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- Bently Nevada 138708-01 3500/40M Proximity Input I/O Module
SKU: 138708-01
Bently Nevada 138708-01 3500/40M Proximity Input I/O Module
The Bently Nevada 138708-01 is a 4-channel Proximity Input I/O Module with internal terminations for the 3500/40M monitor. It provides a direct-wire interface for vibration and position probes, featuring a wide operating temperature range and full industrial safety certifications.
System Purpose and Technical Function
The Bently Nevada 138708-01 acts as the primary hardware interface for the 3500/40M Proximity Monitor within the 3500 Machinery Protection System. This I/O module resides in the rear of the rack, where it accepts raw signals from proximity probes and transmits them to the monitoring card for processing. Because it features internal terminations, this module allows engineers to connect field wiring directly to its screw terminals without needing external terminal blocks. Consequently, the 138708-01 streamlines the installation of radial vibration, axial position, and Keyphasor measurement loops while reducing overall cabinet wiring complexity.
Core Technical Specifications
- Brand:Â Bently Nevada
- Part Number:Â 138708-01
- Module Type:Â Proximity Input I/O with Internal Terminations
- Compatible Monitor:Â Bently Nevada 3500/40M
- Channel Support:Â 4-channel input configuration
- Termination Style:Â Integrated screw terminal blocks
- Operating Temperature: -40°C to +85°C
- Humidity:Â 95% non-condensing
- Hazardous Area Approvals:Â CSA, ATEX, and IECEx certified
- Mounting Location:Â Rear slot of the 3500 series chassis
Operational Features and Industrial Application
Maintenance teams specify the 138708-01 I/O module for critical machinery oversight in power plants, refineries, and chemical processing facilities. The module provides highly stable signal paths for eddy current sensors, ensuring that electromagnetic interference (EMI) does not compromise the vibration data. Furthermore, the internal termination design includes dedicated grounding points for cable shields, which effectively prevents ground loops and signal noise. This reliability makes it an essential component for monitoring:
- Radial shaft vibration in fluid-film bearings
- Axial thrust displacement in steam turbines
- Shaft eccentricity during startup and coast-down
- Speed and phase reference via Keyphasor sensors
Installation and System Maintenance
Technicians install the 138708-01 directly behind the 3500/40M monitor module to establish a secure backplane connection. During the maintenance phase, the module’s rugged construction supports frequent wiring adjustments if sensor configurations change. Moreover, the unit allows for “hot-swapping” under redundant power conditions, meaning operators can replace an I/O module without shutting down the entire machinery protection rack. This feature significantly minimizes unplanned downtime and ensures continuous monitoring of high-value rotating assets.
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128276-01E Product datasheet
Model number: | 128276-01E | Module Type: | Half Future Expansion Panel | |
Manufacture: | Bently Nevada | Condition: | Brand New | |
Range of Product: | 3500 system | Lead time: | In Stock | |
Weight: | 0.04 kg | HS CODE: | 8537101190 | |
Dimension: | 2.5x3x12cm | MOQ: | 1 | |
Product Origin: | USA | System: | TSI | |
Discontinued on: | active | Communication Service: | Ethernet router |
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Featuring advanced relay technology, the 128276-01E Slot Cover 3500 Seriesprovides precise control over various processes, optimizing system performance and reducing operational costs. With its high current rating and switching capacity, it’s capable of handling demanding loads without compromise.
The module is equipped with SPDT relay contacts, ensuring reliable switching action and minimal wear, thus increasing the lifespan of your control system. Additionally, the 128276-01E I/O Moduleboasts an IP67 environmental protection rating, safeguarding against dust and water ingress, even in the most challenging environments.
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3500/05-01-02-01-00-01 Product datasheet
Model number: | 3500/05-01-02-01-00-01 | Module Type: | System Rack | |
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Range of Product: | 3500 System | Lead time: | In Stock | |
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Dimension: | 48.2x28x26.5cm | MOQ: | 1 | |
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3500/60-01-05 136711-01 Product datasheet
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Manufacture: | Bently Nevada | Condition: | Brand New | |
Range of Product: | 3500 system | Lead time: | In Stock | |
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3500/60-01-05 136711-01 Functional Description
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128275-01 Product datasheet
Model number: | 128275-01 | Module Type: | Slot Cover 3500 Future Expansion | |
Manufacture: | Bently Nevada | Condition: | Brand New | |
Range of Product: | 3500 system | Lead time: | In Stock | |
Weight: | 0.06kg | HS CODE: | 8537101190 | |
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Bently Nevada 991-25-50-01-01 Thrust Transmitter
Technical Overview
The Bently Nevada 991-25-50-01-01 is a genuine industrial component designed for reliable operation in demanding environments. This high-quality product ensures optimal performance and long-term durability for your automation systems.
Engineered to meet strict industrial standards, it integrates seamlessly with Bently Nevada monitoring and control systems, providing accurate data collection and reliable operation for critical machinery protection applications.
Detailed Specifications
| Manufacturer | Bently Nevada |
| Part Number | 991-25-50-01-01 |
| Product Type | Industrial Component |
| Condition | Brand New |
| Warranty | 12 Months |
Applications
- Power generation turbines
- Oil & gas compressors
- Industrial rotating machinery
- Predictive maintenance systems
- Process automation
Operational Capabilities
This Bently Nevada component is designed for continuous operation in harsh industrial environments. It provides reliable signal transmission and monitoring capabilities essential for machinery protection systems in power generation, oil & gas, and manufacturing industries.
Technical FAQ
Q: Is this a genuine Bently Nevada product?
A: Yes, this is a 100% genuine Bently Nevada product with full manufacturer warranty.
Q: What is the warranty period?
A: All products come with a standard 12-month warranty.


























