Description

The Bently Nevada 16710-25 is a 3-conductor shielded, armored interconnect cable assembly engineered for critical machinery protection architectures. This cable provides a low-impedance, EMI-shielded signal path between 330400 or 330425 casing acceleration transducers (accelerometers) and a 3500 Series or legacy 7200 Series monitoring system. The “-25” suffix defines the precise cable length option of 25 feet (7.62 meters).

Technical Specifications

Technical Features & Field Engineering Context

Shielding Architecture and Signal Preservation

The 330400 accelerometer generates a small analog signal (100 mV/g), which is highly susceptible to high-frequency induced noise when routed through heavy industrial environments. The 16710-25 counters common-mode and differential-mode noise by utilizing an aluminum Mylar foil shield. In field installations, the drain wire must be grounded at one end only (typically at the monitor rack terminal strip) to prevent ground loops from introducing parasitic 50/60 Hz hum or ripple into the vibration metrics.

Physical Armor Integrity and Installation Constraints

The flexible interlocking metal armor protects the internal tinned-copper conductors from physical stress, abrasion, and crushing forces common on compressor decks and gas turbine enclosures.

• Routing Note: Avoid tight radius bends during installation. Maintain the minimum bend radius stipulated for standard 22 AWG armored assemblies to prevent internal shielding separation or physical binding of the inner cores.
• Intrinsically Safe Deployments: When deployed in Class I, Division 1 or Zone 0 hazardous environments, this cable must be integrated in accordance with the entity parameters listed on the Bently Nevada 330400/330425 control drawings. Verify that the system’s total capacitance (C_c) and inductance (L_c) constraints are not breached across the complete 25-foot run.

Commercial and Logistics Status

• Condition: New Original (Factory Sealed packaging) or New Surplus.
• Warranty Period: 12-month standard operational warranty from date of dispatch.
• Global Lead Time: Ships within 1 to 3 business days for in-stock surplus; factory-allocated lead times may extend to 10+ weeks depending on current OEM manufacturing backlogs.
• Documentation: Certificate of Conformance (CoC) and Certificate of Origin (COO) available upon request prior to cross-border logistics deployment.

Commercial Note: The listed market pricing for Bently Nevada interconnect components fluctuates depending on raw material availability and specific factory allocations. Contact our sales desk for a firm, real-time quote.

Frequently Asked Questions

Can this cable be used with a 330100 Proximitor system?

No. The 16710-25 is terminated with a 3-socket MIL-style connector engineered for accelerometer transducer casings. Bently Nevada Proximitor sensors utilize miniature coaxial click-lock style connectors (such as the 3300 XL series connectors), which require distinct extension cables like the 330130 series.

What is the function of the third core wire in this assembly?

Unlike proximity probes that utilize a two-wire DC bias configuration, the 330400/330425 accelerometers operate on a three-wire topology: Power (Constant Current Source), Signal Out, and Common Return. The 16710-25 provides isolated paths for all three signals within a single armored run.

Is it acceptable to splice this cable if the 25-foot length is slightly short?

Splicing is strongly discouraged in machinery protection circuits. Introducing intermediate junction terminals alters line impedance, compromises shield continuity, and creates an ingress point for moisture or chemical contaminants, directly violating intrinsic safety compliance criteria. If 25 feet is insufficient, source the appropriate longer option (e.g., 16710-30 or 16710-50).