Description
125800-01 | BENTLY NEVADA 3500/25 Enhanced Keyphasor Module
Product Overview
The Bently Nevada 125800-01 is the primary component part number for the 3500/25 Enhanced Keyphasor Module, a half-height, two-channel module utilized within the industry-standard Bently Nevada 3500 Machinery Protection System. This specialized card accepts input signals from proximity probes or magnetic pickups and translates them into digital phase and speed measurements (Keyphasor signals). These precise tracking metrics allow the 3500 rack to calculate accurate rotational speed, vector parameters, and synchronized vibration data, which are vital for structural health monitoring, predictive maintenance, and emergency trip protection on high-speed rotating machinery.
To source authentic protection components and maintain maximum uptime across your rotating assets, visit the Bently Nevada Machinery Protection portal.
Technical Specifications
- Manufacturer: Bently Nevada (Baker Hughes)
- Series: 3500 Series Machinery Protection System
- Model Keyword: BENTLY NEVADA 125800-01 3500/25 Keyphasor
- Module Type: Enhanced Keyphasor Module (Half-height)
- Dimensions: 12.0 cm x 2.4 cm x 24.1 cm
- Weight: 0.46 kg (1.01 lbs)
- Country of Origin: United States (USA)
- Signal Inputs: Accepts up to 2 single-channel inputs from proximity probes, magnetic pickups, or optical sensors
- Input Impedance: 20 k\Omega standard
- Signal Output range: Isolated outputs corresponding to rotational speed, phase angle, and pulse frequency
- Power Consumption: 3.2 Watts typical
BENTLY 125800-01 3500/25
BENTLY 125800-01 3500/25
BENTLY 125800-01 3500/25
BENTLY 125800-01 3500/25
Application Fields
The 125800-01 module is an essential asset for vibration analysis and machinery safety inside complex, heavy-duty industrial environments:
- Power Generation Plants: Phase monitoring and speed tracking on steam turbines, gas turbines, and massive generator rotors.
- Petrochemical Facilities: Continuous protection for high-speed centrifugal compressors, turboexpanders, and process pumps.
- Steel and Mining Mills: Structural health monitoring for large industrial blowers, ventilation fans, and motor-driven gearboxes.
- Maritime Propulsion: Monitoring main shaft dynamics and rotational speed sync for massive shipping vessels.
Product Installation and Usage Instructions
- Chassis Preparation: De-energize the specific section of the 3500 rack frame if local site safety protocols require it. Wear an anti-static ESD wrist strap securely connected to a verified ground point before opening the hardware package.
- Positioning the Module: The 3500/25 is a half-height card and must be installed into a designated half-height slot location. If utilizing a full-height slot, ensure the proper half-height chassis execution panel or guide sleeve is properly installed.
- Module Insertion: Align the card along the guide rails and push firmly inward until the backplane multi-pin interface pins are entirely mated with the main rack connector block.
- Hardware Fastening: Secure the hardware by hand-tightening the dual captive screws located on the module faceplate to avoid vibration-induced loose connections.
- Software Calibration: Fire up the 3500 Rack Configuration Software via your engineering workstation. Define input sensor parameters (e.g., threshold voltage, hysteresis, pulses per revolution) and verify the active Keyphasor diagnostic pulses through the system log.
Frequently Asked Questions (Q&A)
Q: What is the exact relationship between the part numbers 125800-01 and 3500/25?
A: 3500/25 is the general series/functional designation for the Keyphasor module framework, whereas 125800-01 represents the exact part number for the physical, main internal Enhanced Keyphasor Module circuit board component.
Q: Can a single 3500/25 module supply Keyphasor signals to multiple cards within the same 3500 rack?
A: Yes. The 3500 system architecture allows Keyphasor signals processed by the 125800-01 card to be distributed across the internal rack backplane to other monitoring cards (like 3500/42M or 3500/40M) that require phase-synchronized calculations.
Q: What is the main upgrade advantage of the “Enhanced” Keyphasor over older legacy versions?
A: The Enhanced variant (125800-01) provides superior processing capabilities, allows for multi-event pulses per revolution, and provides advanced internal self-tests to identify line breaks or sensor anomalies much faster.
Q: Does the 125800-01 package include the rear I/O module?
A: No. The 125800-01 specifically denotes the internal main control card. The rear I/O module (such as part number 125792-01 for standard I/O or 149369-01 for internal termination) must be paired and ordered separately based on your field wiring architecture.
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