3500/25 149369-01 Bently Nevada Speed and Phase Reference
Manufacturer: Bently Nevada
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Part Number: 3500/25-01-01-00 149369-01
Condition：New with Original Package
Product Type: Keyphasor Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The Bently Nevada 3500/25 Enhanced Keyphasor Module (149369-01) provides critical timing and phase reference signals for the 3500 Machinery Protection System. This half-height module accepts inputs from proximity probes or magnetic pickups to track rotating shafts. It converts these raw pulses into digital timing references, enabling other modules in the rack to calculate shaft speed, phase angle, and synchronized vibration vectors. We deliver this unit as 100% Brand New and Original in factory-sealed packaging.
Part Number Breakdown: 3500/25-AA-BB-CC
The 3500/25 uses specific alphanumeric codes to define I/O configurations and agency approvals. The 3500/25-01-01-00 configuration represents the most common industrial standard.
| Code | Option | Description |
| AA: 01 | Half-height I/O Module | Standard Internal Terminations |
| BB: 01 | I/O Module Type | Enhanced Keyphasor I/O with Internal Terminations |
| CC: 00 | Agency Approvals | None (Standard Non-Hazardous/General CE) |
Technical Specifications
| Parameter | Details |
| Channels | 2 Independent Keyphasor Channels |
| Input Signal | Proximity Probes or Magnetic Pickups |
| Frequency Range | 0.016 Hz to 100 kHz (up to 6,000,000 CPM) |
| Input Voltage | +24 V to -24 V Max |
| Timing Accuracy | 1 µs Resolution |
| Output Type | TTL-Compatible Conditioned Square Wave |
| Isolation | 250 Vrms Continuous |
| Operating Temp | 0°C to +65°C (32°F to 150°F) |
Engineering Advantages
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Vector Analysis Accuracy: The module offers 1-microsecond timing resolution, ensuring precise phase angle measurements. This eliminates jitter in vibration data, allowing for accurate Bode and Polar plots during machine startup and coast-down.
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Dual-Channel Versatility: Each 3500/25 module supports two independent inputs. This allows for multi-shaft monitoring or redundant Keyphasor configurations in a single rack slot.
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Universal Sensor Support: The module's flexible input circuitry accepts both active (Proximity) and passive (Magnetic Pickup) sensors without requiring external signal conditioners.
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Backplane Distribution: Once conditioned, the Keyphasor signal travels across the 3500 backplane. This allows any vibration monitor in the rack to "see" the phase reference without additional wiring.
FAQs
Q: Can the 3500/25 Enhanced Keyphasor module replace the older 3500/25 non-enhanced version?
A: Yes. The Enhanced Keyphasor Module is backward compatible and provides superior signal processing and expanded frequency ranges compared to the legacy version. However, ensure your Rack Interface Module (RIM) firmware supports the enhanced features.
Q: What is the maximum distance for the input sensor wiring?
A: Wiring distance typically depends on the sensor type. For standard proximity probes, you can run up to 300 meters (1,000 feet) using shielded twisted-pair cable, provided you maintain signal integrity and proper grounding at the 3500 rack.
Q: How do I configure the threshold and hysteresis for the input signal?
A: You define these parameters via the 3500 Rack Configuration Software. The software allows you to set specific trigger levels to ignore electrical noise while capturing the true shaft keyway or gear tooth passage.
Q: Does this module support "Multiple Events per Revolution"?
A: Yes. The Enhanced 3500/25 handles multi-tooth gears (up to 255 events per revolution) for high-resolution speed measurement, though standard phase reference typically utilizes a single event per turn.