Overview
The Emerson EPRO CON020/91, also cataloged as the CON020/91 Signal Converter, operates as a dedicated hardware component for converting eddy current probe signals into proportional electrical outputs within machinery protection and monitoring systems.
The unit processes high-frequency signals from compatible EPRO proximity probes and provides displacement-related measurement outputs for connection to control, protection, or diagnostic systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | CON020/91 |
| Brand | Emerson EPRO |
| Origin | Germany |
| Operating Temp | -30 deg C to +85 deg C |
| Input | EPRO eddy current sensor probe signal input |
| Output Signal | 4-20 mA proportional output and buffered AC vibration output |
| Mounting Type | DIN-rail mounting |
| Measurement Principle | Eddy current displacement signal conversion |
| Frequency Response | 0 Hz to 10 kHz (-3 dB) |
| Linear Measuring Range | Based on connected probe characteristics |
DCS Instrumentation Signal Interface Characteristics
The Emerson EPRO CON020/91 functions as a signal conditioning component within eddy current measurement loops. It receives probe oscillator signals and converts them into standardized electrical outputs for integration with monitoring or control equipment.
The converter supports signal transmission paths commonly used in industrial instrumentation systems, including 4-20 mA current loops and buffered dynamic outputs. Channel signal integrity depends on correct probe matching, cable installation, shielding, and grounding practices.
For process control integration, the signal path can be connected to PLC or DCS analog input channels. Proper channel-to-channel isolation at the receiving system helps prevent measurement interference between multiple monitoring circuits.
Frequently Asked Questions
Q: What type of sensor probe is compatible with the CON020/91?
A: The CON020/91 is designed for use with compatible Emerson EPRO eddy current proximity probes, including PR642 series sensors. Probe selection must match the required measurement range and application configuration.
Q: Does the CON020/91 provide a direct vibration output signal?
A: The unit provides a buffered AC output for dynamic signal analysis when configured as part of an eddy current vibration measurement chain.
Q: Can the CON020/91 be installed in a control cabinet?
A: Yes. The DIN-rail mounting design allows installation inside industrial control cabinets with appropriate wiring separation, shielding, and environmental protection.
Field Installation Guidelines
Install the CON020/91 on a suitable DIN rail inside a protected control cabinet. Keep probe cables separated from high-voltage power wiring and variable frequency drive cables to reduce electromagnetic interference.
Connect cable shields according to the system grounding design. Maintain correct polarity for power and signal connections before energizing the measurement loop.
Verify the connected probe type, cable length, and calibration parameters before commissioning. The probe gap voltage, output scaling, and monitoring channel configuration should be checked against the machinery protection system requirements.
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