I. Model Interpretation PR6423/003-030

PR6423: Φ8mm Eddy Current Sensor Series

003: Armored Cable - 5 meters

030: Standard Sensitivity, Standard Linear Calibration Version

CON021: EPRO Specialized Companion Pre-Amplifier, Compatible with the Entire Series of PR6423 Probes

II. Core Parameters of PR6423/003-030 Probe

Probe Diameter: 8mm

Installation Method: Threaded Fixed Type

Cable Specification: 5m double-layer shielded armored cable, with anti-tensile and anti-interference properties

Linear Measurement Range: 0 - 1.5mm

Sensitivity: 12V/mm

Standard Installation Gap: 2.5mm

Frequency Response: 0 - 12kHz

DC Resistance of Coil: 4 - 6Ω

Insulation Resistance: > 100MΩ

Operating Temperature: Probe -35℃ - +150℃, Cable -30℃ - +100℃

Compatible Materials: 42CrMo4 ferromagnetic steel, surface roughness Ra ≤ 3.2μm

III. Parameters of CON021 Preamplifier

Power Supply: -24VDC (allowable range -18 - -30VDC)

Static Output Voltage Range: -4V - -20V

Standard Working Point: When gap is 2.5mm, output is -12V

Overall Power Consumption: ≤ 2W

Frequency Response: 0 - 10kHz

Built-in Protection: Reverse connection, short circuit, open circuit protection

Installation Location: Installed in control cabinet, protection grade IP20

IV. Wiring Method

CON021 Terminal Definitions

Terminal 1: -24V power negative pole

Terminal 2: 0V power ground

Terminal 3: Signal Output (connected to TSI module MMS6110/MMS6312)

Terminal 4: Signal Common Ground

Connection between Probe and Preamplifier

PR6423 comes with LEMO aviation plug, which can be directly inserted into the CON021 interface and tightened for locking.

Shield Grounding Requirements

Only single-point grounding is required on the front-end cabinet side. The shielding layer of the probe end is suspended, and grounding at both ends is prohibited.

V. On-site Installation and Debugging Standards

Probe should be vertically aligned with the measured shaft surface, avoiding the edge of the shaft.

Initial Installation Gap Set at 2.5mm

After powering on, measure the output voltage of CON021 with a multimeter, adjust the probe position to stabilize at -12V, and then lock it.

Cable should be kept away from power lines and frequency converters, and the parallel walking distance should be ≥ 300mm. Different cable trays should be used for laying.

VI. Voltage Status Judgment (with -24VDC power supply)

Insufficient Gap: Output approaches -4V

Standard Working Point: 2.5mm corresponds to -12V

Excessive Gap: Output approaches -20V

No Voltage or Close to 0V: Probe disconnected, LEMO connector loose, power reversed

VII. Application Compatibility

Compatible Equipment: Steam turbines, compressors, fans, gas turbines

Measurement Applications: Shaft vibration, shaft displacement, eccentricity, phase monitoring

Compatible Systems: EPRO MMS6000 series, AMS6500 TSI system