Bently Nevada 3500/25 125800-01 Keyphasor I/O Module
A non-isolated internal-termination Keyphasor I/O module for a compatible 3500/25 main card.
Product Profile
3500/25 125800-01 is a non-isolated internal-termination Keyphasor I/O module for a compatible 3500/25 main card.
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.
Technical Data
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Part Number | 3500/25 125800-01 |
| Product Family | 3500/25 Enhanced Keyphasor |
| Product Type | Keyphasor I/O Module |
| Channels / Role | Two input channels with a compatible half-height main card |
| Termination / Interface | Internal |
| Isolation | Non-isolated |
| Input / Communication | Non-isolated input: +0.8 to -21.0 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 |
System Role
- Performs the documented keyphasor i/o module role in the 3500/25 Enhanced Keyphasor platform.
- Uses two input channels with a compatible half-height main card.
- Provides non-isolated input: +0.8 to -21.0 v.
- Uses internal connection or termination hardware.
- Maintains rack configuration traceability through the exact 3500/25 125800-01 identifier.
Compatibility
- Retain the non-isolated internal-termination arrangement and match the companion 3500/25 main card.
- Retain the internal arrangement and non-isolated requirement.
- Confirm two input channels with a compatible half-height main card and the connected monitoring-system configuration.
- Do not infer interchangeability from the 3500 family name alone; compare the complete part number and rack design.
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.
FAQ
What exactly is 3500/25 125800-01?
3500/25 125800-01: It is the non-isolated internal-termination Keyphasor I/O module.
Where does 3500/25 125800-01 operate in the 3500 system?
3500/25 125800-01: It accepts the documented non-isolated input range of +0.8 to -21.0 V.
What must be checked before fitting 3500/25 125800-01?
3500/25 125800-01: Match it with the correct 3500/25 main card and preserve the existing transducer wiring.
Which physical data applies to 3500/25 125800-01?
3500/25 125800-01 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 125800-01 automatically?
No. Confirm the exact 3500/25 125800-01 function, channel count, isolation, termination, approval and companion module before substitution.
What should be recorded during 3500/25 125800-01 commissioning?
Record rack slot, connected channels, wiring, configuration, alarm context and verification results for 3500/25 125800-01.
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