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Phone: +86 16626708626Description
Key Technical Specifications
- Manufacturer: Bently Nevada
- Product No.: 3500/25-01-01-00
- Ordering number: 149369-01
- Module type: Enhanced Keyphasor Module
- Channels: 2
- Module height: Half-height (fits left-side half-height slots in 3500 rack)
- I/O module type: 01 = I/O module with internal terminations
- Input sources: Proximity probes or magnetic pickups
- Output: Digital Keyphasor signals for monitor modules
- Agency approval: 00 = Not required
- Dimensions: 25.65 cm × 2.44 cm × 11.99 cm
- Weight: 0.34 kg
- System compatibility: Bently Nevada 3500 machinery protection systemplcdcspro
Product Introduction
The Bently Nevada 3500/25-01-01-00 is an Enhanced Keyphasor Module for the 3500 machinery protection rack. It is a half-height, two-channel module that takes input from proximity probes or magnetic pickups and outputs digital Keyphasor signals to monitor modules in the rack.
Buyers select this module when they need accurate shaft timing for speed, 1X vibration, and phase measurements. The key points are the two-channel capability, internal terminations, and compatibility with the existing 3500 rack architecture.
- 3500/25-01-01-00
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No Keyphasor signal in monitor software | Missing input or wrong sensor wiring | ✅ High | Check sensor at the module terminals and verify probe gap or pickup mounting | Confirm sensor health first |
| RX/TX LEDs not lit | Power issue or module fault | ✅ High | Verify rack power and check module status LEDs | Replace the module if no power and LEDs stay off |
| Erratic speed or 1X vibration | Loose sensor, bad cable, or grounding issue | ✅ High | Inspect cable continuity, shield termination, and grounding | Rework installation before assuming module failure |
| Monitor reports Keyphasor fault | Wrong channel config or level set | ✅ High | Verify channel setup and input level in the monitor configuration | Check config before replacing hardware |
| OK LED off | Module not powered or internal fault | ✅ High | Confirm rack power and measure supply rails at the backplane | Test the rack power before replacing the module |
| Intermittent dropouts | Connector seating or backplane issue | ✅ Medium | Reseat the module and inspect connector pins | Check the backplane and seating first |
If you get stuck, contact technical support with photos of the module, the sensor wiring, and the monitor’s diagnostic buffer.
Frequently Asked Questions (FAQ)
Q: What does the 3500/25 module do?
A: It provides Keyphasor signals to monitor modules in the 3500 rack. Those signals are used for shaft speed, 1X vibration, and phase.
Q: Is this the “Enhanced” version?
A: Yes, the 3500/25 is the Enhanced Keyphasor Module. It improves Keyphasor signal processing compared with older versions.
Q: How many channels does it support?
A: The 3500/25-01-01-00 is a two-channel module. The rack can accept up to four Keyphasor signals in a normal configuration and up to eight in a paired configuration.
Q: What sensors can I use on it?
A: It accepts input from proximity probes or magnetic pickups. Make sure the sensor type and mounting match the site’s existing setup.
Q: Does it have internal terminations?
A: Yes, the 01 option is an I/O module with internal terminations. That is the common variant for new installs.
Q: Is it half-height?
A: Yes, it is a half-height module and fits in the left-side half-height slots of the 3500 rack.
Q: Can I hot-swap it in a live rack?
A: In a standard 3500 rack, I would not hot-swap a Keyphasor module unless the manual and rack setup allow it. Follow the approved procedure and power down if needed.
Q: Why is this often sold as surplus?
A: Because it is legacy hardware from project leftovers or retired systems. The price is lower, but condition and exact part number must be clear.
