The Bently Nevada 3500/25 149369-01 Enhanced Keyphasor Module is a half-height, two-channel module used to provide Keyphasor signals to monitor modules within a 3500 rack. It converts input signals from proximity probes or magnetic pickups into digital Keyphasor signals, indicating precise shaft timing.
This Enhanced Keyphasor Module offers expanded signal processing capabilities compared to its predecessor (PWA 125792-01) while maintaining compatibility with existing systems using Keyphasor modules.
Specifications:
Inputs:
Accepts up to two transducer signals from proximity probes or magnetic pickups.
Input signal range: +0.8 V to -21.0 V (Non-Isolated I/O modules) or +5V to -11V (Isolated I/O modules).
Input impedance: Minimum 21.8 kΩ.
Signal Conditioning:
Input range: 1 to 1,200,000 cpm (0.017 to 20 kHz).
Output range: 1 to 99,999 cpm (0.017 to 1667 Hz).
Signal accuracy:
Non-processed signals:
0.017 to 100 Hz: ±1 cpm
101 to 500 Hz: ±8 cpm
501 to 20 kHz: ±1% of cpm
Processed signals:
0.017 to 60 Hz: ±1 cpm
61 to 150 Hz: ±8 cpm
151 to 20 kHz: ±1% of cpm
Outputs:
Two buffered Keyphasor outputs at the front of the rack via coaxial connectors.
Two buffered Keyphasor outputs at the back of the rack via Euro Style connectors.
Output impedance: Maximum 504 Ω.
Power:
Power consumption: 3.2 Watts typical.
Keyphasor transducer power supply: -24 Vdc, 40 mA maximum per channel.
Environmental Limits:
Operating temperature:
-30°C to +65°C (-22°F to +150°F).
Storage temperature: -40°C to +85°C (-40°F to +185°F).
