Phase Reference & Speed Module | Bently Nevada 3300/25
Manufacturer: Bently Nevada
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Part Number: 3300/25
Condition：New with Original Package
Product Type: Phase Reference Sensors
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The Bently Nevada 3300/25 Keyphasor Module provides essential timing and phase reference signals for the 3300 Machinery Protection System. This dual-channel module accepts raw inputs from proximity probes or magnetic pickups and converts them into conditioned TTL-compatible square waves. These signals enable other monitors in the rack to calculate critical parameters including shaft speed, phase angle, and synchronized vibration vectors. We deliver this unit as 100% Brand New and Original, ensuring high-fidelity signal processing for your most critical rotating assets.
Part Number Breakdown: 3300/25-AA-BB-CC-DD-EE-FF-GG
The 3300/25 configuration uses a specific matrix to define input types and agency approvals. The configuration 3300/25-05-04-17-00-00-02-01 follows this logic:
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05: Designates specific Transducer Input options.
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04: Defines the Scale Range for speed monitoring.
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17: Sets the Agency Approval (e.g., CSA/NRTL/C for Class I, Div 2).
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00: Internal Barrier option (None).
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00: Safety Configuration.
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02: Display Type / Orientation.
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01: Specific hardware revision/firmware build.
Technical Specifications
| Parameter | Details |
| Channels | 2 Independent Keyphasor Channels |
| Input Types | Proximity Probes or Magnetic Pickups |
| Frequency Range | 0.016 Hz to 100 kHz (up to 6,000,000 CPM) |
| Input Voltage Range | ±24 V Max |
| Timing Accuracy | 1 µs Resolution |
| Output Signals | Conditioned TTL-compatible square wave |
| Isolation Voltage | 250 V continuous |
| Operating Temp | 0°C to +65°C |
| Certifications | CE, CSA, UL, ATEX, IECEx |
Engineering Advantages
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Diagnostic Precision: The 3300/25 provides a 1-microsecond timing resolution. This precision eliminates jitter in the phase reference signal, allowing engineers to generate accurate Bode and Polar plots for machinery balancing and startup/coast-down analysis.
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Universal Sensor Compatibility: The module's flexible input stage handles both active Eddy Current Proximity Probes and passive Magnetic Pickups. This versatility allows you to standardize on a single module type for varying machine trains.
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System-Wide Distribution: Once conditioned, the Keyphasor signal travels across the 3300 rack backplane. This allows every vibration monitor in the rack to access the timing reference without redundant field wiring.
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Industrial Robustness: Built-in RFI/EMI filtering protects the signal from electromagnetic interference caused by high-voltage motors or VFDs, ensuring stable speed readings in harsh industrial environments.
FAQs
Q: Can I use one 3300/25 module for two different machines?
A: Yes. Since the module features two independent channels, it can process Keyphasor signals from two separate shafts, provided both shafts reside on machines monitored by the same 3300 rack.
Q: Does the 3300/25 require a specific I/O module?
A: Yes. The 3300/25 monitor module requires a corresponding I/O module mounted at the rear of the 3300 rack to provide the physical BNC or terminal block connections for the sensors.
Q: Is the 3300/25 compatible with the 3500 series?
A: No. The 3300/25 is designed exclusively for the Bently Nevada 3300 system backplane. For 3500 systems, you must use the 3500/25 Enhanced Keyphasor Module.
Q: How do I adjust the threshold for the Keyphasor pulse?
A: You can adjust the trigger threshold and hysteresis via the front panel potentiometers or through software configuration (depending on the specific hardware revision), allowing you to compensate for varying gap distances or surface irregularities on the target.