Description
Product Overview
The BENTLY 3500/25 is a dedicated Keyphasor® module used within Bently Nevada 3500 Series machinery protection systems. Its primary function is to process rotational reference signals from proximity probes or magnetic pickups and convert them into precise speed and phase reference data. These signals are essential for accurate vibration analysis, rotor dynamics monitoring, and machinery protection functions.
Engineered for high reliability, the 3500/25 module is widely used in turbines, compressors, pumps, and other critical rotating machinery where exact shaft position and speed measurement are required.
Key Features
- Dedicated Keyphasor signal processing module
- Designed for Bently Nevada 3500 Series racks
- Accurate speed and phase reference generation
- High immunity to electrical noise
- Suitable for continuous, 24/7 operation

BENTLY 3500/25
Product Parameters
| Parameter | Specification |
|---|---|
| Product Model | 3500/25 |
| Manufacturer | Bently Nevada |
| Product Type | Keyphasor Module |
| System Series | Bently Nevada 3500 |
| Input Signal | Proximity probe or magnetic pickup |
| Output Function | Speed and phase reference |
| Mounting Type | 3500 rack-mounted |
| Operating Mode | Continuous operation |
Product Datasheet (Technical Summary)
| Technical Item | Description |
|---|---|
| Signal Processing | Rotational reference and speed detection |
| Channel Configuration | Multi-channel Keyphasor input |
| Communication | Internal 3500 rack backplane |
| Power Supply | Provided via 3500 rack |
| Diagnostics | Built-in self-monitoring |
| Operating Environment | Industrial control cabinet |
Country of Origin
United States (USA)
Product Keywords
BENTLY 3500/25 Keyphasor Module, Machinery Protection Reference Card, Shaft Speed Monitoring Module, Rotor Phase Measurement,
Bently Nevada Spare Parts,
Machinery Protection Modules
Usage Instructions
- Ensure the 3500 rack is powered off before installing the module.
- Insert the 3500/25 module into the designated slot in the 3500 rack.
- Secure the module and connect the Keyphasor sensor wiring as required.
- Restore power and allow the system to initialize.
- Verify speed and phase signals through the monitoring system interface.
Frequently Asked Questions (Q&A)
Q1: What is the main purpose of the 3500/25 module?
A: It provides shaft speed and phase reference signals for vibration and rotor analysis.
Q2: Can the 3500/25 operate continuously?
A: Yes, it is designed for continuous 24/7 machinery protection applications.
Q3: What sensors can be used with this module?
A: Proximity probes and magnetic pickup sensors are commonly used.
Q4: Is the module interchangeable within the 3500 system?
A: Yes, it can be installed in any compatible slot within a 3500 rack.
Q5: Is system configuration required after installation?
A: Signal verification and system configuration checks are recommended after installation.
Similar Model Recommendations
| Model Number | Description |
|---|---|
| 3500/40M | Proximitor / Seismic Monitor |
| 3500/42M | Vibration Monitoring Module |
| 3500/50M | Overspeed Detection Module |
| 3500/22M | Transient Data Interface |
| 3500/25-02 | Keyphasor Module, newer revision |

