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- Bently Nevada
- 3500/40M 125680-01
- Proximitor Monitor I/O Module
- USA
- 241.3 mm × 24.4 mm × 241.8 mm
- 0.91kg
- Xiamen, China
- New & In Stock
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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1. Product Overview
Model: 3500/40M 125680-01
Type: Proximitor I/O Module
Brand: Bently Nevada
Series: 3500 Machinery Protection System
Dimensions: 241.3 mm (H) × 24.4 mm (W) × 241.8 mm (D)
Weight: 0.91 kg
Power Consumption: 7.7 W (typical)
Input Channels: 4 differential inputs
Sensor Compatibility: Bently Nevada 3300 XL proximity probes, 330500 velocity sensors
Measurement Parameters: Radial vibration, axial displacement, differential expansion, eccentricity, REBAM (Rolling Element Bearing Analysis Method)
Output Signals: 4–20 mA analog, RS-485 Modbus RTU
Operating Temperature Range: –40°C to +85°C
Certifications: CE, RoHS, API 670 compliant
2. Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 3500/40M 125680-01 |
| Input Channels | 4 differential inputs (10kΩ impedance) |
| Sensor Compatibility | Bently Nevada 3300 XL proximity probes, 330500 velocity sensors |
| Measurement Parameters | Radial vibration, axial displacement, differential expansion, eccentricity, REBAM |
| Sensitivity | 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil) |
| Frequency Response | 0.1 Hz to 10 kHz |
| Outputs | 4–20 mA analog signals, RS-485 Modbus RTU |
| Power Supply | 24 VDC ±10% (7 W typical) |
| Operating Temperature | –40°C to +85°C |
| Physical Dimensions | 241.3 mm × 24.4 mm × 241.8 mm |
| Weight | 0.91 kg |
| Isolation Voltage | 1000 VDC (input/output to ground) |
| LED Indicators | Power (green), TX/RX (flashing), Channel Fault (red per channel) |
| Certifications | CE, RoHS, API 670 compliant |
| Mounting | Rack-mounted in 3500 Series enclosure |
3. Product Introduction
The 3500/40M 125680-01 Proximitor I/O Module is a four-channel monitor designed for continuous monitoring of machinery parameters. It accepts input from Bently Nevada proximity transducers, conditions the signal to provide various vibration and position measurements, and compares the conditioned signals with user-programmable alarms. This module is integral to the 3500 Machinery Protection System, offering real-time analysis and alerts to help prevent machinery failure.
4. Applications
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Power Plants: Monitoring turbine shafts, generators, and pumps for early detection of abnormal vibrations.
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Oil & Gas Industry: Real-time monitoring of compressors, drilling rigs, and rotating equipment to prevent unplanned shutdowns.
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Chemical & Petrochemical Plants: Protection of reactors, compressors, and pumps from vibration-induced damage.
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Water & Wastewater Facilities: Ensures reliability of pumps and motors by continuous vibration monitoring.
5. Product Advantages
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High Precision: 16-bit ADC with ±0.5% linearity enables accurate detection of vibration and position.
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Multi-Sensor Compatibility: Supports a wide range of sensor types, including proximity probes and velocity sensors.
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Hot-Swappable Design: Allows module replacement without interrupting system operation, reducing downtime.
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Industry Compliance: Meets API 670 standards for rotating machinery protection.
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Flexible Output Options: Analog and digital outputs enable integration with diverse control and monitoring systems.
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Compact & Rugged: Small form factor fits standard 3500 racks, built to withstand harsh environments.
6. Brand & Series
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Brand: Bently Nevada
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Series: 3500 Machinery Protection System
7. Related and Popular Models
Related Models (Same Series or Similar Function)
| Model | Input Channels | Sensor Compatibility | Output Signals | Notes |
|---|---|---|---|---|
| 3500/40M 125680-01 | 4 | Proximity, velocity, accelerometer | Analog, digital | Standard 4-channel input module |
| 3500/40M 140734-01 | 4 | Proximity, velocity, accelerometer | Analog, digital | Standard vibration monitoring module |
| 3500/42M 140734-02 | 4 | Proximity, velocity, accelerometer | Analog, digital | Adds Modbus RTU communication support |
| 3500/44M 140734-03 | 4 | Proximity, velocity, accelerometer | Analog, digital | Aero-derivative gas turbine application |
| 3500/46M 140734-06 | 4 | Proximity, velocity, accelerometer | Analog, digital | Hydro machinery specific model |
Popular Models (Same Brand)
| Model | Input Channels | Sensor Type | Output Type | Application Focus |
|---|---|---|---|---|
| 3500/32M | 4 | Temperature sensors | Analog | Temperature monitoring |
| 3500/33 | 4 | Temperature sensors | Analog | Dedicated temperature module |
| 3500/60 | 8 | Temperature sensors | Analog | Extended temperature monitoring |
| 3500/61 | 8 | Temperature sensors | Analog | High-temperature regions |
| 3500/77M | 8 | Temperature sensors | Analog | High-temp zone temperature monitoring |
8. Frequently Asked Questions (Q&A)
Q1: What types of sensors are compatible with the 3500/40M 125680-01?
A1: This module works with Bently Nevada 3300 XL proximity probes and 330500 velocity sensors, supporting accurate vibration and displacement measurement.
Q2: How many input channels does this module have?
A2: It includes 4 independent differential input channels to monitor multiple sensors simultaneously.
Q3: What kinds of measurements can this module perform?
A3: The 3500/40M measures radial vibration, axial displacement, differential expansion, eccentricity, and supports rolling element bearing analysis.
Q4: What outputs are available for monitoring or control systems?
A4: It provides 4–20 mA analog outputs and supports RS-485 Modbus RTU communication for digital data exchange.
Q5: Is the module designed for continuous operation in industrial environments?
A5: Yes, it is built to operate continuously within a temperature range of –40°C to +85°C and complies with API 670 standards for reliability.
Q6: Can this module be replaced without shutting down the entire system?
A6: Yes, the module supports hot-swapping, allowing replacement or maintenance without system interruption.
Q7: What are the physical size and weight specifications?
A7: It measures approximately 241.3 mm high, 24.4 mm wide, and 241.8 mm deep, weighing about 0.91 kg.
Q8: How is the module installed?
A8: It is designed to be mounted in a 3500 Series rack enclosure, ensuring secure and convenient installation.
Q9: What makes this module suitable for vibration monitoring in rotating machinery?
A9: Its high-resolution signal processing and compatibility with proven sensors provide precise, real-time vibration and displacement data essential for machine protection.
Q10: Does the module provide any diagnostic indicators?
A10: Yes, it features LED indicators for power status, communication activity, and channel faults, aiding in quick diagnostics.
Authenticity guarantee
All product specifications are original and authentic imported products. We have an annual sales volume of 300 million yuan, and we only produce original and authentic products. All customers who cooperate with us directly online can enjoy low discounts.
Free warehouse
We have a complete range of product models, 80% of conventional models are in stock, and we have established channels in Asia, Africa, North America, South America, and Europe, effectively shortening the order processing time and satisfying customers in a timely manner.
Technical Team
Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
Thoughtful after-sales service
24-hour after-sales service guarantee team, professional and standardized management service system.