Rear-slot non-isolated internal-termination I/O module for the 3500/25 Enhanced Keyphasor monitoring function.
The Bently Nevada 3500/25 125800-01 is the Keyphasor I/O module with internal terminations specified for the 3500/25 Enhanced Keyphasor Module. It occupies one full-height rear slot and interfaces the rack with proximity-probe or magnetic-pickup phase reference signals through the 3500/25 system architecture. The associated Keyphasor module accepts up to two transducer signals and supports speed, phase and multiple-event-per-revolution processing. This non-isolated I/O variant must be distinguished from the isolated 125800-02 version and from external-termination configurations before installation or spare-part procurement.
Condition, availability and warranty are Stockoems commercial terms, not manufacturer commitments.
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Complete Part Number | 3500/25 125800-01 |
| Manufacturer Part Number | 125800-01 |
| Product Type | Keyphasor I/O Module with Internal Terminations |
| Series | 3500/25 Enhanced Keyphasor Module |
| Isolation | Non-isolated I/O version |
| Associated Channels | Up to two transducer signals per Keyphasor module |
| Non-Isolated Input Range | +0.8 V to -21.0 V |
| Input Impedance | 21.8 kΩ minimum |
| Frequency Input Range | 0.017 Hz to 20 kHz |
| Transducer Power | -24 Vdc, 40 mA maximum per channel |
| Operating Temperature | -30°C to +65°C (-22°F to +150°F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Humidity | 95%, non-condensing |
| I/O Module Dimensions | 241.3 x 24.4 x 103.1 mm (H x W x D) |
| I/O Module Weight | 0.46 kg (1.01 lb) |
| Rack Space | One full-height rear slot |
| Country of Origin | USA |
What is 125800-01?
It is the non-isolated Keyphasor I/O module with internal terminations listed for the 3500/25.
How many signals can the associated module accept?
Each 3500/25 Keyphasor module accepts up to two transducer signals.
Can external termination blocks be used with this I/O module?
No. The manufacturer states that external termination blocks cannot be used with internal-termination I/O modules.
Is 125800-01 an isolated version?
No. The isolated internal-termination version designed for magnetic pickups is 125800-02.
Where is the I/O module installed?
It occupies one full-height rear rack slot corresponding to the 3500/25 module.
What should be verified before wiring?
Confirm sensor type, isolation requirement, terminal arrangement, rack revision and complete part number.
Confirm that the installation requires the non-isolated 125800-01 internal-termination version. Do not substitute the isolated 125800-02 or any external-termination I/O solely on family similarity. Match the sensor type, isolation requirement, terminal arrangement, rack revision and complete part number before wiring.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Email: sales6@apterpower.com WhatsApp: +86 18159889985
Documented checks from suffix verification through after-sales response.
How can direct users identify a qualified automation supplier?
Ask for exact model and suffix checks, current product photos, visible label details, written condition terms and a traceable quotation. A qualified supplier separates manufacturer facts from its own commercial commitments.
What should procurement teams verify before issuing a purchase order?
Match the manufacturer, complete part number, revision, quantity, condition, warranty wording, delivery destination and return authorization process. The quotation should not substitute a similar model without written approval.
What should engineers request for compatibility review?
Provide rack or controller type, installed hardware revisions, firmware or software environment, connector requirements and product-label photos. Compatibility decisions should be based on exact configuration data.
Which warning signs indicate supplier risk?
Common risks include altered suffixes, stock photos presented as actual inventory, unsupported technical claims, refusal to provide label photos, vague warranty wording, unverifiable company details and pressure to accept an unapproved substitute.
How should stock claims be evaluated?
Request current product and label photos linked to the quotation. Do not rely on an unexplained inventory number or a generic availability statement alone.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Email: sales6@apterpower.com WhatsApp: +86 18159889985
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Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Email: sales6@apterpower.com WhatsApp: +86 18159889985
