EPRO CON031/913-030 Eddy Current Signal Converter Module

Product Overview

The CON031/913-030 eddy current signal converter from EPRO (Emerson) is designed to interface directly with PR6422–PR6426 proximity probe systems. The module conditions raw high-frequency eddy current signals and converts them into stable, standardized outputs suitable for machinery protection and condition monitoring platforms.

This converter is widely deployed in turbomachinery environments where accurate shaft vibration, displacement, and position measurements are essential for safe and reliable operation.

Product Function and Design

The CON031/913-030 module acts as the signal processing core between non-contact eddy current probes and downstream monitoring systems. It amplifies, linearizes, and filters probe signals while maintaining excellent phase and amplitude fidelity across a wide frequency range.

Key design objectives include long-term signal stability, high noise immunity, and compatibility with API 670 compliant protection architectures.

Probe Compatibility

The converter is engineered to operate with the following EPRO proximity probe families:

• PR6422

• PR6423

• PR6424

• PR6425

• PR6426

When paired with matched probes and extension cables, the system supports both standard and extended measuring ranges for radial and axial shaft monitoring.

Electrical Performance Characteristics

• Signal bandwidth from DC up to 20 kHz (–3 dB), suitable for vibration and slow-roll measurements

• Fast signal response with rise time below 15 microseconds

• Adjustable system sensitivity, supporting common configurations such as 4 V/mm and 8 V/mm

• High linearity accuracy, typically ≤ 1.0% with PR6423 probes and ≤ 1.5% for extended-range configurations

Power Supply and Output Interfaces

• Operating supply voltage ranges:

• –23 V to –32 V DC for –4 V to –20 V outputs

• –21 V to –32 V DC for –2 V to –18 V outputs

• Available output formats include:

• Analog voltage proportional to displacement or vibration

• 4–20 mA current loop for DCS and PLC integration

• RS485 digital interface for diagnostics and configuration

Environmental and Mechanical Specifications

• Operating temperature range from –30 °C to +100 °C, allowing installation near hot bearing housings

• Shock and vibration tolerance up to 5 g at 60 Hz (25 °C)

• IP20 protection class for cabinet-mounted installations

• Housing manufactured from ALMgSi 0.5 F22 aluminum alloy for thermal stability and mechanical strength

• Screw-type terminal connections for secure field wiring

Supported Measurement Applications

• Radial shaft vibration monitoring

• Axial shaft position and thrust measurement

• Shaft eccentricity detection

• Keyphasor and speed reference signal processing

These functions make the CON031/913-030 suitable for continuous operation in high-availability rotating equipment.

Typical Industrial Use Cases

• Steam, gas, and hydro turbines in power generation facilities

• Compressors and pumps in petrochemical and refinery plants

• Large fans, blowers, and gearboxes in process industries

• Machinery protection systems built to API 670 standards

Technical Summary

FAQ

Q: Is the CON031/913-030 interchangeable with other CON031 variants?
A: Electrical interfaces may be similar, but output ranges and probe compatibility vary by variant. Always verify system configuration before replacement.

Q: Can this module be used for axial thrust monitoring?
A: Yes. When paired with compatible PR642x probes, it supports precise axial shaft displacement measurements.