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Phone: +86 16626708626Description
3. Key Technical Specifications
- Channels: 4 (programmed in pairs)
- Power Consumption: 7.7 Watts typical
- Input Types: Proximity, velocity, acceleration transducers
- Input Impedance: 10 kΩ (standard I/O for Proximitor/acceleration)
- Sensitivity Options: 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil) for radial vibration
- Outputs: Buffered transducer signals, 4-20 mA recorder outputs
- Front Panel LEDs: OK, TX/RX, Bypass
- Operating Temperature: -30°C to +65°C
- Storage Temperature: -40°C to +85°C
- Humidity: 95% non-condensing
- Dimensions (Module): 241.3 mm x 24.4 mm x 241.8 mm
- Weight (Module): 0.91 kg (2.0 lbs)
4. Product Introduction
The Bently Nevada 3500-42M PWA176449-02V is a 4-channel Proximitor/Seismic Monitor for the 3500 machinery protection system. It accepts inputs from proximity probes and seismic transducers, conditions the signals, and drives alarms based on user-configured setpoints for parameters like radial vibration, thrust position, and velocity.
In field deployments on turbines, compressors, and pumps, this monitor provides reliable machinery protection and data to operators. Channels program in pairs for flexible configurations such as one pair for radial vibration and another for thrust. It integrates directly with the 3500 rack and System 1 software.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No OK LED | Power or backplane fault | ❌ Low | Measure power at module terminals | Check rack power supplies first |
| Bypass LED on | Channel in Bypass mode | ✅ Medium | Verify configuration in 3500 software | Exit Bypass mode after maintenance |
| No transducer signal | Wiring or probe failure | ✅ High | Check gap voltage at buffered output | Measure -24V supply and probe output |
| False alarms or erratic readings | Ground loop or improper shielding | ✅ High | Inspect field wiring for single-point grounding | Correct shielding; avoid ground loops |
| TX/RX LED issues | Rack comms problem | ❌ Low | Check TDI status and Ethernet | Focus on TDI or network first |
| Inaccurate vibration readings | Configuration mismatch | ✅ High | Compare settings to datasheet | Reload correct channel configuration |
Contact technical support with module LEDs status, configuration file, and transducer gap voltages if issues persist.
- 3500-42M PWA176449-02V
6. Frequently Asked Questions (FAQ)
What measurements can the 3500-42M PWA176449-02V perform? It supports radial vibration, thrust position, differential expansion, eccentricity, REBAM, acceleration, velocity, and shaft absolute. Channels program in pairs — one pair can handle radial vibration while the other does thrust, for example.
Is this module hot-swappable? No. Shut down the affected protection loops and rack power where required. Follow proper lockout/tagout procedures to avoid unintended trips or equipment damage.
What condition is this unit? New Original / New Surplus from OEM channels. Each unit undergoes visual inspection, power-on self-test in a 3500 rack, and signal simulation checks before shipping. Test reports available upon request.
How do I configure the channels? Use 3500 Rack Configuration Software. Document existing settings and photos of any jumpers before removal. Firmware and software versions must match your rack requirements.
Will this replace an older 3500/42 unit? Yes in most cases, but confirm firmware compatibility and I/O module type. Some advanced functions like REBAM require specific firmware revisions. Check bntechsupport.com for your exact setup.
What about wiring and grounding? Use proper shielded cable with single-point grounding to prevent loops. I’ve seen noise issues from double-ended shielding that caused false vibration alarms. Mirror the old module’s wiring exactly and verify transducer power (-24 Vdc).
What is the warranty and availability? Typically in stock with quick shipping. We offer a 1-year warranty covering functional performance. Photos, test videos, and traceability docs provided with each shipment.
