Description
The 3500/42M 176449-02 is a high-performance, four-channel machinery protection monitor designed for the Bently Nevada 3500 Series Rack. It provides continuous, real-time monitoring of both proximity and seismic sensors to detect vibration, eccentricity, and thrust position in critical rotating machinery. By processing signals from transducers like the 3300 XL Proximitor series and various accelerometers, this module ensures early fault detection and automatic shutdown capabilities to prevent catastrophic equipment failure.
Technical Specifications
| Feature | Specification |
| Model Number | 3500/42M |
| Part Number | 176449-02 |
| Input Signals | Proximity, Seismic, and Velocity transducers |
| Channel Count | 4 independently programmable channels |
| Signal Processing | Integrated Proximitor/Seismic (M Series) |
| A/D Conversion | 24-bit resolution |
| Accuracy | Within ±0.33% of full-scale typical |
| Frequency Response | 0.5 Hz to 30 kHz (Filter dependent) |
| Operating Temperature | -30°C to +65°C (-22°F to +150°F) |
| I/O Termination | Internal or External Termination Blocks |
This module stands as a versatile solution for industrial vibration analysis, offering superior signal conditioning and programmable alarm setpoints that integrate seamlessly into the 3500 rack’s backplane for high-speed data communication.
Comparison with Similar Models
While the 3500/42M is the standard for displacement and vibration, it is often compared to these specialized modules:
- 3500/42M vs. 3500/40M (Proximity Monitor): The 40M is strictly focused on proximity (displacement) sensors. The 42M is more versatile because it can handle both proximity and seismic (velocity/acceleration) inputs on the same module, allowing for a mix of sensor types.
- 3500/42M vs. 3500/45 (Position Monitor): The 45 is dedicated to slow-moving DC position measurements like valve position or case expansion. The 42M is designed for high-frequency dynamic vibration and axial thrust measurements.
- 176449-02 vs. 128229-01: These represent different versions of the I/O modules. The 176449-02 specifically denotes the Proximitor/Seismic I/O module with internal terminations and proximitor sensors supported, whereas older I/O versions may lack the updated surge protection or specific transducer power configurations found in the 176449-02 revision.
