3500/25 149369-01 dedicated Keyphasor module

The BENTLY 3500/25 149369-01 is a dedicated Keyphasor module in Bently Nevada’s 3500 Series Rotating Machinery Protection & Monitoring System. As a core component for rotational parameter synchronization, it converts input signals from eddy current or electromagnetic sensors into high-precision digital Keyphasor signals. These signals mark the exact moment when a reference feature (e.g., a keyway or notch) on a rotating shaft passes a probe—enabling phase-aligned analysis of vibration, speed, and displacement data for rotating equipment (e.g., turbines, compressors, generators). The part number 149369-01 denotes a standardized configuration optimized for industrial scenarios requiring reliable phase synchronization, fully compatible with 3500 Series racks and M-type monitors. Below is its comprehensive detailed information:

I. Core Technical Parameters

Category	Specific Specifications
Basic Identification	- Model: 3500/25 (Keyphasor Module)- Part Number: 149369-01- Applicable System: Bently 3500 Series (compatible with 3500/10 single-frame and 3500/20 multi-frame racks)- Channel Configuration: 2 independent Keyphasor channels (isolated to avoid cross-interference)- Physical Form Factor: Half-height module (saves rack space, allows side-by-side installation with other half-height modules)
Input Characteristics	- Supported Sensor Types:- Eddy current proximity probes (e.g., Bently 3300XL 5mm/8mm/11mm, 7200 Series)- Passive electromagnetic (magnetic) pickups- Input Signal Range:- Non-isolated I/O: -0.8 V DC to -21.0 V DC- Isolated I/O (optional): +5 V DC to -11 V DC (internal clamping protects against overvoltage)- Input Impedance: Minimum 21.8 kΩ (minimizes signal attenuation from sensors)- Minimum Operating Speed:- Eddy current probes: 0 rpm (supports low-speed startup monitoring)- Magnetic pickups: >200 rpm (3.3 Hz, due to magnetic signal generation requirements)
Output Characteristics	- Keyphasor Outputs:- Front-panel: 2 coaxial connectors (BNC) for buffered Keyphasor signals (1:1 replication of processed input, for on-site verification with oscilloscopes)- Backplane: 2 Euro-style connectors (integrated with 3500 rack backplane, transmits signals to M-type monitors like 3500/42M, 3500/44M)- Output Impedance: Maximum 504 Ω (ensures stable signal transmission to downstream modules)- Output Logic Level: TTL-compatible (0 V = low, 5 V = high, compatible with 3500 Series digital signal processing)