84661-21 Velomitor Interconnect Cable

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	84661-21
Minimum Order Quantity:	1
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Quick Detail

Description

The 84661-21 is a high-integrity Velomitor Interconnect Cable specifically engineered by Bently Nevada to serve as the critical signal link for vibration monitoring systems. Unlike standard proximity cables, this Velomitor Interconnect Cable is optimized for velocity-based transducers, ensuring that the high-fidelity dynamic signals captured by a Velomitor sensor are transmitted to the monitoring rack with zero loss of data integrity. This specific model features a 21-foot (6.4-meter) total length, providing the necessary reach for complex machinery layouts where the sensor is mounted deep within the machine train.

Constructed for maximum durability, the 84661-21 Velomitor Interconnect Cable utilizes a two-conductor twisted, shielded design encased in a rugged stainless steel armor. This armored exterior is vital for protecting the internal signal wires from mechanical damage, sharp bends, and abrasive environments typical of industrial cooling towers, gas turbines, and large pump sets. The cable is terminated with a moisture-resistant female connector on one end, specifically designed to mate with the 330500 Velomitor or 330505 Low Frequency Velocity Sensor, while the other end features terminal lugs for seamless integration into field wiring junction boxes.

Applications

The 84661-21 is primarily utilized as the essential signal pathway for Velomitor vibration sensors mounted on critical rotating machinery. In power generation and petrochemical facilities, this cable bridges the gap between the velocity sensor located on a bearing housing and the local junction box. Its stainless steel armor allows it to be routed through areas where standard cables would be destroyed by mechanical debris or high-pressure washdowns, ensuring continuous monitoring of radial vibration.

This Velomitor Interconnect Cable plays a vital role in Cooling Tower and Fan Monitoring. Because cooling towers often present high-moisture and high-vibration environments, the moisture-resistant connector and shielded design of the 84661-21 are necessary to prevent signal degradation. It enables the reliable transmission of vibration data from the gearbox or motor to the vibration monitor, allowing for early detection of gear teeth wear or imbalance in the fan blades.

In industrial automation and System Retrofit Projects, the 84661-21 is used to integrate legacy velocity sensors with modern 3500 Series Monitoring Systems. Its standardized 2-wire twisted pair configuration and compatible terminal lugs make it easy to install in existing conduits. It serves as a dependable upgrade for older, unarmored cables, providing a more robust physical layer for critical machinery protection circuits in refineries and manufacturing plants.

Specifications

Competitive Advantage

1. Industrial-Grade Armored Mechanical Protection

The 84661-21 is equipped with a high-flexibility stainless steel armor jacket. This provides a significant advantage over non-armored cables by offering superior resistance to crushing, cutting, and abrasion. This ruggedized exterior ensures the Velomitor Interconnect Cable survives the physical rigors of industrial environments, drastically reducing the frequency of cable replacements and preventing false trips caused by wire damage.

2. Moisture-Resistant Connector Technology

Featuring a specialized moisture-resistant female connector, the 84661-21 ensures a gas-tight, waterproof seal at the sensor interface. This prevents moisture ingress and corrosion at the connection point—a common cause of signal failure in outdoor or high-humidity applications. This design ensures that the high-impedance signal remains clean and stable throughout the sensor's service life.

3. Optimized Signal Integrity and Low Capacitance

With a typical capacitance of only 55 pF/m, this cable is engineered to preserve signal fidelity over its 21-foot length. Low capacitance is critical for maintaining the frequency response of the velocity signal, ensuring that the monitoring system accurately captures both low-frequency thrust issues and high-frequency bearing faults without signal attenuation.