Bently Nevada 3500/25-01-01-00 – Enhanced Keyphasor Module | 3500 Series Machinery Protection Platform
Engineering Background: The Bently Nevada 3500 Series is the global standard for continuous online machinery protection in rotating equipment applications. Deployed across power generation, oil & gas, petrochemical, and heavy industrial facilities, the platform provides real-time vibration, position, and speed monitoring with SIL-rated trip logic. The 3500/25-01-01-00 Enhanced Keyphasor Module is a critical signal-conditioning component within this architecture, providing precise once-per-revolution phase reference signals that enable synchronous vibration analysis, balancing, and torsional measurements.
Product Positioning: The 3500/25-01-01-00 is engineered for procurement engineers and reliability teams requiring a drop-in, OEM-verified replacement or expansion module for existing 3500 Series racks. It accepts inputs from proximity probes, magnetic pickups, and optical sensors, and outputs conditioned Keyphasor signals to the rack backplane for use by all co-installed monitor modules. This module is essential for any 3500 rack performing phase-referenced vibration analysis or machinery balancing.
Complete Technical Specifications
- Part Number / SKU: 3500/25-01-01-00
- Series / Platform: Bently Nevada 3500 Machinery Protection System
- Module Type: Enhanced Keyphasor Module
- Input Channels: 2 independent Keyphasor inputs
- Accepted Sensor Types: Eddy-current proximity probes, magnetic pickups, optical sensors
- Input Voltage Range: –24 VDC nominal (3500 rack backplane powered)
- Signal Output: Conditioned Keyphasor signals to rack backplane (all co-installed monitors)
- Speed Range: 1 – 100,000 RPM (application dependent)
- Trigger Threshold: Adjustable, software-configurable via System 1 / Rack Configuration Software
- Communication: Rack backplane bus; compatible with 3500 Rack Interface Module (RIM)
- Approvals / Certifications: CE, CSA, FM (refer to OEM datasheet for current listing)
- Operating Temperature: 0°C to +65°C
- Humidity: 5% to 95% RH, non-condensing
- Form Factor: Standard 3500 Series single-slot module
- Weight: 340 g (approx.)
- Country of Origin: USA
Proven Application Environments
- Gas turbines and steam turbines (power generation)
- Centrifugal and axial compressors (oil & gas, petrochemical)
- Large pumps, fans, and blowers requiring phase-referenced vibration analysis
- Gearboxes and motor-driven equipment with torsional monitoring requirements
- Rotating machinery subject to API 670 machinery protection standards
- Facilities performing in-situ dynamic balancing
Engineering Advantages
- Dual-channel architecture: Two independent Keyphasor inputs allow simultaneous monitoring of two shaft reference points or redundant configurations.
- Enhanced signal conditioning: Improved noise immunity and wider input threshold range versus legacy 3500/25 variants, reducing nuisance trips in electrically noisy environments.
- Universal sensor compatibility: Accepts proximity probe, magnetic pickup, and optical sensor inputs without hardware modification.
- Backplane distribution: Conditioned Keyphasor signals are automatically distributed to all co-installed monitor modules, eliminating external wiring between modules.
- Software-configurable thresholds: Trigger levels set via Rack Configuration Software, enabling remote adjustment without physical access to the module.
- Hot-swap capable: Designed for insertion/removal under power in accordance with 3500 rack hot-swap procedures, minimizing process downtime.
System Architecture & Signal Flow
The 3500/25-01-01-00 occupies a dedicated slot in the 3500 Series rack. Field wiring from the Keyphasor sensor (proximity probe or pickup) connects to the module’s front-panel I/O terminals. The module conditions the raw sensor signal—performing threshold detection, noise filtering, and pulse shaping—and places the resulting clean Keyphasor pulse train on the rack backplane. All co-installed monitor modules (e.g., 3500/40M, 3500/42M, 3500/45) receive this reference signal for phase-angle computation, 1X/2X vector calculation, and synchronous averaging. Configuration is performed via the Bently Nevada Rack Configuration Software connected through the Rack Interface Module (RIM).
Sourcing & Quality Verification
- All units sourced from authorized distributors or verified surplus channels with documented chain of custody.
- Pre-shipment inspection includes visual examination, label verification (part number, revision, serial number), and functional bench test where applicable.
- Original OEM packaging preserved where available; anti-static packaging used for all shipments.
- Certificate of conformance (CoC) available upon request.
- Warranty: 90-day Konmask.com operational warranty against DOA/defective units.
Procurement Process
- Confirm part number 3500/25-01-01-00 against your rack configuration and BOM.
- Verify firmware/revision compatibility with your existing 3500 rack and System 1 software version.
- Submit RFQ or place order directly via Konmask.com product page.
- Receive order confirmation with lead time and shipping details within 1 business day.
- Shipment with packing list, CoC (on request), and tracking number provided.
Technical FAQ
Q: Is the 3500/25-01-01-00 compatible with all 3500 Series racks?
A: Yes. It is designed for the standard 3500 rack backplane and is compatible with all current 3500 Series rack configurations. Confirm slot assignment with your rack layout drawing.
Q: Can this module accept a magnetic pickup (MPU) input directly?
A: Yes. The Enhanced Keyphasor Module accepts proximity probes, magnetic pickups, and optical sensors. Input type is selected via software configuration.
Q: What is the difference between the standard 3500/25 and the 3500/25-01-01-00?
A: The -01-01-00 option code designates the Enhanced version with improved noise immunity, wider threshold range, and dual-channel input capability. Refer to the Bently Nevada 3500/25 datasheet (document 141536-01) for full option code definitions.
Q: Do you provide a Certificate of Conformance?
A: Yes, CoC is available upon request at time of order.
Q: What is the lead time?
A: In-stock units typically ship within 1–3 business days. Contact us for current availability.
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