Product Short Description
Product Introduction The EPRO MMS6220 is a dual-channel eccentricity monitoring module from the MMS 6000 machine monitoring system family. It processes radial shaft vibration signals from eddy current sensors to measure eccentricity peak-to-peak values and minimum/maximum gap distances. Equipped with an integrated microcontroller, the module performs signal evaluation, data recording, and self-diagnostic functions, and supports configuration and data readout via serial communication interfaces.
Description
Technical Specifications
- Input Channels: 2 independent eddy current input channels
- Input Type: Differential, galvanically isolated
- Input Impedance: 100 kΩ
- Input Voltage Range: –1 to –23 VDC
- Signal Voltage Range: 0–400 mVpeak (minimum) up to 8000 mVpeak (maximum)
- Supply Voltage: –26.7 VDC nominal
- Typical Current Consumption: 20 mA; maximum 35 mA
- Output: 2 channels of 0–10 V voltage output, 10-bit resolution
- Communication Interfaces: RS232 (configuration), RS485 (system integration)
- Operating Temperature: -20°C to +60°C
- Weight: 1.3 kg
- Isolation: Fully isolated output buffers; short-circuit and open-circuit proof
Functional Features
- Two fully independent eddy-current measuring chains
- Integrated microcontroller for data processing and configuration
- Records and stores characteristic values from the last run-up and run-down cycles
- Self-test functions for electronic circuits and transducers
- Warning and danger limit thresholds with configurable delay times
- 24 V logic inputs for mode selection and monitor locking
- One pulse per revolution input for phase reference
- Compatible with EPRO PR 642X series eddy current sensors with CON0X1 preamplifiers
Application Scenarios
- Turbine and compressor shaft eccentricity monitoring
- Rotating machinery vibration displacement measurement
- Industrial rotating equipment protection systems
- Machinery diagnostic and analysis systems
- Predictive maintenance for steam, gas, and water turbines
- Power generation, petrochemical, and manufacturing industries
Working Principle The module receives non-contact displacement signals from eddy current sensors mounted near the shaft. It processes these signals to calculate peak-to-peak eccentricity values and dynamic gap variations. The integrated microcontroller performs filtering, threshold comparison, and data logging, while providing analog output signals for integration with control systems.
Installation Requirements
- Install in MMS 6000 series rack chassis
- Ensure proper mating with backplane connectors
- Connect shielded sensor cables to corresponding input terminals
- Provide stable DC power supply within specified voltage range
- Maintain ambient temperature within operating limits
Operating Notes
- Configure parameters via RS232 interface using dedicated configuration software
- Perform periodic sensor and module calibration to ensure accuracy
- Verify proper grounding to avoid electromagnetic interference
- Do not exceed maximum input voltage levels to prevent circuit damage
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