Bently Nevada 330854-080-24-05 FluidLoc Extension Cable 3300 XL

Product Overview

Bently Nevada 330854-080-24-05 FluidLoc Extension Cable: Seamless Transition & Legacy System Compatibility

The Bently Nevada 330854-080-24-05 is a FluidLoc armored extension cable engineered for the 3300 XL and 7200 Series eddy-current proximity measurement systems. As rotating machinery protection programs evolve and legacy wiring infrastructure ages, plant engineers increasingly face the challenge of replacing worn, corroded, or discontinued cable assemblies without triggering a full sensor loop recalibration or system shutdown. This cable is a direct, drop-in replacement that preserves the original signal chain integrity — from the 3300 XL 8mm Proximity Transducer tip all the way back to the 3300 XL Proximitor® Sensor — without requiring changes to existing conduit routing, junction box terminations, or DCS input card wiring.

In most brownfield retrofit scenarios, the extension cable is the first component to degrade. Mechanical vibration, thermal cycling, chemical exposure, and repeated maintenance access cause the FluidLoc armor jacket and internal coaxial conductors to fatigue over time. Replacing the 330854-080-24-05 with a specification-matched unit restores the system’s -18.0 V DC bias voltage stability and ensures the eddy-current gap measurement remains within the ±0.5% linearity specification required for API 670 compliance. Because the cable length (2.0 m / 80 inches) and connector configuration are preserved exactly, no re-gapping of the probe tip or re-entry of scale factors into the 3500/42M Proximitor®/Seismic Monitor or 3500/40M Proximitor® Monitor is necessary.

For facilities running the Bently Nevada 3300 XL platform alongside the 3500 Series rack-based machinery protection system, this cable is fully interoperable. The 3500 rack accepts the same Proximitor® Sensor output, meaning a single cable swap restores full channel functionality — including OK relay status, gap voltage readout, and dynamic vibration signal — without any firmware changes or module reinitialization. Engineers migrating from older 7200 Series proximity loops to the 3300 XL architecture will find that the 330854-080-24-05 extension cable bridges both platforms, supporting a phased migration strategy that avoids simultaneous replacement of the probe, extension cable, and Proximitor® in a single outage window.

During installation, the cable’s TNC-style connectors mate directly with the 330730 8mm Proximity Probe on one end and the 330180 Proximitor® Sensor on the other, requiring only hand-tight torque to achieve a weatherproof, vibration-resistant connection. No special tooling is required. The FluidLoc armor provides IP67-equivalent mechanical protection, making it suitable for outdoor installations, wash-down environments, and areas with exposure to turbine lube oil, hydraulic fluid, or process condensate. Cable routing through existing 3300 XL conduit systems requires no re-pulling of conduit or re-labeling of junction box terminals, significantly reducing the labor cost and outage duration of a cable replacement event.

For control system integrators managing a mixed fleet of turbines, compressors, and pumps monitored by both 3300 XL and 7200 Series Proximitor® Sensors, stocking the 330854-080-24-05 as a universal spare reduces the number of unique cable part numbers required in the maintenance inventory. This is particularly valuable in facilities where the 3500/22M Transient Data Interface or 3500/15 Power Supply modules are already installed and the proximity loop infrastructure is shared across multiple machine trains. A single cable replacement restores the entire measurement channel, avoiding the cascading delays that occur when probe, cable, and Proximitor® must be sourced separately from different suppliers with different lead times.

Procurement teams evaluating this replacement should note that TOPNLMS maintains ready stock of the 330854-080-24-05 and related proximity system components, including the 330730-080-00-00 Proximity Probe, 330180-91-00 Proximitor® Sensor, and 330850-080-24-05 Interconnect Extension Cable. All units are inspected and function-tested prior to shipment from our Xiamen facility. Standard lead time is 3–7 business days for international orders, with expedited options available for critical plant shutdowns. Each unit ships with a 12-month warranty covering manufacturing defects, connector integrity, and cable continuity.

Compatibility Comparison Table

Seamless Upgrade Solutions

A complete proximity measurement loop replacement or upgrade typically involves more than just the extension cable. When migrating from a degraded or end-of-life 7200 Series proximity system to the 3300 XL platform, the following components are commonly replaced or upgraded in the same outage window to ensure system-wide signal integrity and avoid repeat maintenance events.

The 330730-080-00-00 8mm Proximity Probe is the most common companion replacement. If the probe tip shows wear, pitting, or contamination from lube oil exposure, replacing it alongside the 330854-080-24-05 extension cable eliminates the need for a second outage entry. The probe and cable are factory-matched as a system, and replacing both simultaneously ensures the gap voltage and scale factor remain within the original calibration envelope without requiring a new system calibration certificate.

