Overview
The Emerson EPRO CON021/916-200 + PR6426/000-130, also cataloged as the CON021/916-200 signal converter system, operates as a dedicated hardware component for non-contact shaft displacement and vibration measurement within EPRO eddy-current monitoring systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | CON021/916-200 + PR6426/000-130 |
| Brand | Emerson EPRO |
| Origin | Germany |
| Weight | 0.48 kg |
| Dimensions | 16.5 x 24 x 4.4 cm |
| Operating Temp | PR6426/000-130 sensor: -35 deg C to +180 deg C |
| Power Consumption | -24 VDC nominal supply |
| Measurement Principle | Non-contact eddy-current displacement measurement |
| Sensor Type | PR6426 series eddy-current probe |
| Converter Protection Class | IP20 |
| Output Signal | DC voltage with superimposed AC vibration signal |
| Output Range | -4 V to -20 V linear range, maximum -1 V to -22 V |
| Output Impedance | 100 kOhm |
| Frequency Response | 0 to 20 kHz (-3 dB) |
| Sensor Connection | LEMO connector |
| Signal Connection | Screw terminals for power and output |
Emerson EPRO Eddy-Current Measurement Technology
The CON021/916-200 converter supplies excitation for the PR6426/000-130 eddy-current probe and converts electromagnetic field variations into proportional electrical signals. The measurement chain processes the distance change between the probe tip and conductive shaft surface, allowing evaluation of radial vibration, axial displacement, and shaft position.
The matched probe, extension cable, and converter configuration maintains calibrated signal behavior across the complete measurement path. The PR6426 sensor uses a stainless-steel housing design for installation near rotating equipment bearing locations where mechanical vibration, oil exposure, and temperature variations are present.
For EPRO machinery protection applications, the eddy-current measurement loop requires correct probe scaling, gap voltage validation, and signal conditioning to maintain rotor dynamics monitoring accuracy. The converter output provides the proportional vibration and displacement signal required by turbine supervisory instrumentation and condition monitoring systems.
Frequently Asked Questions
Q: What measurement principle does the PR6426/000-130 sensor use?
A: The PR6426/000-130 uses non-contact eddy-current technology. It measures the electrical impedance change caused by the distance variation between the probe tip and a conductive target surface.
Q: What is the function of the CON021/916-200 converter in the measurement chain?
A: The CON021/916-200 provides probe excitation and converts the high-frequency electromagnetic response from the sensor into a proportional DC voltage output with an AC vibration component.
Q: Does the system require mechanical contact with the rotating shaft?
A: No. The eddy-current probe operates without physical contact, which eliminates direct wear between the sensor and the monitored rotating component.
Field Installation Guidelines
Install the PR6426/000-130 probe with a stable mechanical mounting arrangement and maintain the specified measurement gap according to the EPRO calibration requirements. The probe tip should face the conductive target surface without mechanical interference.
Route the sensor cable separately from high-current power wiring and electromagnetic noise sources. Use proper cable shielding and connect the shield according to the monitoring system grounding practice.
Before commissioning, verify the converter power supply, probe connection, output polarity, and signal response. Confirm the gap voltage and vibration output behavior through the connected machinery protection or monitoring system before placing the measurement channel into service.
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