Bently Nevada 135489-03 I/O Module

This I/O module provides the interface between field sensors and the Bently Nevada 3500 monitoring system. It accepts inputs from proximity probes, accelerometers, and velocity sensors. The module houses internal barriers for safe operation in hazardous areas.

Input Configuration and Channel Architecture

The Bently Nevada 135489-03 supports four independent input channels for vibration and position monitoring. It accepts 4 × Velomitor channels for real-time vibration signal acquisition from rotating equipment. The module also handles proximity probes and accelerometers through the same flexible interface. An internal termination design simplifies field wiring and eliminates external connection requirements.

Technical Specifications

Specification	Detail
Model	135489-03
Product Type	I/O Module with Internal Barriers
System Compatibility	Bently Nevada 3500 Series
Input Channels	4 (Velomitor / Proximity / Accelerometer)
Input Impedance	10 kΩ (proximity and acceleration)
Input Voltage	24 V DC
Frequency Range	10 Hz to 1 kHz
Power Consumption	7.0 W to 7.7 W typical
Output Signal	4-20 mA analog
Dimensions (H×W×D)	241.3 × 24.4 × 163.1 mm
Weight	0.46 kg to 0.7 kg
Operating Temp	-30°C to +65°C
Storage Temp	-40°C to +85°C
Humidity	95% non-condensing
Certifications	CE, UL, CSA, Intrinsically Safe

Internal Safety Barriers and Hazardous Area Compliance

The module integrates intrinsic safety barriers that protect transducers in explosive atmospheres. These barriers limit the energy entering the hazardous area to prevent ignition. Galvanic isolation eliminates ground loop interference for clean signal transmission. The module complies with Class I, Division 1 hazardous location requirements.

System Integration and Application Use

This module connects to 3500 rack monitors including the 3500/42M and 3500/40M series. It supports hot-swap capability for module replacement without system shutdown. Industries include power generation, oil and gas, and chemical processing facilities. The module serves critical turbines, compressors, and pumps requiring continuous vibration monitoring.