The 330130-080-02-05 extension cable is a specialized interconnect assembly designed for the Bently Nevada 3300 XL 8mm proximity transducer system. Serving as the vital link between the proximitor sensor and the proximity probe, this extension cable is engineered to maintain the precise 75 Ohm characteristic impedance required for accurate signal transmission. By preserving the integrity of the high-frequency carrier signal, this cable ensures that critical vibration and position data—such as radial shaft vibration, axial thrust, and rotor eccentricity—are accurately relayed to the monitoring instrumentation. This assembly is built to survive in the rigorous mechanical and thermal environments common to large-scale rotating machinery.

Technical Specifications

Model Configuration Breakdown

• 330130: 3300 XL 8mm Extension Cable series designation.
• 080: 8.0-meter cable length, optimized for applications where the proximity probe is at a significant distance from the monitoring rack.
• 02: Miniature ClickLoc connector system with gold-plated contacts.
• 05: Standard configuration without stainless steel armor, utilizing the high-performance FEP jacket.

Typical Applications

The 8-meter length provides flexibility for large-scale industrial assets where central monitoring enclosures are placed remotely from the machine train:

• Steam and Gas Turbines: Monitoring critical vibration points at bearing housings.
• Centrifugal Compressors: Tracking axial thrust and radial displacement to prevent internal contact.
• Large Industrial Fans and Blowers: Diagnosing imbalances in high-speed impellers.
• Hydroelectric Generators: Ensuring shaft stability and clearance in underwater or high-humidity environments.

System Compatibility

This extension cable is fully compatible with the 3300 XL 8mm Proximity Transducer System. It is designed to work in conjunction with the 3300 XL Proximitor sensor and the 33010x series of 8mm probes. The entire system—probe, extension cable, and proximitor—must be verified as a matched set (typically 5-meter or 9-meter systems) to maintain the factory-calibrated linear output of 200 mV/mil. It is a drop-in replacement for maintenance cycles within existing Bently Nevada 3500 rack installations.

Installation and Site Procedures

• Cable Handling:
  • Avoid sharp-angle bending; observe a minimum 5 cm bend radius to protect the coaxial structure.
  • Do not exert tension on the cable during installation; use cable ties to secure the assembly without crushing the jacket.
• Connector Mating:
  • Before connecting, inspect for metallic debris, oil, or dust on the gold-plated pins.
  • Engage the ClickLoc mechanism until a clear tactile click is felt, confirming the locking spring is fully seated.
• Conduit Requirements:
  • Utilize dedicated metallic conduits for signal lines to prevent cross-talk and induction from AC motor leads or VFD cabling.
• Environmental Sealing:
  • Ensure the connector junction is shielded within a NEMA/IP-rated junction box to prevent industrial lubricant ingress over time.

Product Advantages

The 330130-080-02-05 utilizes high-grade materials to minimize signal attenuation over long distances. The FEP cable jacket is chemically inert, providing superior protection against synthetic oils, solvents, and corrosive gases found in petrochemical plants. The ClickLoc connector system is purpose-built to resist high-frequency vibrations that otherwise cause intermittent signal dropouts in standard screw-type connectors, thereby enhancing the reliability of machinery protection systems.

Ordering Information

• Standard Package: 1 x 330130-080-02-05 Extension Cable, 2 x Protective Connector Caps.
• Compliance: All cables are manufactured to meet current EMC and hazardous area standards required for global industrial deployment.
• Availability: This part is a standard stock item for critical path maintenance and emergency repair kits.

Frequently Asked Questions

• Q: Can I splice this cable if it is too long?

  A: No. Splicing will alter the impedance and introduce reflections, which will degrade signal accuracy and void system calibration.

• Q: What is the benefit of the FEP jacket?

  A: FEP is highly resistant to temperature fluctuations and chemical degradation from lubricants, ensuring a long service life in harsh environments.

• Q: How does this cable differ from armored versions?

  A: The non-armored version (05 option) is more flexible and easier to route in protected conduit environments.

• Q: Can I use this with a 5-meter system?

  A: No. The system must be calibrated for the total length; 8-meter extensions are typically used for 9-meter total length systems.

• Q: What should I do if the signal becomes erratic?

  A: Inspect the ClickLoc connections for tightness and check for cable jacket damage that could expose the inner conductor.

• Q: Does this cable need to be grounded?

  A: The cable shield is connected via the Proximitor; ensure the Proximitor base is properly mounted to a grounded machine surface.

• Q: Is this cable compatible with 3300 series legacy components?

  A: It is optimized for 3300 XL components; while it may physically fit, system-wide electrical compatibility should be verified via technical manual.

• Q: Why is 75 Ohm impedance critical?

  A: It matches the transducer's carrier signal frequency to prevent reflection, ensuring the output remains perfectly linear to shaft displacement.