Description
Bently Nevada 3300/50-02-02-00-00 Tachometer Monitor Module
Configured for rotational speed, acceleration, and zero-speed threshold measurement in Bently Nevada 3300 machinery monitoring system, the Bently Nevada 3300/50-02-02-00-00 (3300/50 Tachometer Monitor) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
-
3300/50: Tachometer Monitor module within 3300 monitoring platform
-
-02: Zero-speed tachometer measurement configuration
-
-02: Hermetically-sealed Alert/Danger relay output stage
-
-00: No agency certification option enabled
-
-00: No internal safety barrier configuration
Hardware Specifications
| Parameter |
Specification |
| ModelBrand |
Bently Nevada 3300/50-02-02-00-00 |
| Origin |
USA |
| Weight |
1.0 kg (approx.) |
| PowerConsumption |
2.5 W nominal |
| Input Channels |
2 transducer inputs with internal voting logic |
| Input Impedance |
10 kOhm nominal |
| Speed Range |
1 to 99,999 rpm |
| Zero-Speed Range |
< 100 rpm operation region |
| Output Signals |
4-20 mA, 0-10 VDC recorder outputs |
| Relay Output |
Hermetically-sealed Alert/Danger contacts |
| Accuracy |
+/-0.1 percent full scale |
Eddy-Current Probe Scaling and Cross-Talk Suppression Architecture
Signal processing logic is aligned with eddy-current proximity probe scaling conventions used in Bently Nevada 3300 systems, including gap voltage validation referenced to negative DC bias operating regions. Dual-input voting logic performs channel comparison to suppress cross-channel interference and reduce false triggering under unstable shaft harmonic conditions. Raw buffered outputs maintain isolation from conditioned signal paths to preserve diagnostic waveform integrity during external vibration analysis.
Frequently Asked Questions
Q: Can the module operate with a single transducer input?
A: Yes. The module supports dual inputs but can operate in single-channel mode. In this case, internal voting logic is bypassed for fault tolerance comparison.
Q: Are buffered outputs electrically isolated from relay outputs?
A: Buffered transducer outputs are separated from relay contacts through internal signal conditioning stages, preventing relay switching noise from coupling into diagnostic outputs.
Q: What happens if one transducer fails in dual-input configuration?
A: The internal voting logic evaluates discrepancy between channels and maintains output based on valid signal path, depending on configured fault thresholds.
Field Installation Guidelines
Shielded coaxial cabling is required for proximity probe and buffered signal paths. Cable shields should be grounded at a single-point earth reference to avoid ground loop formation. Relay output wiring must be segregated from low-level transducer signal lines to prevent inductive coupling. Ensure proper mating of front-panel coaxial connectors before energizing the module. Backplane insertion must be fully seated to maintain stable power and signal continuity.
