The Bently Nevada 3500/40 125672-01 Discrete I/O Module is a four-channel monitoring solution designed for integration within the 3500 Machinery Protection System. It accepts input from Bently Nevada proximity transducers, processes vibration and position measurements, and compares these readings to configurable alarm setpoints. Each channel can be individually programmed to perform functions such as radial vibration, thrust position, eccentricity, differential expansion, or REBAM (Rolling Element Bearing Analysis Module).

Technical Specifications

Applications

• Machinery Protection – Continuous monitoring of vibration, thrust, and expansion to detect abnormal conditions.

• Rotating Equipment Monitoring – Suitable for turbines, compressors, motors, and pumps.

• Maintenance Planning – Early detection of faults to reduce unplanned downtime.

• Marine & Offshore – Compliant with ABS and DNV GL standards.

• Hazardous Areas – Certified for use in Zone 2 and Division 2 environments.

Advantages

• Multi-function channel configuration for diverse measurement needs.

• High accuracy with ±0.33% typical full-scale error.

• Programmable alarm setpoints for both alert and danger levels.

• Rugged design for harsh industrial environments.

• Supports internal and external termination options.

• Compatible with barrier I/O modules for hazardous area applications.

FAQ

Q1: What type of signals can the 3500/40 accept?

A1: It accepts 1–4 proximity transducer signals.

Q2: Can each channel be configured for different measurement types?

A2: Yes, channels are programmed in pairs, allowing different measurement types for each pair.

Q3: What is the main purpose of this module?

A3: To provide machinery protection and operational diagnostics.

Q4: Is it suitable for hazardous environments?

A4: Yes, it has ATEX, IECEx, and cNRTLus approvals for Zone 2 and Division 2.

Q5: What is the operating temperature range?

A5: -30°C to +65°C (depending on I/O type).

Q6: Does it have marine certification?

A6: Yes, it meets ABS and DNV GL requirements.

Q7: How are alarm setpoints configured?

A7: Using the 3500 Rack Configuration Software.

Q8: What is the accuracy of vibration measurements?

A8: Typically ±0.33% of full scale.

Q9: Can it output buffered transducer signals?

A9: Yes, each channel has a buffered output connector.

Q10: What is the weight of the I/O module?

A10: 0.20 kg.