The Bently Nevada 3500/65 (Part Number: 145988-02) is a high-performance, 16-channel temperature monitoring module designed to integrate seamlessly into the 3500 Machinery Protection System. This module is engineered to accept both Resistance Temperature Detector (RTD) and isolated tip thermocouple (TC) inputs, providing continuous, high-precision monitoring of critical machinery temperatures. By comparing these inputs against user-programmable alarm setpoints, the 3500/65 ensures proactive protection and early detection of potential equipment failure, fully complying with API 670 standards.

Product Specifications

• 📦 Product Type: 16-Channel Temperature Monitor

• 🏷️ Part Number: 145988-02

• 🏭 Manufacturer: Bently Nevada (a Baker Hughes business)

• ⚡ Power Consumption: 3 Watts (nominal)

• 📏 Main Module Dimensions: 241.3 mm × 24.4 mm × 241.8 mm

• ⚖️ Main Module Weight: 0.91 kg

• 📏 I/O Module Dimensions: 241.3 mm × 24.4 mm × 99.1 mm

• ⚖️ I/O Module Weight: 0.45 kg

• 🌍 Origin: USA

• 🛠️ Compatibility: 3500 Series Rack Systems

Frequently Asked Questions (Q&A)

❓ What types of temperature sensors are compatible with the 3500/65?

The module is highly flexible and accepts 100 Ω 3-wire/4-wire platinum RTDs, 120 Ω nickel RTDs, 10 Ω copper RTDs, and various isolated tip thermocouple types (E, J, K, and T). You can mix and match these inputs across the 16 available channels based on your machine’s requirements.

❓ How does the module handle signal accuracy and safety?

The 3500/65 monitors signal integrity using advanced circuitry. For Triple Modular Redundant (TMR) applications, the modules must be installed in groups of three, allowing the system to use 2-out-of-3 voting logic to ensure accurate operation and prevent single-point failures from triggering unnecessary shutdowns.

❓ Is configuration performed through hardware switches or software?

Configuration is handled entirely through the 3500 Rack Configuration Software. This allows you to set specific alarm thresholds (Alert and Danger), input types, and time delays (1 to 60 seconds) without needing physical adjustments to the module itself.

❓ What is the difference between internal and external terminations?

The “Internal Termination” option means the I/O module features built-in terminal blocks for direct wiring. The “External Termination” option requires an additional External Termination (ET) block and cable, which is often preferred for simplifying field wiring in dense installations.

Recommended Bently Nevada 3500 Series Models

To maintain system integrity, consider these commonly integrated components within the 3500 monitoring architecture:

1. 3500/22M – Transient Data Interface (TDI) Module

2. 3500/15 – Power Supply Module

3. 3500/25 – Keyphasor* Module

4. 3500/32M – 4-Channel Relay Module

5. 3500/33 – 16-Channel Relay Module

6. 3500/42M – Proximitor* Seismic Monitor

7. 3500/40M – Proximitor* Monitor

8. 3500/92 – Communication Gateway Module

9. 3500/94M – VGA Display Module

10. 3500/50 – Tachometer Module