Introduction
The part number 81546-01 refers to a Proximity Transducer System (PTS) Extension Cable Assembly. This component is a critical part of the cabling infrastructure for machinery protection systems that use eddy current proximity probes.
This is not a sensor or a monitor, but a specialized cable used to extend the distance between a proximity probe and its corresponding signal conditioner (proximitor). It is designed to maintain signal integrity over long distances in electrically noisy industrial environments. The assembly typically includes connectors that are keyed and environmentally sealed to ensure a robust and reliable connection, which is vital for accurate vibration and position measurement.
Key Parameters
The following table outlines the typical specifications for this extension cable assembly.
| Parameter Category | Specification |
|---|---|
| Part Number | 81546-01 |
| Type | Proximitor Extension Cable Assembly |
| Function | Extends the connection between a proximity probe and a proximitor |
| Length | Specified by the part number (e.g., 5, 10, 15 meters) |
| Connector 1 (Probe End) | Female, 2-pin, MS-style or Bendix-style, keyed |
| Connector 2 (Proximitor End) | Male, 2-pin, MS-style or Bendix-style, keyed |
| Cable Type | Coaxial, with overall shield for noise immunity |
| Inner Conductor Material | Tinned Copper |
| Shielding Material | Copper Braid |
| Outer Jacket Material | Flexible, Oil-Resistant PVC or Polyurethane |
| Operating Temperature | -40 °C to +150 °C (-40 °F to +302 °F) |
| Dimensions (Cable Diameter) | Approx. 5.0 mm (0.2 in) |
| Weight (per meter) | Approx. 0.1 kg/m (0.22 lbs/m) |
Application Scenarios
This extension cable is an essential ancillary component used wherever proximity probes are installed on machinery. Its primary application scenarios include:
Connecting Probes to Remotely Mounted Racks:
Turbines, Compressors, and Large Pumps: Used to connect proximity probes installed directly on the machine to the monitoring rack (containing the proximitor cards) which is often located in a protected cabinet some distance away from the high-temperature and high-vibration environment of the machine itself.
System Installation and Retrofitting:
Machinery Upgrades and Expansions: Essential for installing new monitoring points or during the retrofit of an older system where the existing cabling is insufficient. It allows for flexible placement of system components.
Signal Integrity Maintenance:
Noise Reduction in Industrial Plants: The shielded design protects the low-level, high-frequency signal from the probe against electromagnetic interference (EMI) from motors, power cables, and other equipment, ensuring accurate and reliable data reaches the monitoring system.
General Purpose Machinery Monitoring Systems:
Used in virtually all industries that employ Bently Nevada or compatible proximity probe systems for measuring radial vibration, axial position, and eccentricity on critical rotating assets.
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