Products Description
The Bently Nevada 125800‑01 is a half‑height dual‑channel Keyphasor module for the 3500 protection system. It takes signals from proximity probes or magnetic pickups to output precise timing data for shaft speed, phase and vibration analysis.
Suitable for turbines, compressors and generators, it handles single‑turn and multi‑turn pulse inputs. It retains full backward compatibility and supports TMR redundant operation to improve system uptime.
Key Features
Dual‑Channel Keyphasor Reference
Two independent input channels generate accurate shaft timing signals for the 3500 protection system.
Flexible Sensor & Pulse Support
Works with proximity probes and magnetic pickups, handling both once‑per‑turn and multi‑event pulses.
Enhanced Diagnostic Performance
Improved signal processing enables reliable calculation of 1X vibration, phase angle and rotational speed.
High Compatibility & TMR Ready
Drop‑in backward‑compatible fit for 3500 racks; supports dual‑module TMR redundant operation.
Technical Specifications
Model: 125800‑01
Brand: Bently Nevada
Series: 3500 System, 2‑Channel Enhanced Keyphasor I/O Module (internal terminations)
Mechanical: 24.2 × 11.2 × 2.5 cm, 0.38 kg
Operating Temp: 0°C ~ +65°C
Storage Temp: ‑40°C ~ +85°C
Humidity: 95% non‑condensing
Made in: USA
Configuration: Supports paired multi‑module setups for multi‑Keyphasor input requirements
Contact Us
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Application Areas
Gas & Steam Turbine Monitoring
Supply timing reference for high‑speed turbine condition monitoring and fault diagnosis.
Compressor Protection
Support speed and phase measurement for industrial and pipeline compressors.
Generator & Motor Condition Analysis
Provide key phase signals for rotating electrical equipment vibration analysis.
High‑reliability Safety‑critical Systems
Deliver redundant timing signals for TMR‑based machinery protection setups.
About PLC Export
Why choose us?
PLC Export supplies worldwide industrial automation equipment and spare parts. We stock PLC, HMI, drive and module parts for modern and legacy systems. Every item is fully inspected before delivery. Relying on global sourcing and efficient logistics, we help clients lower maintenance expenses and sustain stable production.
FAQ
Q: What is the Bently Nevada 125800-01 Enhanced Keyphasor Module used for?
A:The Bently Nevada 125800-01 Enhanced Keyphasor Module provides precise shaft timing reference signals for the 3500 Machinery Protection System. It converts signals from proximity probes or magnetic pickups into digital Keyphasor® signals, enabling accurate measurement of shaft speed, vibration phase, and rotational position.
Q: Is the 125800-01 a sensor or a transducer?
A: No. The 125800-01 is not a sensor or a transducer. It is a two-channel Keyphasor module installed in a 3500 rack. The module receives signals from external proximity probes or magnetic pickup sensors and processes them into digital Keyphasor reference signals for other 3500 monitoring modules.
Q: What types of input devices are compatible with the 125800-01?
A: The module accepts input from eddy current proximity probes and magnetic pickup sensors. These devices detect shaft timing marks or gear teeth, while the 125800-01 processes the signals for machinery protection and diagnostic applications.
Q: Does the 125800-01 support redundant machinery protection systems?
A: Yes. For Triple Modular Redundancy (TMR) applications, the 3500 system can use two Enhanced Keyphasor Modules operating in parallel. This configuration provides both primary and secondary Keyphasor signals, improving system availability and reliability in critical machinery protection systems.
Q: Is the 125800-01 compatible with older Bently Nevada 3500 systems?
A: Yes. The 125800-01 Enhanced Keyphasor Module is designed with complete form, fit, and function compatibility for existing 3500 Keyphasor modules. It offers enhanced signal processing capabilities while allowing seamless replacement and integration into legacy Bently Nevada 3500 Machinery Protection Systems without requiring system modifications.
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