EPRO CON031/914-060 Eddy Current Signal Converter Module

Overview

The CON031/914-060 is a high-performance eddy current signal conditioning module developed by EPRO (Emerson) for precision shaft vibration and displacement measurement. Designed to interface seamlessly with PR6422 through PR6426 proximity probe series, this module converts raw probe signals into stable, industry-standard outputs suitable for machinery monitoring and protection systems.

Engineered for continuous operation in demanding environments, the CON031/914-060 supports both dynamic vibration analysis and static position measurement in critical rotating equipment such as turbines, compressors, pumps, and large industrial fans.

Key Functions

The CON031/914-060 performs signal amplification, linearization, and filtering of eddy current sensor inputs, delivering accurate and repeatable outputs for downstream control and protection hardware.

Supported measurement functions include radial shaft vibration, axial position, shaft displacement, eccentricity, and keyphasor-based speed reference signals.

Probe Compatibility

The module is electrically matched for use with the following EPRO proximity probe families:

PR6422 series
PR6423 series
PR6424 series
PR6425 series
PR6426 series

Automatic adaptation ensures stable sensitivity and linearity when used with approved probe and extension cable combinations.

Dynamic Performance Specifications

Frequency Response (–3 dB): DC to 20 kHz
Rise Time: Less than 15 microseconds
Phase Stability: Optimized for vibration and transient analysis
Sensitivity Options: Configurable for 4 V/mm or 8 V/mm (probe-dependent)
System Linearity: ≤ ±1.0% with PR6423 and PR6424 probe systems

These characteristics allow precise capture of both low-frequency shaft movement and high-frequency vibration phenomena.

Electrical Characteristics

Supply Voltage Range:
–23 VDC to –32 VDC for –4 V to –20 V output
–21 VDC to –32 VDC for –2 V to –18 V output

Output Interfaces:
Analog voltage output proportional to displacement or vibration
4–20 mA current loop for long-distance transmission
RS485 digital communication for diagnostics and configuration

Output signals are fully compatible with API 670 compliant monitoring systems and industrial PLC or DCS platforms.

Environmental and Mechanical Data

Operating Temperature Range: –30 °C to +100 °C
Shock Resistance: 5 g at 60 Hz (25 °C reference)
Protection Rating: IP20
Housing Material: Aluminum alloy ALMgSi 0.5 F22

The robust enclosure ensures stable operation in control cabinets exposed to vibration and elevated temperatures.

Installation Details

Mounting Method: Panel mounting via four M5 × 20 screws (included)
Electrical Connections: Industrial screw terminal blocks
Installation Orientation: Any orientation within control cabinet

Typical Applications

Steam, gas, and hydro turbine shaft vibration monitoring
Axial thrust position measurement in compressors and pumps
Shaft eccentricity and rotor dynamics analysis
Gearbox and fan rotor vibration monitoring
Machinery protection systems compliant with API 670 standards

Measuring Range Example

When paired with PR6424 extended-range probes, the CON031/914-060 supports displacement measurement up to 6.0 mm with maintained linearity of ≤ ±1.0%.

FAQ

Q: Can the CON031/914-060 be used for both vibration and position measurement?

Yes. The module supports dynamic vibration signals and static or quasi-static displacement measurements depending on probe configuration.

Q: Is the RS485 interface required for normal operation?

No. RS485 is optional and used for diagnostics or advanced configuration. Analog outputs operate independently.

Q: Does this module meet API 670 requirements?

When installed with approved probes, cables, and monitoring systems, it fully supports API 670 compliant machinery protection architectures.