330930-040-09-05 4.0m Extension Cable | Bently Nevada

Introduction to the 330930-040-09-05

When reliable signal transmission is critical, the 330930-040-09-05 from Bently Nevada delivers. This 3300 NSv extension cable connects a proximity probe to a Proximitor sensor, ensuring accurate vibration and position measurements. Built for demanding industrial environments, it maintains signal integrity over its 4.0-meter length.

The cable features a 75 Ω coaxial design with fluoroethylene propylene (FEP) insulation. This construction provides excellent dielectric properties and thermal resistance. With multiple agency approvals, it meets diverse regulatory requirements for global installations.

Key Features and Technical Specifications

The 330930-040-09-05 offers several performance-critical specifications. Each parameter directly influences measurement accuracy and system reliability.

• Cable Length: 4.0 meters (13.1 feet) – precise length for standard installations.
• Connector Option: FluidLoc without stainless steel armor, with connector protector.
• Agency Approval: Multiple approvals for broad compliance.
• Material: 75 Ω coaxial, FEP insulated.
• Temperature Range: -51°C to +177°C (-60°F to +351°F).
• Shipping Weight: 1.5 kg.
• Center Conductor DC Resistance: 0.220 Ω/m (0.067 Ω/ft).
• Shield DC Resistance: 0.066 Ω/m (0.020 Ω/ft).
• Capacitance: 69.9 pF/m (21.3 pF/ft) typical.

The low DC resistance minimizes signal loss, while the controlled capacitance maintains consistent impedance. This ensures reliable data transfer from the probe to the monitor.

Applications and Use Cases

This extension cable suits turbomachinery, pumps, compressors, and other rotating equipment. It works with Bently Nevada 3300 NSv proximity systems to monitor shaft vibration and axial position. The wide temperature range allows installation in harsh environments, from cold outdoor facilities to high-heat process areas.

Because the cable length and probe length must sum to the Proximitor sensor total length, the 4.0-meter option integrates seamlessly with standard sensor setups. This simplifies system design and reduces installation errors.

Installation and Setup

Proper installation ensures optimal performance. Follow these guidelines:

• Verify the total length of probe plus extension cable equals the Proximitor sensor total length.
• Use field wiring of 0.2 to 1.5 mm² (16 to 24 AWG); with ferrules, use 0.25 to 0.75 mm² (18 to 23 AWG).
• Recommend a three-conductor shielded triad cable for field wiring.
• Keep the distance between the Proximitor sensor and monitor within 305 meters (1,000 feet) to avoid signal rolloff.

Always route the cable away from high-voltage sources and sharp bends. Secure connectors properly to prevent strain.

Maintenance and Reliability

The FEP insulation provides excellent resistance to chemicals and moisture. This reduces the need for frequent maintenance. However, periodic inspection is recommended.

Check connectors for corrosion or damage. Verify the cable jacket for cuts or abrasions. Ensure that the connector protector remains intact. Regular inspection helps prevent unexpected failures and extends service life.

Compatibility and Integration

The 330930-040-09-05 is designed for Bently Nevada 3300 NSv systems. It connects directly to compatible probes and Proximitor sensors. The 75 Ω impedance matches standard Bently Nevada components, ensuring consistent signal quality.

For field wiring, use a three-conductor shielded triad cable. This minimizes electromagnetic interference and maintains signal integrity over long runs.

Troubleshooting and Common Issues

Signal loss or erratic readings often stem from incorrect cable length or poor connections. Verify that the probe and extension cable lengths sum correctly. Check all connectors for tightness and corrosion.

If the cable is exposed to extreme temperatures beyond its rated range, insulation may degrade. Replace the cable if damage is visible. Always follow the manufacturer's guidelines for diagnosis.

Product Support and Availability

AutoDCSTech stocks the 330930-040-09-05 and can provide technical support. Contact us for availability and ordering information. We are ready to help you maintain your vibration monitoring systems.