Bently Nevada 177112-075 Extension Cable Product Specification
177112-075 is an original factory coaxial extension cable belonging to Bently Nevada 3300XL 11 mm eddy-current proximity sensor system, manufactured in the United States for interconnection between 11 mm diameter proximity probe pigtail and matching proximitor signal input terminal. The numeric suffix 075 designates the fixed overall cable length of 7.5 meters pre-calibrated at production. As an indispensable component of complete three-piece proximity measurement assembly including probe, extension cable and proximitor, this cable is engineered with strictly controlled distributed capacitance to match factory calibration parameters of the whole transducer loop, compatible with all standard 3300XL 11 mm series probes as well as Bently 7200, 3300 and 3500 series proximitor units widely used on critical rotating machinery across power generation, petrochemical, natural gas compression and metallurgical industries. Any unauthorized field cutting or length modification will change total loop capacitance, resulting in sensitivity shift, linearity degradation and invalid measurement data against API 670 machinery protection standard requirements.
Description
Bently Nevada 177112-075 Extension Cable Product Specification
1. General Product Overview
177112-075 is an original factory coaxial extension cable belonging to Bently Nevada 3300XL 11 mm eddy-current proximity sensor system, manufactured in the United States for interconnection between 11 mm diameter proximity probe pigtail and matching proximitor signal input terminal. The numeric suffix 075 designates the fixed overall cable length of 7.5 meters pre-calibrated at production. As an indispensable component of complete three-piece proximity measurement assembly including probe, extension cable and proximitor, this cable is engineered with strictly controlled distributed capacitance to match factory calibration parameters of the whole transducer loop, compatible with all standard 3300XL 11 mm series probes as well as Bently 7200, 3300 and 3500 series proximitor units widely used on critical rotating machinery across power generation, petrochemical, natural gas compression and metallurgical industries. Any unauthorized field cutting or length modification will change total loop capacitance, resulting in sensitivity shift, linearity degradation and invalid measurement data against API 670 machinery protection standard requirements.
2. Physical Construction and Connector Specification
The cable features double-layer copper braided shielding structure wrapped around inner coaxial core to minimize electromagnetic interference from variable frequency drives, large motors and high-voltage equipment inside industrial control rooms. The outer jacket adopts special yellow high-performance polymer material with outstanding resistance against engine oil, lubricant splash, ambient moisture and mild chemical corrosive vapors commonly found in compressor and turbine installation surroundings. Strictly controlled low inherent capacitance design ensures stable signal transmission and consistent calibrated performance of the entire proximity measurement system.
Both cable ends are equipped with gold-plated standard Microdot coaxial connectors following Bently original locking specification; one end is male Microdot plug designed to mate with female pigtail connector of 3300XL 11 mm proximity probe, while the opposite female Microdot receptacle connects onto the signal input male pin of matched proximitor module. The precision locking mechanism provides tight waterproof and dustproof sealing to prevent intermittent contact caused by vibration or ambient humidity fluctuation during long-term continuous equipment operation. The full 7.5-meter finished cable length is fixed and validated during factory system calibration together with paired probe integral lead.
3. Core Electrical Characteristics
The coaxial layout is manufactured to consistent factory capacitance tolerance specified for 3300XL 11 mm transducer system, ensuring the combined capacitance from probe built-in short cable plus this 7.5 m extension cable matches the calibration setting of corresponding proximitor. Low signal attenuation property preserves linear gap-to-voltage conversion performance across full working frequency range from DC up to 10 kHz, supporting accurate static axial displacement and dynamic high-frequency vibration signal transmission without waveform distortion. Double shielding construction effectively restricts external stray electromagnetic noise intrusion to avoid abnormal measurement drift under complex industrial field electromagnetic environment.
4. Environmental Working Ratings
The cable outer jacket material is formulated for wide operating temperature range, permitting continuous working ambient temperature from -40°C up to +125°C, suitable for routing alongside high-temperature turbine casings, compressor bearing pedestals and conventional indoor control cabinet wiring channels. Storage and transportation temperature spans -45°C to +130°C to accommodate cross-regional spare part shipment and long-term warehouse storage under extreme climatic conditions. It can operate steadily within relative humidity from 5% to 95% non-condensing atmosphere and withstand occasional splashing of industrial lubricating oil without jacket cracking or internal insulation deterioration.
5. Application Scope
This 7.5-meter 177112-075 extension cable is exclusively matched with 3300XL 11 mm proximity probe system for radial shaft vibration, axial thrust displacement and differential expansion monitoring on large steam turbines, gas turbines, centrifugal compressors, heavy-duty induced draft fans and high-capacity feedwater pumps. Reliable signal delivery enables real-time machinery condition monitoring, early detection of shaft rub, bearing wear and rotor misalignment faults, supporting safety alarm and emergency interlock protection logic on connected DCS, PLC and Bently rack monitoring systems. It is widely used in new equipment installation project and field maintenance spare replacement for existing 3300XL 11 mm sensor loops in global heavy process industrial sites.
6. Installation Notes and Warranty Terms
Field installation should avoid sharp bending, excessive pulling and sharp metal edge abrasion on cable outer jacket to prevent internal core and shielding damage; bending radius shall follow manufacturer recommended minimum limit to maintain intact electrical performance. Original genuine 177112-075 complies with Bently factory internal quality control standard and relevant international electrical specifications. When installed properly within defined environmental conditions without artificial mechanical damage or arbitrary cutting modification, the product is covered by twelve-month limited manufacturer warranty starting from delivery date against inherent factory production defects of raw material and assembly workmanship.
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