Emerson Epro CON021 + PR6423/003-130 Eddy Current Measuring System

Configured for non-contact shaft displacement and vibration measurement, the Emerson Epro CON021 + PR6423/003-130 (CON021 signal converter and PR6423/003-130 proximity probe) converts eddy-current impedance variation into an electrical output proportional to mechanical displacement.

Hardware Specifications

Emerson Epro Process Instrumentation Characteristics

The CON021 processes the impedance change generated by the PR6423/003-130 probe. It produces a proportional electrical output for displacement-related monitoring.

The converter provides a frequency response from 0 to 20,000 Hz at -3 dB, with a rise time below 15 us. Therefore, the signal path can reproduce high-frequency shaft vibration components without relying on mechanical contact.

The PR6423/003-130 uses eddy-current sensing for non-contact measurement. Consequently, the probe can monitor shaft motion without introducing physical loading between the sensor and rotating target.

For installation, maintain the specified probe-to-target relationship and verify the electrical signal after mounting. In addition, route the transducer cable separately from high-current switching conductors to reduce induced interference.

The supplied data does not specify 4-20 mA HART communication, FOUNDATION Fieldbus, Profibus PA, or channel-to-channel isolation for this configuration. These functions should therefore not be assigned to the CON021 + PR6423/003-130 system without additional documentation.

Frequently Asked Questions

Q: What type of measurement does the PR6423/003-130 perform?
A: It performs non-contact eddy-current measurement of radial and axial shaft displacement, vibration, position, and eccentricity.

Q: What output ranges does the CON021 support according to the supplied data?
A: The converter supports -4 V to -20 V output with -23 V to -32 V supply, or -2 V to -18 V output with -21 V to -32 V supply.

Q: How does the CON021 connect to the proximity probe?
A: The transducer connects through a self-locking LEMO plug, while supply and output connections use screw terminals accepting up to 1.5 mm2 conductors.

Field Installation Guidelines

1. Mount the PR6423/003-130 so the sensing face maintains the required mechanical clearance from the rotating target.
2. Secure the probe against mechanical movement after establishing the measurement position.
3. Connect the probe to the CON021 using the specified self-locking LEMO connection.
4. Terminate supply and output wiring at the CON021 screw terminals.
5. Separate probe wiring from high-current power cables, contactors, and switching circuits where practical.
6. Use appropriate cable shielding and terminate the shield according to the installed monitoring-system grounding scheme.
7. Verify supply polarity and voltage before energizing the converter.
8. Confirm the converter output corresponds to the expected mechanical position before placing the monitored machine into service.
9. Protect the IP20 converter enclosure from direct exposure to water, oil, dust, and other environmental contaminants.
10. Do not assign unspecified communication, isolation, or diagnostic functions without confirming them against the applicable Emerson Epro documentation.