Product Overview

The Bently Nevada 3500/61-01-01, associated with part number 133835-02, is a high-performance Temperature I/O Module designed for the 3500 Machinery Protection System. This specific variant provides a non-isolated interface for Resistance Temperature Detectors (RTDs) and Thermocouples (TCs), serving as the critical link between thermal sensors and the 3500/61 monitor. Equipped with "Internal Terminations," this module allows for direct field wiring to the back of the rack, eliminating the need for external termination blocks and reducing the overall system footprint. It is engineered to provide continuous, high-accuracy thermal surveillance of rotating machinery, ensuring that bearing heats and winding temperatures remain within safe operational parameters to prevent mechanical failure.

Hardware Parameters and Key Technical Characteristics

The 133835-02 module is built to industrial-grade specifications, providing reliable data acquisition in electrically noisy and thermally demanding environments.

• Model Number 3500/61-01-01

• Order Number 133835-02

• Module Type RTD/TC Non-isolated I/O with Internal Terminations

• Channel Capacity Supports up to 6 temperature sensor inputs per module

• Sensor Compatibility 3-wire RTDs (Platinum, Copper, Nickel) and various Thermocouple types (J, K, T, E, etc.)

• Termination Type Euro-style screw terminals for direct internal rack wiring

• Signal Processing High-resolution A/D conversion with cold-junction compensation for thermocouples

• Accuracy Precise thermal tracking exceeding API 670 requirements for machinery protection

• Mounting Installs in the rear of the 3500 rack, paired with the 3500/61 monitor module

• Physical Specifications Weight: 0.4 kg; Dimensions: 2.5 x 11.2 x 24.2 cm

• Compliance Engineered for 24/7 mission-critical industrial monitoring

Industrial Applications and Operational Use Cases

The 3500/61-01-01 is essential for Turbine Supervisory Instrumentation (TSI) and comprehensive asset health management across diverse energy and process sectors.

• Steam and Gas Turbine Bearings Monitoring radial and thrust bearing temperatures to detect lubrication breakdown or misalignment before physical damage occurs.

• High-Voltage Electric Motors Tracking stator winding temperatures to prevent insulation degradation caused by thermal overloading.

• Centrifugal Compressor Stages Continuous surveillance of suction and discharge gas temperatures to optimize thermodynamic efficiency and detect surge-related heat spikes.

• Hydroelectric Generator Protection Monitoring the temperature of large-scale guide bearings and thrust pads in water-driven power generation units.

• Industrial Gearboxes Providing thermal health data for high-speed gear sets in petrochemical refineries and heavy manufacturing plants.

By integrating the 133835-02 I/O module into the 3500 system, reliability engineers can implement automated alarm and trip logic based on real-time temperature data, significantly reducing the risk of unplanned downtime and extending equipment lifespan.