The 330180-91-00 Proximitor® Sensor is the signal conditioning module that converts the eddy-current gap measurement into a -18 V DC proportional output. In aging installations, the Proximitor® housing may show signs of moisture ingress or connector corrosion that degrades the OK relay threshold and introduces noise into the vibration signal. Replacing the Proximitor® alongside the extension cable during a planned outage is a best-practice approach recommended for systems with more than 10 years of continuous service.

For facilities upgrading to the 3500 Series rack-based protection system, the 3500/40M Proximitor® Monitor and 3500/42M Proximitor®/Seismic Monitor modules accept the same proximity loop wiring as the legacy 3300 XL system. The 330854-080-24-05 extension cable connects directly to these monitor inputs without modification, making it a bridge component in a phased migration from standalone Proximitor® sensors to a fully integrated 3500 Series rack with the 3500/15 Power Supply and 3500/22M Transient Data Interface.

Junction box and field wiring integrity is another common failure point in long-running proximity systems. The 330850-080-24-05 Interconnect Extension Cable is often used in parallel runs where additional cable length is required between the junction box and the control room. Replacing both the 330854 and 330850 series cables in the same outage eliminates all field wiring as a variable when troubleshooting intermittent OK relay trips or high-noise vibration readings.

Finally, for systems where the 3300 XL Proximitor® output feeds a DCS analog input card — such as a Honeywell C300 controller or an Emerson DeltaV M-Series I/O card — verifying the 4–20 mA or ±10 V DC signal interface after cable replacement is a standard commissioning step. TOPNLMS can supply the 330854-080-24-05 as part of a complete proximity loop kit that includes the probe, extension cable, and Proximitor® Sensor, reducing procurement lead time and ensuring all components are specification-matched before they arrive on site.

Retrofit Guidance FAQ

Q: Do I need to re-gap the proximity probe after replacing only the extension cable?
A: No. The 330854-080-24-05 is a direct length-matched replacement. As long as the probe tip position relative to the target shaft has not changed, the existing gap voltage and scale factor remain valid. Re-gapping is only required if the probe itself is replaced or if the probe mounting bracket has shifted.

Q: Is this cable compatible with both the 3300 XL and 7200 Series Proximitor® Sensors?
A: Yes. The TNC connector configuration and coaxial impedance characteristics are identical across both platforms. The cable can be used as a direct replacement in either system without modification.

Q: Will replacing this cable affect my API 670 compliance documentation?
A: Replacing a like-for-like specification cable does not invalidate API 670 compliance. The replacement unit maintains the same electrical characteristics — impedance, capacitance, and conductor gauge — as the original. We recommend updating your maintenance log with the replacement date and new serial number for audit purposes.

Q: Can this cable be used in a hazardous area (Zone 1 / Class I Div 1) installation?
A: The 330854-080-24-05 is a passive cable assembly with no active electronics. Its use in hazardous areas is governed by the Proximitor® Sensor’s intrinsic safety (IS) certification and the associated barrier or isolator in the control room. Consult the Bently Nevada 3300 XL system documentation and your site’s area classification drawings before installation.

Q: What is the lead time and shipping method for urgent replacement orders?
A: Standard orders ship within 3–7 business days from our Xiamen facility via DHL Express or FedEx International Priority. For critical plant shutdowns, expedited same-day dispatch is available for in-stock units. Contact us at [email protected] or +86 18359293191 to confirm stock availability and arrange priority shipment.

Q: How do I verify the cable is functioning correctly after installation?
A: After installation, check the Proximitor® OK relay status (should be energized), verify the gap voltage is within the system’s linear range (typically -10 V DC ± 2 V for an 8mm probe at nominal gap), and confirm the dynamic vibration signal is clean on the monitor display. If the OK relay does not energize, check connector seating at both ends before suspecting a cable fault.

Warranty Assurance

Every Bently Nevada 330854-080-24-05 FluidLoc Extension Cable supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. Our warranty covers manufacturing defects, connector integrity failure, coaxial conductor continuity, and FluidLoc armor jacket integrity under normal operating conditions. Prior to dispatch, each unit undergoes a pre-shipment inspection that includes visual inspection of the armor jacket and connectors, DC resistance measurement of the inner conductor and shield, and connector torque verification to ensure weatherproof seating.

In the event of a warranty claim, TOPNLMS will arrange a replacement unit shipment within 5 business days of receiving the defective unit and confirming the fault. For critical applications where downtime cannot be tolerated, we recommend maintaining one spare unit on-site and contacting us immediately upon identification of a cable fault so that a replacement can be dispatched before the spare is consumed. Our after-sales response team is available via email at [email protected] and by phone at +86 18359293191 during business hours (GMT+8).

Procurement teams requiring formal warranty documentation, test reports, or certificates of conformance for their quality management systems should request these at the time of order. TOPNLMS can provide a pre-shipment inspection report and a statement of conformance to the original Bently Nevada specification for each unit supplied.