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Phone: +86 16626708626Description
3. Key Technical Specifications
- Module Type: Keyphasor I/O with Internal Terminations
- Compatibility: 3500/25 Enhanced Keyphasor Module
- Channels: Supports two Keyphasor channels
- Input Voltage Range: Typical proximity probe levels
- Buffered Outputs: Available at rear of rack
- Termination: Internal barriers/connections
- Dimensions: Approx. 24.2 cm x 11.2 cm x 2.5 cm
- Weight: Approx. 0.38 kg
- Operating Temperature: -30°C to +65°C (3500 series standard)
- Power: Supplied via 3500 rack backplane
4. Product Introduction
The Bently Nevada 125800-01 is the Keyphasor I/O Module with internal terminations for use with the 3500/25 Enhanced Keyphasor Module. It interfaces proximity probe signals to deliver precise phase reference (Keyphasor) data to all monitor modules in the 3500 rack.
This I/O module simplifies wiring with built-in terminations and supports buffered outputs for external use. In turbine and compressor systems, accurate Keyphasor signals enable speed measurement, order tracking, and phase analysis. Verify probe gap and configuration settings during installation to ensure reliable operation.
- 125800-01
- 125800-01
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No Keyphasor signal | Probe gap or wiring | ✅ High | Measure DC gap voltage at I/O terminals | Set probe gap to 8-12 VDC typical |
| Intermittent pulses | Dirty or damaged probe | ✅ High | Check signal waveform in software | Clean target or replace probe |
| Buffered output failure | Cabling issue | ✅ Medium | Measure output at rear Euro connectors | Verify external device impedance |
| Module not detected | Backplane connection | ✅ Low | Reseat module in rack | Check for bent pins or debris |
| Phase errors | Multiple probes conflict | ✅ Medium | Confirm single active Keyphasor per channel | Configure correct channel priority |
Gather rack configuration, probe gap readings, and waveform captures before contacting support.
6. Frequently Asked Questions (FAQ)
What is the 125800-01 used with? It pairs with the 3500/25 Enhanced Keyphasor Module to provide field wiring terminations and signal conditioning for proximity probes.
Does it support internal or external termination? This is the internal terminations version (-01). No external block required.
Can I hot-swap this I/O module? Yes, following 3500 hot-swap guidelines. Minimize downtime by preparing the replacement and configuration in advance.
How many Keyphasor channels does it handle? Two channels per I/O module. Multiple modules can be used in a single rack depending on system needs.
What probe types are compatible? Standard Bently Nevada proximity probes such as 3300 XL series. Maintain proper gap voltage for reliable pulse detection.
Why choose new surplus for this part? The 3500 platform remains widely deployed. Surplus units offer immediate availability versus potential long OEM lead times for spares.
What warranty is included? 1-year functional warranty. Units receive visual inspection, connection checks, and verification prior to shipment. Test documentation available on request.
