21747-040-01 Extension Cable

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	21747-040-01
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 21747-040-01 is a high-precision Extension Cable specifically engineered for the Bently Nevada 7200 series proximity transducer systems. As a critical link in the machinery protection signal chain, the 21747-040-01 ensures that high-frequency eddy current signals are transmitted from the proximity probe to the Proximitor sensor with minimal loss or distortion. This specific model features a cable length of 40 feet (12.19 meters), providing an extended reach for large-scale industrial machinery where monitoring points and local junction boxes are separated by significant distances.

In the world of vibration monitoring, the 21747-040-01 Extension Cable is synonymous with reliability. It is designed to match the specific electrical characteristics of the Bently Nevada 7200 series, including precise capacitance and impedance matching. Using a genuine 21747-040-01 is essential because any variation in these electrical properties can lead to measurement inaccuracies, potentially resulting in "false trips" or, worse, the failure to detect an actual shaft vibration or axial position fault. The connectors on the 21747-040-01 are precision-machined to ensure a secure, low-resistance interface, which is vital for maintaining the linearity of the transducer system across its entire 2 mm (80 mils) range.

Applications

The 21747-040-01 is primarily used as a long-distance signal conduit for Bently Nevada 7200 series transducer systems installed on large rotating equipment. With its 40-foot (12.19 m) length, it is ideal for connecting probes mounted deep within massive steam turbines or centrifugal compressors to Proximitor sensors located in external, vibration-isolated cabinets. This ensures that sensitive vibration and position data are accurately delivered even when the physical layout of the machine requires an extended cable run.

In the energy and chemical sectors, this Extension Cable is a vital component for monitoring equipment in explosive and hazardous atmospheres. Carrying CSA, ATEX, and IECEx approvals, the 21747-040-01 is rated for use in intrinsically safe circuits. It is commonly applied on refinery pumps, offshore gas compressors, and chemical agitators where the presence of flammable gases necessitates a cable that meets the most stringent global safety standards for electrical equipment in hazardous locations.

The 21747-040-01 is also heavily utilized in environments subjected to extreme thermal cycling and fluid exposure. Designed to operate reliably within a wide temperature range, it is routed from the bearing housings of industrial motors and gearboxes through potentially oil-laden or humid areas. The stainless steel armor option (01) provides an extra layer of protection against corrosive process fluids and mechanical wear, ensuring the integrity of the vibration signal in the "hot zones" of industrial machinery.

Specifications

Competitive Advantage

Integrated Stainless Steel Interlocked Armor: The "01" configuration of the 21747-040-01 includes rugged stainless steel armor. This provides superior mechanical protection against crushing and abrasion compared to non-armored cables. This robust exterior significantly extends the service life of the Extension Cable in harsh environments where the cable might be stepped on or rubbed against sharp machinery edges, reducing replacement costs and downtime.

Global Triple Agency Approvals (CSA, ATEX, IECEx): This Bently Nevada cable is pre-certified for use in hazardous areas worldwide. Having these triple approvals as a standard feature gives the 21747-040-01 a decisive edge for multinational companies. It simplifies the engineering and procurement process by allowing a single, globally-compliant part number to be used across different regions, ensuring adherence to local intrinsic safety regulations.

Exceptional Thermal and Electrical Stability: Rated for an expansive operating temperature range (-65°C to +155°C), the 21747-040-01 maintains consistent electrical performance even under extreme heat. Its low supply sensitivity ensures that temperature-induced changes do not affect the accuracy of the vibration output voltage. This stability is crucial for preventing false alarms in the monitoring system, especially during machine startup or high-load operations.