Product Description

The 3500/42 (135489-02) is a specialized Proximitor/Seismic Barrier I/O Module designed for the Bently Nevada 3500 Machinery Protection System. This module provides four channels of intrinsically safe (IS) internal barriers, allowing the monitoring system to interface directly with transducers located in hazardous areas without the need for external zener barriers.

Specifically engineered to pair with the 3500/42M Proximitor Seismic Monitor, the 135489-02 manages the power supply to field sensors and conditions return signals for the monitor module. It provides robust electrical isolation and limits the energy entering hazardous zones, ensuring compliance with safety standards while maintaining high-fidelity signal transmission for vibration, position, and speed measurements.

Technical Specifications

• Module Type: Internal Barrier I/O Module

• Part Number: 135489-02

• Compatible Monitor: Bently Nevada 3500/42M

• Number of Channels: 4 Isolated Channels

• Transducer Compatibility: Proximity Probes, Accelerometers, Velomitors

• Input/Output Voltage: 8–24 VDC (Nominal)

• Input Current: 10 mA per channel

• Output Current: 2 A per channel (Max load capacity)

• Hazardous Area Protection: Internal Galvanic/Zener Isolation Barriers

• Operating Temperature: -40 °C to +80 °C (-40 °F to +176 °F)

• Safety Features: Reverse polarity, overvoltage, and short-circuit protection

• Dimensions: Standard 3500 Series Rack Height

Functional Advantages

• Reduced Footprint: By integrating barriers into the 3500 rack I/O, the 135489-02 eliminates the need for additional DIN-rail space for external barrier blocks.

• Signal Integrity: Minimizes signal degradation and noise pickup by reducing the number of intermediate connection points between the sensor and the monitor.

• Diagnostic Capabilities: Works in tandem with the 3500/42M to provide "Not OK" status alerts if a transducer circuit is opened or shorted within the hazardous zone.

• Simplified Wiring: Features high-density internal terminations that streamline field cable management at the rear of the 3500 rack.