlike basic sensors, the 3500/60 provides individual 4-20 mA outputs for every channel. These outputs are short-circuit protected and do not affect the monitor’s internal alarm logic if the recorder loop is compromised.

Technical FAQs

Q1: What is the difference between the 3500/60-01-00 and versions with an 01 or 02 suffix?

A1: The suffix "00" indicates that this module does not have specific ATEX/CSA hazardous area agency approvals. It is designed for use in standard industrial settings where these certifications are not required.

Q2: Does the module support 2-wire RTDs?

A2: While optimized for 3-wire and 4-wire RTDs to provide better accuracy, 2-wire RTDs can be used but may result in lower accuracy due to the lack of lead-wire resistance compensation.

Q3: Can I monitor different types of sensors on one module?

A3: Yes, the 3500/60 can simultaneously process signals from both RTDs and Thermocouples across its six channels, provided each channel is correctly configured in the 3500 software.