Description

21747-040-01 is a 7200 Series extension cable used to connect Bently Nevada proximity probes to Proximitor sensors, forming part of a non-contacting vibration and position monitoring system. This specific configuration features a 4.00 meter (13.1 ft) cable length (Option 040) and includes stainless steel armor (Option 01) to provide enhanced protection against mechanical damage and abrasion in harsh industrial environments. The 7200 Series proximity transducer system operates on the eddy-current principle, measuring static and dynamic distances between the probe tip and a target surface. This extension cable is designed for use in 7200 Series monitoring loops, where the combination of probe, extension cable, and Proximitor is matched to achieve precise system calibration. The armored construction of this model ensures long-term integrity in demanding applications such as steam and gas turbines, compressors, and large rotating machinery where cable protection is critical.

Features

• 4.00 meter (13.1 ft) total cable length
• Stainless steel armor for increased resistance to physical abuse and abrasion
• Compatible with 7200 Series 5 mm and 8 mm proximity probe and Proximitor systems
• Shielded coaxial cable construction to maintain signal integrity between probe and monitor
• Designed for use in critical machinery monitoring applications, including axial position and radial vibration

Applications

• Radial vibration monitoring for bearing condition and rotor alignment
• Axial thrust position measurement
• Rotor stability monitoring (shaft average radial position)
• Turbine, compressor, and pump rotating machinery protection

Ordering Information

Option	Code on This SKU	Description
Orderable Part Number	21747-040-01	7200 Series Extension Cable
A - Cable Length	040	4.00 metres (157 inches)
B - Armor Option	01	With stainless steel armor

Technical Specifications

Parameter	Specification
Manufacturer	Bently Nevada
Part Number	21747-040-01
System Series	7200 Proximity Transducer System
Cable Length	4.00 metres
Armor	Included (Stainless Steel)
Operating Temperature	-34 degC to +177 degC (-30 degF to +350 degF)
Relative Humidity	To 95%, noncondensing

Installation Guidelines

• Ensure the cable is routed away from high-voltage lines or sources of electromagnetic interference to prevent signal noise.
• Avoid sharp bends in the cable; maintain the minimum bend radius specified for coaxial cabling to prevent internal conductor damage.
• Ensure all connectors are clean and dry before mating; tighten connectors securely to maintain a consistent signal path.
• When using armored cables, ensure the armor is properly grounded if the application environment requires shielding against RFI/EMI.