Bently Nevada 7400124-200 Eddy Current Proximity Probe Extension Cable Unit

Module Feature

7400124-200 is a factory pre-terminated shielded extension cable for Bently Nevada eddy current probe measurement chain.

It connects the eddy displacement probe to the proximitor module in TSI rack. Cable capacitance and characteristic impedance are precisely calibrated to match the transducer system. PTFE insulation, overall copper braided shielding to suppress EMI noise. Fluoropolymer outer jacket offers excellent resistance to oil, high temperature and mechanical vibration. Both ends fitted with sealed circular metal connectors. It must be used together with the corresponding probe and proximitor as a matched set, and the correct cable length parameter must be configured in monitoring software. Widely stocked as maintenance spare for steam turbine, gas turbine and centrifugal compressor machinery protection cabinet.

Working principle

The proximitor sends high-frequency RF excitation signal through internal conductors to the probe coil.

The reflected eddy signal returns back along the same conductors to the proximitor. The proximitor converts impedance variation into DC gap voltage for displacement and vibration calculation. If cable capacitance deviates from calibration value, the monitor will trigger cable health fault alarm. Shielding must be grounded at only one end to eliminate ground loop interference.

Onboard componentsInner signal conductors, PTFE dielectric insulation, copper braid shield, fluoropolymer protective jacket, metal circular connectors, sealing boot and strain relief assembly.

LED indicatorsNo LED fitted on cable assembly; fault status and gap value are displayed on TSI monitor rack.

Hardware self‑diagnosisMonitor rack cable health test detects open circuit, short circuit and capacitance out of tolerance. Static gap calibration is performed by feeler gauge and voltmeter.

Programming softwareBently Nevada System 1 / Rack Configuration Software, used for cable length compensation setup and fault log review.

Electrical & Process Parameters

Model:7400124-200 Brand:Bently Nevada (Baker Hughes) Device type:Eddy current proximity probe extension cable Function:RF excitation and gap feedback signal transmission between eddy probe and proximitor

Mechanical & Structure

Mounting:Cable tray routing between probe junction box and monitor rack Protection class:IP67 at connector ends Housing:Flexible fluoropolymer jacket

Environmental

Operating temperature:-40℃ ~ +177℃ Storage temperature:-40℃ ~ +180℃ Ambient humidity:5~95% non‑condensing

Certification:

CE, ATEX optional

Status:

Original TSI machinery monitoring spare

Installation

Power off monitoring rack before cable replacement.

Check pin assignment and tighten connectors to specified torque value, avoid squeezing or stretching cable core, input correct cable length compensation parameter in monitor configuration, test cable health and stable gap reading after commissioning.

Interface

Probe side circular connector, proximitor rack side circular connector.

Diagnostic

Cable fault alarm: Internal wire break, short circuit, capacitance out of specification. Unstable gap reading: Double-ended shield grounding, loose connector, cable crushed. Measurement offset: Wrong cable length compensation parameter.

Product Brief7400124-200 cable, impedance-matched eddy current probe extension cable spare for turbine shaft vibration TSI monitoring cabinet replacement.