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EPRO MMS6220
EPRO MMS6220

EPRO MMS3120/022-000

Product Introduction​
EPRO MMS3120/022-000 is a dual-channel vibration monitoring device for rotating machinery protection and condition monitoring. It processes signals from seismic velocity or acceleration sensors and, in configured variants, from eddy-current proximity probes. The module converts raw vibration data into standardized outputs for DCS, PLC, or machinery protection systems and supports alarm management for predictive maintenance.
Category:
Description
Technical Specifications​
Input channels: 2 independent channels
Sensor compatibility: seismic sensors PR9268 series; eddy-current probes PR6422 to PR6425 in configured variants
Measurement parameters: displacement in micrometres, velocity in millimetres per second, peak/peak-to-peak according to configuration
Frequency response: approximately 1 Hz to 10 kHz depending on sensor type
Output signals: isolated 4–20 mA per channel; alarm relay outputs in rack monitor configuration
Power supply: 18–36 V DC for field transmitter variant; 24 V DC or 115/230 V AC according to rack configuration
Operating temperature: -20 °C to +65 °C
Housing material: aluminium alloy housing for field transmitter version; printed circuit board with metal front plate for rack version
Protection classification: IP65 for sealed field transmitter variant; rack module protection according to MMS3000 enclosure
Compliance: API 670 and VDI 2056 machinery monitoring practices
Functional Features​
Dual independent signal conditioning prevents cross-channel interference. Configurable alarm setpoints provide alert and danger protection. Buffered sensor outputs support portable analyzers. Software configuration enables range scaling, time delay, hysteresis, and fault detection.
Working Principle​
The vibration sensor generates an electrical signal proportional to shaft or casing motion. The module conditions the signal through amplification, filtering, and demodulation, calculates vibration amplitude, compares the result with preset limits, and transmits analog values with relay status to the control system.
Application Scenarios​
Steam turbines, gas turbines, centrifugal compressors, generators, pumps, fans, and critical rotating equipment in power, oil and gas, petrochemical, and manufacturing plants.
Structural Characteristics​
Modular electronics mounted on multilayer PCB, galvanic isolation between sensor input and output loop, aluminium or rack-metal enclosure, front-panel indicators for power and fault, DIP or software configuration interface.
Installation Requirements​
Mount the transmitter vertically or in the designated MMS rack slot. Use shielded sensor cables with separate grounding at the earthing point. Maintain physical separation between vibration signal cables and high-voltage power cables. Verify 4–20 mA loop load resistance before energizing.
Usage Precautions​
Perform gap and zero calibration before commissioning. Inspect sensor integrity, cable continuity, and power supply regularly. Install surge protection in high-EMI areas. Avoid condensation by ensuring proper enclosure ventilation.
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