Bently Nevada 3500/25 125800-02 Isolated Keyphasor I/O Module
An isolated internal-termination Keyphasor I/O module designed primarily for magnetic-pickup inputs.
Overview
3500/25 125800-02 is an isolated internal-termination Keyphasor I/O module designed primarily for magnetic-pickup inputs.
Its exact part identity determines the installed function, channel arrangement, termination method and companion hardware. These details should be verified against the rack before replacement.
Specs
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Part Number | 3500/25 125800-02 |
| Product Family | 3500/25 Enhanced Keyphasor |
| Product Type | Isolated Keyphasor I/O Module |
| Channels / Role | Two input channels with a compatible half-height main card |
| Termination / Interface | Internal |
| Isolation | Isolated |
| Input / Communication | Isolated input: +5 to -11 V |
| Supply / Consumption | -24 Vdc, 40 mA maximum per channel |
| Operating Temperature | -30 to +65 °C |
| Storage Temperature | -40 to +85 °C |
| Relative Humidity | 95%, non-condensing |
Features
- Performs the documented isolated keyphasor i/o module role in the 3500/25 Enhanced Keyphasor platform.
- Uses two input channels with a compatible half-height main card.
- Provides isolated input: +5 to -11 v.
- Uses internal connection or termination hardware.
- Maintains rack configuration traceability through the exact 3500/25 125800-02 identifier.
Applications
- Shaft-speed and phase-reference measurement in rotating machinery.
- Keyphasor event processing for compatible 3500 monitoring channels.
- Machinery-protection racks requiring the documented isolation and termination arrangement.
- Maintenance replacement where channel assignments and transducer type are retained.
Lifecycle
- Match with the correct 3500/25 main card and verify the magnetic-pickup loop before exchange.
- Record rack slot, companion I/O or main module, wiring and channel configuration before removal.
- Verify firmware, software access, alarms and channel response after installation.
- Follow the machinery protection bypass, isolation and return-to-service procedure.
FAQ
What exactly is 3500/25 125800-02?
3500/25 125800-02: It is the isolated internal-termination I/O module, intended primarily for magnetic-pickup inputs.
Where does 3500/25 125800-02 operate in the 3500 system?
3500/25 125800-02: A compatible 3500/25 half-height main card and the correct magnetic-pickup loop are required.
What must be checked before fitting 3500/25 125800-02?
3500/25 125800-02: A Proximitor Sensor requires an external power supply with this isolated I/O design.
Which physical data applies to 3500/25 125800-02?
3500/25 125800-02 has documented dimensions of 241.3 × 24.4 × 103.1 mm and a weight of 0.46 kg.
Can a similar 3500 part replace 3500/25 125800-02 automatically?
No. Confirm the exact 3500/25 125800-02 function, channel count, isolation, termination, approval and companion module before substitution.
What should be recorded during 3500/25 125800-02 commissioning?
Record rack slot, connected channels, wiring, configuration, alarm context and verification results for 3500/25 125800-02.
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