Rear-slot isolated internal-termination I/O module designed for magnetic pickups in the 3500/25 Keyphasor system.
The Bently Nevada 3500/25 125800-02 is the isolated Keyphasor I/O module with internal terminations designed for magnetic pickups. It is specified for use with the 3500/25 Enhanced Keyphasor Module and occupies one full-height rear slot. The associated Keyphasor module accepts up to two transducer signals and supports speed, phase and multiple-event-per-revolution processing. The isolated I/O provides a different input range and introduces a documented phase shift compared with the non-isolated version, so sensor type, speed range, wiring arrangement and exact suffix must be reviewed before installation.
Condition, availability and warranty are Stockoems commercial terms, not manufacturer commitments.
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Complete Part Number | 3500/25 125800-02 |
| Manufacturer Part Number | 125800-02 |
| Product Type | Isolated Keyphasor I/O Module with Internal Terminations |
| Series | 3500/25 Enhanced Keyphasor Module |
| Designed Sensor Type | Magnetic pickups |
| Associated Channels | Up to two transducer signals per Keyphasor module |
| Isolated Input Range | +5 V to -11 V |
| Input Impedance | 21.8 kΩ minimum |
| Frequency Input Range | 0.017 Hz to 20 kHz |
| Passive Pickup Requirement | Shaft speed greater than 200 rpm (3.3 Hz) |
| 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 125800-02?
It is the isolated Keyphasor I/O module with internal terminations designed for magnetic pickups.
What input range applies to the isolated I/O?
The official specification states an isolated input range of +5 V to -11 V.
What speed is required for passive magnetic pickups?
The manufacturer specifies shaft speed greater than 200 rpm, or 3.3 Hz.
Can external termination blocks be used?
No. External termination blocks cannot be used with internal-termination I/O modules.
Is it interchangeable with 125800-01?
No automatic interchange should be assumed; 125800-01 is the non-isolated internal-termination version.
What should be verified before wiring?
Confirm magnetic-pickup characteristics, isolation need, speed range, terminals, rack revision and exact part number.
Confirm that the installation requires isolated 125800-02 for magnetic-pickup use. The manufacturer notes that isolated I/O modules add a phase shift compared with non-isolated versions. Do not substitute 125800-01 or an external-termination module without reviewing the sensor, speed range, isolation requirement, terminal arrangement and rack configuration.
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
