Configured for signal conditioning of eddy-current proximity probe measurements in Bently Nevada 3300 XL monitoring architecture, the Bently Nevada 330780-91-00 (3300 XL 11mm Proximity Sensor) provides direct physical/electrical execution.
The module conditions input from a single non-contacting 3300 XL 11 mm proximity probe and extension cable, converting displacement-dependent gap variation into a proportional voltage output for machine condition monitoring. Internal scaling is aligned with eddy-current probe linearization requirements, with sensitivity characteristics maintained under supply variation constraints.
Hardware Specifications
Parameter
Specification
Model
330780-91-00
Brand
Bently Nevada
Origin
USA
Weight
0.2 to 0.255 kg
Dimensions
8.8 x 3.6 x 7.1 cm (estimated shipping size)
OperatingTemp
-35 degC to +85 degC
StorageTemp
-51 degC to +100 degC
PowerConsumption
-17.5 Vdc to -26 Vdc, 12 mA max
Input Type
3300 XL 11 mm proximity probe + extension cable
Output Resistance
50 ohm
Supply Sensitivity
< 2 mV output change per 1 V input variation
System Length Option
9.0 m (29.5 ft), DIN mount (option 91)
Bently Nevada Eddy-Current Signal Conditioning Behavior
The 330780-91-00 integrates into rotor dynamics measurement chains where eddy-current probe gap voltage is mapped into calibrated displacement signals. Signal linearity is dependent on stable -23.5 Vdc to -26 Vdc operation window, where deviation can reduce effective linear range.
Cross-talk suppression is implemented through internal shielding reference design, minimizing induced noise between adjacent probe channels in multi-channel TSI installations. The proximitor stage ensures stable conversion of high-frequency probe oscillation into usable DC output proportional to shaft position.
Frequently Asked Questions
Q: Can the 330780-91-00 operate outside -23.5 Vdc supply range? A: Operation is possible, but reduced linear measurement range is observed due to internal scaling deviation.
Q: Does the module support multiple proximity probes simultaneously? A: No. The input stage is designed for a single 3300 XL 11 mm probe and corresponding extension cable only.
Q: What is the effect of supply voltage fluctuation on output signal? A: Output variation is limited to less than 2 mV per 1 V supply change under specified operating conditions.
Field Installation Guidelines
Install the proximitor module on a DIN rail mount structure with secure mechanical grounding to minimize EMI coupling. Maintain separation between probe signal cabling and high-power switching conductors to reduce induced noise. Ensure coaxial shielding continuity from probe to proximitor input termination without interruption. Verify correct negative DC supply polarity before energization. Cable routing should follow fixed tray segregation rules for low-level analog signals in TSI systems.
