Epro CON021+PR6423/010-100-CN Eddy Current Proximity Measurement System

Product Description

The PR6423/010-100-CN + CON021 assembly from Emerson Epro is engineered for continuous, non-contact measurement of shaft movement in rotating machinery. This system applies eddy-current sensing technology to capture precise displacement and vibration data, even in installations requiring extended cable routing.

By combining a rugged probe with a dedicated signal conditioning unit, the system ensures stable output signals suitable for machinery protection, condition monitoring, and diagnostic applications.

System Architecture

PR6423/010-100-CN Eddy Current Probe
The PR6423/010-100-CN belongs to the PR6423 series and features an 8 mm sensing tip optimized for high-reliability operation in industrial environments. The CN version represents a region-specific configuration with defined connector standards.

The “010-100” designation typically corresponds to calibration pairing and an extended cable configuration, commonly around 10 meters, enabling installation flexibility for large machinery layouts.

Measurement functions include:

• Radial shaft vibration monitoring

• Axial displacement detection

• Rotor position measurement

• Gap voltage reference output

CON021 Signal Conditioner
The CON021 module drives the probe with a high-frequency signal and converts the response into a proportional voltage output. It provides signal stabilization, linearization, and diagnostic capabilities required for integration into monitoring systems.

Technical Specifications

PR6423/010-100-CN Probe

• Measurement Principle: Eddy current, non-contact

• Tip Diameter: 8 mm

• Measurement Range: ±1.0 mm to ±2.0 mm (calibration-dependent)

• Sensitivity: 8 mV/µm (system calibrated)

• Frequency Response: Up to 10 kHz

• Linearity: ≤ ±1% of full scale

• Resolution: Better than 1 µm

• Operating Temperature: –35 °C to +180 °C

• Protection Rating: ≥ IP65

• Housing Material: Stainless steel

• Cable Length: Approx. 10 m integrated coaxial cable

• Connector: Epro standard coaxial connector

• Mounting Options: Threaded or clamp-type installation

CON021 Driver Module

• Function: Probe driver and signal conditioning unit

• Compatible Probes: PR6422, PR6423, PR6424, PR6426 series

• Supply Voltage: 24 V DC

• Excitation Method: Internal high-frequency oscillator

• Output Signal: Linear analog voltage proportional to displacement (typically 0–20 V)

• Sensitivity: 8 mV/µm (with matched probe)

• Frequency Range: Up to 10 kHz

• Accuracy: ≤ ±1% FS

• Diagnostics:

• Probe status monitoring

• Cable break detection

• Gap voltage supervision

• Operating Temperature: –20 °C to +70 °C

• Mounting: DIN rail or rack integration

System Performance Summary

• Sensitivity: 8 mV/µm

• Linear Measurement Range: Up to ±2 mm

• Bandwidth: Up to 10 kHz

• Accuracy: ≤ ±1% FS

• Output Signal: Analog voltage

Application Areas

• Steam and gas turbine shaft monitoring

• Compressor and blower vibration analysis

• High-speed motor and generator protection

• Gearbox condition monitoring

• Petrochemical and process industry rotating equipment

Key Features

• Contactless measurement eliminates wear and drift

• Supports long cable installations without signal degradation

• Resistant to thermal variation and electromagnetic interference

• Compatible with MMS 6000, MMS 3000, and VM600 systems

• Modular structure for simplified maintenance and replacement

FAQ

Q: What is the advantage of the “100” cable configuration?
A: It allows installation over longer distances, typically around 10 meters, making it suitable for large equipment layouts.

Q: Can this system be used with other PR642x probes?
A: The CON021 supports multiple probe types, but proper calibration matching is required for accurate measurement.

Q: What type of output is provided?
A: A linear voltage signal proportional to shaft displacement, usually within a 0–20 V range.