Bently Nevada 3500/25 Enhanced Key Phase Module (P/N 149369-01) is a professional equipment in the field of mechanical condition monitoring. As a key component of the 3500 mechanical protection system, it provides accurate key phase signals for the monitoring module. The module adopts half-height design and dual-channel configuration, which is completely the old system in backwards compatibility and can directly replace PWA 125792-01 module.
Second, the core functional characteristics

1. Signal processing ability
   Multi-event processing: Support multiple event signal processing per revolution, up to 20kHz.
   Signal conversion: convert the input signal close to the probe or magnetic pickup into the digital key phase signal.
   Intelligent threshold: It provides two working modes: automatic threshold (above 0.017Hz) and manual threshold (adjustable from 0 to -20V DC).
   Lag adjustment: the user can adjust the lag range from 0.2 to 2.5V
2. System integration characteristics
   Configuration flexibility: Support standard configuration (up to 4 key phase signals) and pairing configuration (up to 8 key phase signals).
   Redundancy design: TMR (Triple Module Redundancy) application needs to use two key phase modules to work in parallel.
   Isolation option: isolated I/O module version is available, which is suitable for situations where signals need to be isolated from the control system.
   III. Detailed explanation of technical specifications
3. Input characteristics
   Parameter specification
   Input type is close to probe or magnetic pickup.
   Input range non-isolated I/O: +0.8V to-21.0V.
   Isolated I/O: +5V to -11V
   Input impedance ≥ 21.8kω
   Minimum trigger amplitude automatic threshold: 2Vpp
   Manual threshold: 500mVpp
   Speed range is 1-1,200,000 CPM (0.017-20kHz).
4. Output characteristics
   Parameter specification
   Output interface front panel coaxial connector+rear panel European connector
   Output impedance ≤ 504Ω
   Power output-24 VDC, max 40mA per channel.
5. Performance indicators
   Parameter non-processing signal accuracy processing signal accurac