Bently Nevada 176449-02 3500/42M Proximitor/Seismic Monitor
The Bently Nevada 176449-02 is a proximitor/seismic monitor for the Bently Nevada 3500 Series machinery protection platform. Function: Monitors and protects critical machinery by accepting signals from proximity and seismic transducers. | Input Types: Velocity, acceleration, displacement, proximity, speed, torque | Input Range: 4-20 mA, 0-10 V, ±10 V. Factory-sealed, tested on live rack with 48-hour burn-in. 12-month warranty. Ships within 24 hours.
Technical Specifications
| Model | Bently Nevada 3500/42M |
|---|---|
| Part Number | 176449-02 |
| Function | Monitors and protects critical machinery by accepting signals from proximity and seismic transducers. |
| Input Types | Velocity, acceleration, displacement, proximity, speed, torque |
| Input Range | 4-20 mA, 0-10 V, ±10 V |
| Accuracy | ±0.5% |
| Sampling Rate | Up to 10 kHz |
| Output | 4-20 mA, RS-485 |
| Power Supply | 24 VDC |
| Operating Temperature | -40 to 85 °C |
| Enclosure Rating | IP66 |
| Monitoring Functionality | Accepts signals from proximity and seismic transducers for effective monitoring. |
| Conditioning Capabilities | Provides accurate vibration and position measurements for enhanced performance. |
| Alarm System | Compares incoming signals with user-programmable alarms for effective anomaly detection. |
| Versatility | Supports various functions, including radial vibration and thrust position monitoring. |
| Setup | Includes internal terminations for a flexible and customizable setup. |
| Manufacturer | Bently Nevada |
| Model / SKU | 176449-02 |
✓ Ships within 24 hours | ✓ 12-Month Warranty | ✓ Worldwide Delivery
Detailed Product Information
🎯 Monitoring Function & Protection Role
The Bently Nevada 176449-02 is a dedicated monitoring module within the 3500 Series rack. It continuously measures critical machinery parameters and provides relay outputs for alarm and shutdown protection per API 670. Unlike general-purpose I/O, monitor modules implement signal conditioning, filtering, and threshold comparison directly in hardware — ensuring protection response times under 100 milliseconds even if the rack communication is interrupted.
What It Monitors
- Vibration Monitors: Accept Proximitor inputs, extract peak-to-peak amplitude, compare against programmable alarm/danger setpoints.
- Position Monitors: Measure DC gap voltage for thrust position, differential expansion, and rod drop on reciprocating compressors.
- Temperature Monitors: Accept RTD and thermocouple inputs for bearing metal and case temperature monitoring.
- Tachometer/Speed: Accept magnetic pickup or proximity probe inputs for rotational speed and zero-speed detection.
Setpoint Configuration
Alarm and danger setpoints should be established based on ISO 10816 or API vibration standards for your specific machine type. Always document setpoint rationale — during an incident investigation, you will need to justify why the machine tripped (or didn't trip) at a given threshold.
🔧 Technical Specifications & Calibration
Specifications
| Parameter | Value |
|---|---|
| Model | Bently Nevada 3500/42M |
| Part Number | 176449-02 |
| Function | Monitors and protects critical machinery by accepting signals from proximity and seismic transducers. |
| Input Types | Velocity, acceleration, displacement, proximity, speed, torque |
| Input Range | 4-20 mA, 0-10 V, ±10 V |
| Accuracy | ±0.5% |
| Sampling Rate | Up to 10 kHz |
| Output | 4-20 mA, RS-485 |
Calibration & Verification
- Use a calibrated signal source (TK-3 for vibration, decade box for temperature) to inject known test signals.
- Verify the module's front-panel reading matches the injected signal within ±1% of full scale.
- Force each alarm and danger relay by temporarily lowering setpoints below current readings — verify DCS annunciation and trip logic.
- Document all calibration values and relay test results in your maintenance management system.
📦 Shipping & Warranty
24-hour handling. Anti-static packaging. DHL/FedEx/UPS worldwide. 12-month warranty covering component failure, calibration drift, relay failure.
❓ FAQ
Q: How often should monitor modules be calibrated?
A: Bently Nevada recommends annual calibration verification. For SIL-rated safety loops, verify every 6 months per IEC 61511.
Q: Can I hot-swap a monitor module?
A: No. The 3500 rack monitors are NOT hot-swappable. Power down the rack, replace the module, reconfigure if needed, power up, and verify.
Q: My monitor shows OK but the relay doesn't trip during test?
A: Check: (1) Relay module installed in correct slot; (2) Monitor-to-relay channel mapping in Rack Configuration Software; (3) Relay module STATUS LED — if amber, the relay module itself may be faulty.
💰 Protection ROI
This monitor module is the last line of defense between normal operation and catastrophic machine failure. One avoided bearing wipe on a 50 MW turbine saves $500,000+ in repairs and 4+ weeks of downtime. The monitor cost is recovered in the first detected incident — often within months of commissioning.
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