The Bently Nevada 330877-080-37-00, also cataloged as the 330877 3300 XL extension cable, operates as a dedicated hardware component for connecting 3300 XL 50 mm proximity probes to the associated Proximitor sensors within vibration monitoring instrumentation platforms.

Suffix & Configuration Breakdown

The 330877-080-37-00 part number denotes a specific length and shielding configuration designed for the 50 mm probe series. The suffix codes indicate an 8.0 meter cable length with armor and a specific connector interface required for high-reliability TSI (Turbomachinery Supervisory Instrumentation) installations. This cable maintains the rigid impedance requirements necessary for the 50 mm transducer system to function within its linear range.

Hardware Specifications

Transducer Signal Integrity & Impedance

The 50 mm transducer system relies on extremely stable signal transmission to measure low-frequency vibrations or large-gap position movements accurately. The 330877 extension cable is engineered with internal coaxial shielding to minimize electromagnetic interference (EMI) and cross-talk. To ensure the performance metrics of the 3300 XL system, the total length (probe + extension cable) must match the calibration of the Proximitor. The use of stainless steel armor provides protection against physical abrasion in high-density machinery housing environments.

Shipment Contents

• 1x 330877-080-37-00 Extension Cable

• 1x Connector protector kit

• 1x Installation technical manual

Field Installation Guidelines

• Cable Protection: Use the integrated stainless steel armor to shield the cable from localized mechanical impact and chemical exposure.

• Bend Radius: Maintain a minimum bend radius of 64 mm for armored cables to prevent damage to the internal coaxial core and shielding.

• Connection Security: Ensure ClickLoc connectors are fully mated and secured. Use only light torque with pliers to lock connectors; over-tightening can cause pin misalignment.

• Grounding: The cable shield must remain isolated from the machine case and mounting hardware to prevent ground loop noise that can introduce false vibration readings.

Frequently Asked Questions

• Is this cable compatible with standard 8 mm probes? No, the 330877 series is uniquely calibrated for the electrical characteristics of the 3300 XL 50 mm probe system.

• Can I repair a damaged armored cable? No, damage to the coaxial core or internal shielding renders the cable unsuitable for critical monitoring; the assembly must be replaced.

• What is the impact of cable length variation? The system is factory-calibrated for specific lengths; adding or removing length alters the impedance and invalidates the output sensitivity.

• Can I pull the cable through a conduit using the connector? Yes, provided the connector protectors are installed and pulling force is kept below 275 N (62 lb).

• What material is the armor made of? The armor is stainless steel, which provides both physical protection and excellent resistance to corrosive industrial environments.

• Are these cables used in hazardous areas? Yes, when installed according to the Bently Nevada control drawings for intrinsically safe (Ex i) systems.

• Do I need a specific tool to connect the cable? No, the ClickLoc interface is designed for manual connection; verify secure seating by feel and visual inspection.

• Can the cable be exposed to oil? Yes, the cable jacket and armor are designed for immersion in standard industrial lubricating oils and hydraulic fluids.