330854-040-24-CN | Bently Nevada | 3300 XL 25 mm Extension Cable

Configured for signal transmission between 25 mm proximity probes and Proximitor sensors in machinery health monitoring systems, the Bently Nevada 330854-040-24-CN (330854 Extension Cable) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

• 330854: 3300 XL 25 mm Extension Cable base model.
• 040: 4.0 meters (13.1 feet) total length.
• 24: High Temperature FluidLoc cable configuration.
• CN: Hazardous area certification (ATEX/IECEx/NEPSI).

Hardware Specifications

Mechanical Monitoring and TSI Characteristics

The 330854 extension cable maintains the required system impedance for the 3300 XL transducer loop. Successful gap voltage validation, targeting a -10 VDC setpoint at the Proximitor output, depends on the electrical integrity of this cable assembly. To ensure accurate rotor dynamics acquisition, the cable must be routed to avoid electromagnetic interference, employing cross-talk suppression by maintaining spatial separation from high-energy power conductors. Any compromise to the cable shield or dielectric will introduce signal noise, impacting the precision of radial displacement and vibration measurements.

Frequently Asked Questions

Q: Can the 4.0 meter length of this extension cable be modified in the field?

A: No. The transducer system is calibrated as a matched set, including the probe, extension cable, and Proximitor. Modifying the cable length alters the electrical impedance, which degrades the frequency response and linearity of the displacement signal.

Q: How should the hazardous area certification be verified during installation?

A: The CN suffix indicates compliance with ATEX, IECEx, and NEPSI standards. Verify that the system installation meets the specific safety parameters defined in the product-specific control drawing and local hazardous area regulations.

Field Installation Guidelines

• Connector Engagement: Ensure ClickLoc connectors are fully seated until the locking mechanism engages. Avoid applying excessive torque or mechanical stress to the connector interface.
• Cable Protection: Maintain a minimum bend radius of 25.4 mm (1.0 in) to prevent damage to the internal coaxial structure. Secure the cable with appropriate clamps to prevent vibration-induced wear.
• Shield Continuity: Maintain electrical continuity of the cable shield throughout the connection to the Proximitor. Use grounded cable trays or conduits if required to mitigate common-mode noise.
• Grounding: Verify that the monitoring system maintains a single-point ground reference to prevent ground loops, which can manifest as 50/60 Hz interference in the output signal.