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- Bently Nevada
- 3500/40 125680-01
- Proximitor I/O Module With Internal Terminals
- USA
- 241.3 x 24.4 x 99.1 mm
- 0.2 kg
- Xiamen, China
- New & In Stock
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The Bently Nevada 3500/40 (125680-01) is a high-reliability Proximitor I/O Module with internal terminations, designed for use within the 3500 Machinery Protection System.
This module serves as a critical interface between proximity transducers and monitoring systems, enabling accurate measurement of vibration, displacement, and shaft position. It plays a key role in protecting rotating machinery by ensuring precise signal processing and real-time condition monitoring.
Built for industrial environments, the module ensures stable operation in demanding applications where equipment protection and uptime are essential.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 3500/40 |
| Part Number | 125680-01 |
| Product Type | Proximitor I/O Module (Internal Terminals) |
| System Series | 3500 Machinery Protection System |
| Input Signals | 1 to 4 proximity transducer inputs |
| Signal Type | Vibration and displacement signals |
| Power Consumption | 7.7 W (typical) |
| Transducer Supply | -24 VDC |
| Output Impedance | 550 Ω |
| Sensitivity | 3.94 / 7.87 mV/μm (depending on configuration) |
| Dimensions | 241.3 × 24.4 × 99.1 mm |
| Weight | 0.2 kg |
| Mounting Type | Rack-mounted (3500 system rack) |
| Operating Environment | Industrial-grade |
| Functionality | Signal conditioning and alarm comparison |
Core Functionality
The 3500/40 Proximitor I/O Module is designed to process signals from proximity sensors and convert them into meaningful machinery condition data.
Main Functions:
- Receives input from proximity transducers
- Conditions and filters raw signals
- Generates vibration and displacement measurements
- Compares data with configured alarm thresholds
- Supports multi-channel monitoring
Measured Parameters Include:
- Radial vibration
- Axial (thrust) position
- Shaft eccentricity
- Differential expansion
- REBAM monitoring
This enables early fault detection and helps prevent equipment failure.
Working Principle
The module operates as part of a signal processing chain within the 3500 system:
- Proximity transducers detect mechanical movement
- Signals are transmitted to the I/O module
- The module conditions and converts signals into usable data
- Data is analyzed by the monitoring system
- Alarm outputs are triggered if thresholds are exceeded
This process ensures continuous protection of critical rotating machinery.
Role in Machinery Protection Systems
The 125680-01 module is a key component of the Bently Nevada 3500 architecture, widely used for condition monitoring and machine protection.
It supports communication between:
- Proximity probes
- Monitoring modules (3500/40M)
- Control systems
- Alarm and shutdown systems
Its primary role is to ensure:
- Accurate measurement of machine conditions
- Reliable alarm triggering
- Continuous system monitoring
Typical Industrial Applications
This module is widely used in industries that rely on rotating equipment, including:
- Power generation (turbines and generators)
- Oil and gas (compressors and pumps)
- Petrochemical processing
- Heavy manufacturing
- Mining and metals
It is especially critical in applications where unexpected equipment failure must be avoided.
Installation & Integration
The module is designed for seamless integration into the 3500 rack system.
Installation Features:
- Mounted directly into the 3500 system rack
- Equipped with internal terminations for simplified wiring
- Compatible with proximity probe systems
- Configured via 3500 rack software
Proper installation ensures stable signal transmission and accurate monitoring.
Compatible System Components
The 3500/40 (125680-01) typically operates with:
- 3500/40M Proximitor Monitor
- Proximity probes and transducers
- 3500 rack system (3500/05)
- Power supply modules (3500/15)
- Communication gateway modules
Together, these components form a complete machinery protection system.
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| 3500/40M | Proximitor Monitor | 4-channel monitoring | Standard systems |
| 3500/42M | Vibration Monitor | Enhanced vibration analysis | Advanced monitoring |
| 3500/45 | Position Monitor | Axial and expansion monitoring | Precision systems |
| 3500/50 | Speed Monitor | Overspeed protection | Turbine systems |
| 3500/15 | Power Module | System power supply | All 3500 racks |
Key Advantages
- High-precision signal conditioning
- Supports multi-channel monitoring
- Enables early fault detection
- Fully integrated with 3500 protection systems
- Designed for continuous industrial operation
- Improves machinery reliability and safety
Technical FAQs
What does the 125680-01 module do?
It processes proximity sensor signals and provides vibration and displacement data for machinery protection.
How many channels does it support?
It supports up to four proximity transducer inputs.
Is it part of a larger system?
Yes, it operates within the Bently Nevada 3500 machinery protection system.
Conclusion
The Bently Nevada 3500/40 (125680-01) Proximitor I/O Module is an essential component for industrial machinery monitoring and protection. With its ability to accurately process proximity signals and trigger alarms, it ensures safe and reliable operation of critical rotating equipment.
For engineers and maintenance teams, this module provides a dependable solution for real-time condition monitoring and system protection.