Bently Nevada 125800-01

Bently Nevada 125800-01

Ordering Information

Enhanced Keyphasor Module

3500/25-AA-BB-CC

A: Number of channels

01 Single half-height 2-channel Keyphasor card (order for 2-channels)

02  Two half-height 2-channel Keyphasor cards (order for 4-Channels)

B: Type of I/O Module

01  I/O module with Internal Terminations

02  I/O module with External Terminations

03  Internal Barrier I/O with Internal Terminations

04  Isolated I/O module with Internal Terminations (Designed for use with Magnetic Pickups)

05  Isolated I/O module with External Terminations (Designed for use with Magnetic Pickups)

C: Agency Approval Option

00  Not required 01 cNRTLus (Class 1, Div 2)

02  ATEX/IECEx/CSA (Class 1 Zone 2)

Technical Parameters

Channels:

2 × proximity-probe (eddy-current) speed inputs (0–50 V p-p)

2 × TTL/CMOS keyphasor or encoder-index inputs

Internal Terminations:

1 kΩ probe termination resistors

100 Ω pull-up for TTL/CMOS channels

Speed Range:

0.1 Hz to 20 kHz (probe); up to 50 kHz encoder

Signal Conditioning:

Automatic probe-gain compensation

Overvoltage clamp to ± 35 V

Reverse-polarity protection

Resolution & Timing:

1 µs timestamp for each index pulse with Bently Nevada 136180-01

Isolation:

≥ 1 kV channel-to-chassis ground

Data Output:

Time-stamped digital words over 3500 backplane bus

Power Consumption:

24 V DC via backplane, ≤ 4 W

Environmental:

Operating Temp: 0 °C to +70 °C

Storage Temp: –40 °C to +85 °C

Humidity: ≤ 95 % RH, non-condensing

Product function

Speed & Phase Detection:

Conditions eddy-current probe signals to compute real-time RPM using Bently Nevada 136180-01.

Keyphasor Timing:

Detects once-per-rev markers or encoder-index pulses with microsecond accuracy.

Overspeed Protection:

Feeds speed data into hardware trip logic via system interface.

Synchronization & Phasing:

Supplies precise shaft-angle information for parallel operations and phasor matching.

Integrated Terminations:

On-board resistors eliminate external termination hardware.

Application Areas

Turbine Overspeed & Synch-Check:

Generators and turbines requiring rapid trip and phasor alignment.

Compressor Surge Control:

Real-time speed feedback from Bently Nevada 136180-01 for stability control algorithms.

Marine & Turboshaft Engines:

High-precision timing in demanding vibration conditions.

OEM Skid Packages:

Compact modules in packaged equipment needing minimal wiring.

Sequence-of-Events Logging:

Time-stamped event capture for diagnostics using Bently Nevada 136180-01.