The Bently Nevada 125800-01 is a Keyphasor I/O Module with internal terminations for the 3500/25 Enhanced Keyphasor system. It serves as the rear I/O card that works in conjunction with the 149369-01 Enhanced Keyphasor Module (main card), providing the physical connection interface for Keyphasor transducer inputs from proximity probes or magnetic pickups.
Item No :
125800-01Order(MOQ) :
1 PiecePayment :
EXW/CIFProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
3kg| Specification | Description |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Model | 125800-01 |
| Product Family | 3500/25 Enhanced Keyphasor System |
| Product Type | Keyphasor I/O Module (Internal Terminations) |
| Termination Type | Internal Terminations |
| Isolation | Non-isolated |
| Channel Capacity | Up to 2 transducer signals |
| Supported Transducers | Proximity probes or magnetic pickups |
| Input Signal Range | +0.8 V to -21.0 V |
| Input Impedance | 21.8 kΩ minimum |
| Input Frequency Range | 1 to 1,200,000 cpm (0.017 to 20 kHz) |
| Transducer Power Supply | -24 VDC, 40 mA max per channel |
| Buffered Outputs | 2 rear Keyphasor outputs (Euro Style connectors) |
| Buffered Output Impedance | 504Ω maximum |
| Rack Requirement | 1 full-height rear slot |
| Power Consumption | Typically 3.2W |
| Operating Temperature | -30°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 95%, non-condensing |
| Dimensions (H x W x D) | 241.3 mm x 24.4 mm x 103.1 mm |
| Weight | 0.46 kg (1.01 lb) |
| PWA Identification | 184389-01 |
| Country of Origin | USA |
| Lifecycle Status | Active / Available as New Surplus |
| Model | Description | Typical Application |
|---|---|---|
| 125800-01 (this model) | Keyphasor I/O Module (Internal Terminations) | Standard Keyphasor input termination, internal wiring |
| 125800-02 | Isolated Keyphasor I/O Module (Internal Terminations) | Designed for use with magnetic pickups; isolation for high-interference environments |
| 126648-01 | Keyphasor I/O Module (External Terminations) | Applications requiring external wiring access |
| 126648-02 | Isolated Keyphasor I/O Module (External Terminations) | Isolated version with external terminations |
| 135473-01 | Keyphasor I/O Module (Internal Barriers and Internal Terminations) | Hazardous area (Ex) applications requiring intrinsic safety barriers |
| 149369-01 | Enhanced Keyphasor Module (Main Card) | Companion front card for the 125800-01 I/O module |
| 125792-01 | Legacy Keyphasor Module (PWA) | Superseded by 149369-01 |
Q1: What is the primary function of the 125800-01?
It is a rear I/O module for the 3500/25 Enhanced Keyphasor system. It provides the physical termination for Keyphasor transducer inputs (proximity probes or magnetic pickups) and delivers buffered Keyphasor signal outputs at the rear of the rack. The module enables the 3500 system to measure shaft rotative speed and vector parameters such as 1X vibration amplitude and phase.
Q2: What is the difference between 125800-01 and 125800-02?
The 125800-01 is the non-isolated version with internal terminations. The 125800-02 is the isolated version with internal terminations, specifically designed for use with magnetic pickups where galvanic isolation is required to prevent ground loops and interference.
Q3: What is the difference between 125800-01 and 126648-01?
Both are non-isolated Keyphasor I/O modules. The 125800-01 provides internal terminations (field wiring connects inside the rack). The 126648-01 provides external terminations (field wiring connects outside the rack via terminal strips) .
Q4: Does the 125800-01 require a companion main card?
Yes. The 125800-01 is the rear I/O module that must be paired with the 149369-01 Enhanced Keyphasor Module (main card) to form a complete Keyphasor channel. The main card processes the signals, while the I/O module provides the physical connection interface.
Q5: How many Keyphasor modules can be used in a 3500 rack?
For a regular setup, the 3500 system can accept up to four Keyphasor signals. For a paired configuration (requiring two consecutive monitoring stations in upper/lower or two half-slot positions), the system can accept up to eight Keyphasor signals . In TMR (Triple Modular Redundant) applications, two Keyphasor modules are used to provide both primary and secondary signals.
The Bently Nevada 3500/60-01-00 is a 6-Channel Temperature Monitor for the 3500 Machinery Protection System. The complete configuration consists of the 163179-01 Temperature Monitor (main card) and the 133819-01 RTD/TC I/O Module with internal terminations.
The Bently Nevada 3500/53M-01-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System, configured with the 286566-01 Overspeed Detection main card and the 133396-01 Overspeed Detection I/O Module.
The Bently Nevada 3500/53M-01-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System. The 3500/53M is the split-base M-series version, using the 286566-01 main card with the 133396-01 rear I/O module. It is not drop-in compatible with the legacy 3500/53 (133388-01).
The Bently Nevada 3500/53M-01-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System. The 3500/53M is the split-base M-series version, using the 286566-01 main card with the 133396-01 rear I/O module. It is not drop-in compatible with the legacy 3500/53 (133388-01).
The Bently Nevada 3500/53-03-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System, configured with the 133388-01 Overspeed Detection main card and the 133396-01 Overspeed Detection I/O Module.
he Bently Nevada 288062-02 is the Tachometer Module main card for the 3500/50M Tachometer Module in the 3500 Machinery Protection System. It is a dual-channel module that accepts input from proximity probes or magnetic pickups to determine shaft rotational speed, rotor acceleration, and rotor direction.
The Bently Nevada 3500/50M-01-00 is a 2-Channel Tachometer Module for the 3500 Machinery Protection System, configured with the 288062-02 Tachometer main card and the 133442-01 I/O Module with internal terminations. The "M" designation indicates M-series functionality, providing enhanced integration with System 1 diagnostic software.
The Bently Nevada 133442-01 is a dual-channel Tachometer I/O Module with Internal Terminations, designed for the 3500/50 Tachometer Module in the 3500 Machinery Protection System. The module conditions raw pulse signals to determine shaft rotational speed, rotor acceleration, and rotor direction, and can supply conditioned Keyphasor signals to the rack backplane for use by other monitoring modules.
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