Description
Bently Nevada 3300/20-12-01 Dual Driver Monitor
TheBently Nevada 3300/20-12-01serves astheprimary3300/20Dual Driver Monitor utilized toexecutecontinuous dual-channel vibration and displacement signal conditioning across3300 proximity transducer monitoring systems. The module converts eddy-current probe inputs into calibrated vibration and axial position signals with relay-based alarm execution.
Cross-channel measurement processing is implemented using parallel analog conditioning paths for two independent proximity probe channels. Signal scaling is factory-defined via full-scale configuration (-12 option), mapping raw probe voltage into defined vibration amplitude ranges without field recalibration.
Suffix Breakdown & Model Matrix
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3300/20: Dual Driver Monitor base platform
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-12: Full-scale vibration range configuration (0 to 5 mils pp or calibrated metric equivalent)
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-01: Agency approval option (CSA / NRTL / Class I Division 2)
Hardware Specifications
| Parameter |
Specification |
| ModelBrand |
Bently Nevada 3300/20-12-01 |
| Origin |
USA |
| Weight |
1.0 kg |
| OperatingTemp |
0 degC to 65 degC |
| Input Type |
Dual proximity transducer (3300 / 7200 systems) |
| Input Impedance |
10 kOhm nominal |
| Output Signals |
4-20 mA or 1-5 VDC configurable |
| Alarm Outputs |
SPDT / DPDT relay (Alert / Danger) |
| Frequency Response |
10 Hz to 1 kHz (-3 dB) |
Eddy-Current Probe Scaling and Signal Conditioning Behavior
The 3300/20 platform applies fixed eddy-current probe scaling to convert shaft displacement into proportional electrical signals derived from proximity probe bias voltage variation. Cross-channel signal conditioning maintains independent processing of dual measurement paths, minimizing phase distortion during transient rotor dynamics. Gap-related DC offset tracking is maintained through continuous bias reference monitoring, ensuring stable axial displacement representation under steady-state and transient conditions.
Frequently Asked Questions
Q: Does the module support hot-swap replacement in an energized rack?
A: The module is not intended for energized insertion or removal. Backplane signal stability may be disrupted during live replacement.
Q: Are scaling parameters field adjustable?
A: No. Full-scale configuration is hardware-defined by the -12 option and not software reconfigurable.
Q: Can both channels share a single alarm relay output?
A: Alarm logic routing depends on internal jumper configuration, but channels remain electrically independent at input stage.
Field Installation Guidelines
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Install only into compatible 3300 rack slot with secure backplane engagement
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Maintain shield continuity for proximity probe coaxial cables
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Use single-point grounding to prevent loop current interference
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Route sensor cables away from high voltage conductors
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Verify relay contact wiring before system energization
