Product Details
The Bently Nevada 330780-51-CN serves as the primary 330780 Proximitor Sensor utilized to execute non-contacting shaft displacement and vibration measurements across 3300 XL machinery monitoring platforms.
Suffix Breakdown & Model Matrix
| Option Field | Code | Configuration Detail |
|---|---|---|
| Total Length and Mounting Option | 51 | 5.0 meter (16.4 feet) system length, DIN-rail mount configuration |
| Agency Approval Option | CN | ATEX/IECEx and Chinese NEPSI hazardous area approvals |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330780-51-CN |
| Brand | Bently Nevada |
| Origin | USA |
| Weight | 0.25 kg |
| Dimensions | 81 mm x 61 mm x 50 mm (standard DIN-rail enclosure) |
| Operating Temp | -35 deg C to +65 deg C (-31 deg F to +149 deg F) |
| Power Consumption | -17.5 VDC to -26 VDC (-24 VDC nominal), 12 mA maximum current draw |
| System Length | 5.0 meters (16.4 feet) calibrated system |
| Mounting Type | 35 mm DIN-rail mount |
| Agency Approvals | ATEX/IECEx, Chinese NEPSI (CN option) |
| Output Scale Factor | 3.94 V/mm (100 mV/mil) nominal for 11 mm probe systems |
Eddy-Current Probe Scaling and Gap Voltage Validation
The 3300 XL 11 mm Proximitor Sensor conditions high-frequency radio frequency (RF) signals transmitted to the connected proximity probe tip. The sensor demodulates the signal changes caused by target surface eddy currents into a proportional DC and AC voltage output. For an 11 mm probe system, the calibrated linear scale factor is 3.94 V/mm (100 mV/mil). During installation, static mechanical positioning requires gap voltage validation at the sensor output terminals. The technician sets the probe gap to achieve a nominal -10 VDC bias target, corresponding to the physical midpoint of the sensor linear operating range over carbon steel targets.
Frequently Asked Questions
Q: Why must the Proximitor Sensor remain matched to a 5.0 meter system cable length?
A: The internal oscillator and signal conditioning circuitry are tuned for a total system capacitance corresponding to 5.0 meters. Altering the physical cable length without recalculating tuning distorts the linear scale factor.
Q: What is the electrical requirement for supply power to the 330780 Proximitor Sensor?
A: The unit requires a negative DC supply voltage between -17.5 VDC and -26 VDC referenced to system ground, drawing a maximum current of 12 mA.
Field Installation Guidelines
- Snap the Proximitor Sensor housing securely onto a standard 35 mm DIN rail inside an IP65 or NEMA 4X rated field enclosure.
- Verify electrical isolation between the Proximitor base housing and the mounting plate to avoid unintended ground loops.
- Connect the 11 mm proximity probe extension cable to the Proximitor coaxial connector, ensuring the ClickLoc keyway is fully engaged and hand-tightened.
- Apply coaxial terminal insulation boots over the physical connection to isolate the coaxial outer conductor from local ground contact.
- Connect field wiring to the screw terminal block: -24 VDC power, Common, and Signal Output. Route field wires through grounded metal conduit.
- Adjust the probe position at the target shaft until the DC gap voltage measured at the signal terminals reads -10.0 VDC +/- 0.5 VDC.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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