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Module Bently Nevada 3500/25-01-03-RU completed wth 149369-01,135473-01
Module Bently Nevada 3500/25-01-03-RU completed wth 149369-01,135473-01
Digital Timing Reference Enhanced Keyphasor Module
Internal Termination 3500/25 Module
Phase-Locked Measurements Bently Nevada Keyphasor
Place of Origin:
USA
Brand Name:
Bently Nevada
Model Number:
3500/25-01-03-RU (149369-01,135473-01)
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Product Details
Product Model:
3500/25-01-03-RU (149369-01,135473-01)
Country Of Origin:
USA
Estimated Shipping Size:
2.5x25.7x12cm
Manufacturer:
Bently Nevada
Weight:
0.34 Kg
Operating Temperature:
-30°C To +65°C(-22°F To +150°F)
Storage Temperature:
-40°C To +85°C(-40°F To +185°F)
Humidity:
95%, Non-condensing
Highlight:
Digital Timing Reference Enhanced Keyphasor Module
,Internal Termination 3500/25 Module
,Phase-Locked Measurements Bently Nevada Keyphasor
Payment & Shipping Terms
Minimum Order Quantity
1
Price
66USD
Packaging Details
Brand new and original
Delivery Time
2-3 work days
Payment Terms
T/T
Supply Ability
in stock
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Product Description
The 149369-01 serves as the digital processing core of the 3500/25 Enhanced Keyphasor system. Unlike standard vibration monitors, this specialized board does not measure vibration magnitude. Instead, it converts raw once-per-turn pulses from proximity probes or magnetic pickups into a precise digital timing reference. This synchronized "clock" signal is broadcast across the 3500 rack's backplane, enabling all other monitor cards in the system—including seismic, position, and casing monitors—to perform synchronous data sampling. This hardware-level synchronization is essential for correlating vibration peaks with actual shaft orientation, forming the foundation for all phase-locked measurements in industrial machinery protection.
Field wiring and signal conditioning are managed by the 135473-01 I/O module. The RU (Internal Termination) version eliminates the requirement for external resistors when connecting field cables. The hardware includes manual adjustment capabilities for threshold and hysteresis levels, providing primary defense against "double-triggering" caused by mechanical runout or EMI noise on the shaft. Front-panel buffered BNC connectors allow field engineers to connect portable vibration analyzers to the raw Keyphasor signal without compromising circuit impedance or risking nuisance trips in the protection system.
In diagnostic applications, the 3500/25-01-03-RU is the essential hardware component for generating Bode and Polar plots within Bently Nevada's System 1 software. By tracking phase-shift and RPM during machine transients—particularly during startup and coast-down operations—the system can identify mechanical faults such as unbalance, rotor bow, or structural resonance. It provides the critical "zero-point" reference needed for shaft centerline tracking and orbit analysis. Without the stable phase lock provided by this module, Root Cause Analysis (RCA) on high-speed turbines or compressors would be impossible, as there would be no method to differentiate between synchronous and non-synchronous vibration patterns.
Technical Specifications & Field Applications
Signal Logic: Why does the 149369-01 ignore vibration magnitude?
The 149369-01 functions as a pulse-to-timing converter rather than a vibration monitor. Its primary purpose is to identify specific voltage trigger points from proximity probes—typically the notch or keyway—to establish a "zero-degree" shaft reference. It transforms raw analog peaks into a digital clock signal distributed across the rack backplane, synchronizing sampling for all seismic and position modules.
Wiring Architecture: What is the practical advantage of the "RU" (135473-01) I/O version?
The "RU" suffix indicates Internal Termination, eliminating the need for external resistor blocks when connecting proximity probe field wiring. The 135473-01 manages signal intake and grounding internally, significantly reducing cabinet clutter and potential failure points in the transducer-to-rack loop.
Troubleshooting: How do I mitigate "double-triggering" on a scarred shaft?
Utilize the module's manual threshold and hysteresis adjustments. When mechanical runout or surface scratches create "ghost" pulses, increasing hysteresis prevents the 149369-01 from triggering on minor voltage fluctuations, ensuring the timing reference only registers the actual keyway and maintains RPM and phase angle data integrity.
Field Testing: Can I connect a portable analyzer without tripping the machine?
Yes, through the front-panel buffered BNC connectors. These ports are electronically isolated from the primary protection loop, allowing connection of Scopemeters or dynamic signal analyzers to the raw Keyphasor pulse without dropping circuit impedance or introducing noise that could disrupt the 3500/25 phase lock.
Diagnostic Value: Why is the 3500/25 required for "Phase-Locked" orbit analysis?
Without the Keyphasor signal, vibration monitors operate asynchronously—detecting "how much" vibration occurs but not "where" it originates. The 3500/25-01-03-RU provides the timing trigger necessary to correlate vibration peaks with shaft orientation, enabling generation of orbits, Bode plots, and Polar plots in System 1 for identifying unbalance or rotor bow conditions.
System Integration: What happens to the rack monitors if the 149369-01 fails?
Monitors will continue providing magnitude protection (overall vibration levels), but all synchronous data will be lost. Monitors revert to asynchronous sampling, and any phase-dependent alarms or diagnostic plots in System 1 become invalid. The rack maintains basic safety trip functionality while losing complex diagnostic capabilities.
Input Versatility: Can this module handle magnetic pickups for high-speed turbines?
Yes. The 135473-01 I/O is compatible with both Proximitor (eddy current) probes and passive magnetic pickups. For high-speed applications, the module's high-frequency pulse train processing ensures accurate RPM tracking during rapid thermal transients in machine startup or trip scenarios.
Data Logic: How does the Keyphasor assist in Root Cause Analysis (RCA)?
The Keyphasor distinguishes between observing a vibration spike and understanding its cause. By tracking phase-shift, it informs engineers whether a spike results from structural resonance (critical speed) or sudden mechanical shifts (such as lost blades). It provides the "zero-point" baseline essential for transient data comparison.
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- Honeywell / ABB / AB - Modules & Touch Screens
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- Yokogawa / Yaskawa - Transmitters & Servo Motors
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- Condition: Brand New & Factory Sealed
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