Configured for signal transmission integrity in Bently Nevada proximity transducer chains, the Bently Nevada 84170-01 (84170-01 extension cable assembly) provides direct electrical execution of low-level eddy-current signal routing between proximity probe assemblies and Proximitor sensor interfaces within the Bently Nevada 3300/7200 measurement architecture.
The assembly functions as a controlled impedance transmission path for eddy-current displacement signals, maintaining electrical continuity between probe head and Proximitor input stage. It supports stable transfer of gap voltage and vibration-related signal components under EMI/RFI exposure conditions typical of industrial rotating machinery instrumentation channels.
Suffix Breakdown & Model Matrix
The 84170-01 is a single cataloged configuration. No manufacturer-published suffix segmentation or functional sub-variant matrix is defined for this part number.
Hardware Specifications
Parameter
Specification
Model
84170-01
Brand
Bently Nevada
Origin
USA
Operating Temp
-51 deg C to +177 deg C
Power Consumption
Passive component (no excitation power)
Impedance
System matched (typically 50 ohm / 75 ohm depending on configuration)
Signal Type
Eddy-current proximity transducer signal
Shielding
EMI/RFI braided shielding with coaxial construction
Connector Type
Miniature coaxial industrial connector system
Cross-Talk Suppression in Proximity Probe Cabling Systems
In Bently Nevada eddy-current measurement chains, the 84170-01 assembly supports reduction of inter-channel electromagnetic coupling between adjacent probe channels and extension cabling runs. Shield continuity and coaxial geometry maintain controlled return-path impedance, limiting signal distortion under high-density routing conditions in turbine and compressor instrumentation racks. This behavior directly influences stability of gap voltage interpretation and reduces phase distortion in multi-channel rotor dynamic measurements.
Frequently Asked Questions (FAQ)
Q: Does the 84170-01 support hot-swap during active proximity monitoring? A: No. The cable is part of the analog signal path. Disconnection under energized probe conditions interrupts gap voltage continuity and invalidates measurement output at the Proximitor input stage.
Q: What is the electrical impact of excessive cable length beyond system design limits? A: Increased cable length introduces attenuation and phase shift in the eddy-current signal path, affecting calibration scaling and reducing accuracy of displacement conversion.
Q: Is the shielding layer required to be grounded at both ends? A: Standard Bently Nevada practice is single-point grounding of the shield at the monitoring system end to minimize ground loop currents in the signal return path.
Field Installation Guidelines
Install the 84170-01 with continuous shield integrity from probe interface to Proximitor input terminal. Avoid sharp bend radius below manufacturer coaxial cable mechanical limits. Maintain separation from high-voltage AC conductors and switching relays to reduce inductive coupling. Ensure connector mating surfaces are clean and fully engaged to specified torque/locking condition. Verify shield termination continuity and absence of open-circuit or intermittent grounding prior to system commissioning.
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