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The Bently Nevada 3500/25 128726-01 is a key component within the 3500 Series Machinery Protection System. Designed to provide accurate, real-time machinery condition data, this module functions as a Keyphasor® Interface. It is responsible for conditioning the signal from a Keyphasor transducer and transmitting this signal to other modules in the system, such as vibration monitors.
Used widely in industrial environments, the 3500/25 ensures reliable and precise speed and phase reference signals, critical for machinery diagnostics and protection. Built for robust industrial applications, this module ensures long-term durability, accurate timing data, and dependable integration with the entire 3500 series monitoring rack.
| Parameter | Value |
|---|---|
| Model Number | 3500/25 128726-01 |
| Type | Keyphasor Module |
| Input | Magnetic or Proximity Probe Input |
| Channels | 2 Independent Channels |
| Outputs | TTL Compatible Square Wave |
| Signal Conditioning | Adjustable Threshold and Hysteresis |
| Communication Interface | Proprietary Internal Bus |
| Compatible Rack System | 3500 Series |
| Mounting | 3500 Rack Slot (Single Width) |
| Power Consumption | < 3 Watts |
| Operating Temperature | -30°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 95% Non-Condensing |
| Dimensions (H x W x D) | 241 mm x 24 mm x 241 mm |
| Weight | 0.45 kg |
| Certifications | CE, CSA, ATEX |
Turbomachinery Monitoring: Accurate shaft rotational data for steam, gas turbines.
Industrial Pumps and Compressors: Keyphasor signals for vibration phase referencing.
Gearbox Monitoring: Detection of gear faults using phase tracking.
Generator Systems: Synchronizing vibration monitoring with rotational speed.
Refinery and Petrochemical Equipment: High-reliability applications in hazardous zones.
High Accuracy: Ensures precise detection of key shaft positions for phase and speed measurements.
Dual-Channel Functionality: Allows redundancy or multi-signal processing from multiple sensors.
Robust Design: Engineered for harsh environments and long-term operation.
Integrated System Compatibility: Fully integrates with 3500 Series racks and other monitoring modules.
Real-time Diagnostics: Supports continuous machine protection and analysis.
Brand: Bently Nevada
Series: 3500 Machinery Protection Series
Function: Vibration and Rotational Speed Monitoring Interface
| Model | Description | Input Type | Channels | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 3500/22M 288055-01 | Transient Data Interface | Ethernet | 2 | 241 x 24 x 241 | 0.50 |
| 3500/33 149986-01 | 16-Channel Relay Module | Digital Relay | 16 | 241 x 24 x 241 | 0.55 |
| 3500/42M 140734-02 | Proximitor® / Seismic Monitor | Proximity / Seismic | 4 | 241 x 24 x 241 | 0.47 |
| 3500/40M 140734-01 | Proximitor® Monitor | Proximity Probe | 4 | 241 x 24 x 241 | 0.46 |
| 3500/32M 149992-01 | 4-Channel Relay Module | Relay | 4 | 241 x 24 x 241 | 0.50 |
| Model | Description | Input Type | Channels | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 3500/15 106M1079-01 | Power Supply Module (AC) | AC Power | – | 241 x 24 x 241 | 0.48 |
| 3500/05 140734-02 | System Rack | Module Rack | – | 267 x 483 x 318 | 6.80 |
| 3300 XL 8mm | Proximity Transducer System | Proximity | 1 | Probe Length Dependent | 0.30 |
| 3500/93 149992-01 | Display Interface Module | LCD / LED Display | – | 241 x 24 x 241 | 0.60 |
| 3500/60 140734-01 | Temperature Monitor Module | RTD / Thermocouple | 6 | 241 x 24 x 241 | 0.45 |
Q1: What is the main function of the 3500/25 module?
A1: The primary function is to receive and condition signals from Keyphasor probes, providing a TTL square wave output for use by other monitoring modules in the system.
Q2: Can this module be used with other series outside the 3500?
A2: No, the 3500/25 is specifically designed for integration with the 3500 Series rack system.
Q3: How many channels does it support?
A3: It supports 2 independent Keyphasor channels for redundant or dual-probe configurations.
Q4: Is the module hot-swappable?
A4: No, it is not hot-swappable. The system must be powered down before installing or replacing the module.
Q5: What types of sensors are compatible with this module?
A5: Magnetic pickups and proximity probes such as the 3300 XL series are commonly used.
Q6: What are typical applications of this module?
A6: It’s commonly used in turbines, compressors, gearboxes, and other rotating machinery for phase and speed reference.
Q7: Is the module programmable or configurable?
A7: Yes, configuration is done through the 3500 Configuration Software to set thresholds, pulse detection parameters, and signal conditioning.
Q8: Does it support hazardous environment installation?
A8: Yes, the module is certified for ATEX and CSA environments, allowing it to be used in explosive atmospheres.
Q9: What maintenance does the module require?
A9: Very little; periodic signal checks and cleaning connectors during scheduled maintenance is usually sufficient.
Q10: Can two Keyphasor signals be processed independently?
A10: Yes, the dual-channel architecture allows separate processing for each probe input.
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