Technical Specifications
| Parameter | Specification |
| Manufacturer | EPRO (Emerson) |
| Model Number | MMS 6220 |
| Type Designation | 9100-00009 |
| Function | Dual Channel Shaft Eccentricity Monitoring |
| Sensor Inputs | 2 independent eddy current measuring chains (PR642x series) |
| Measurement Range | 0 to 8000 mV peak (Freely selectable) |
| Frequency Range | 0.017 Hz to 70 Hz (1.02 to 4200 rpm) |
| Output Signals | 0/4 to 20 mA / 0 to 10 V DC |
| Communication | RS 232 (Config) / RS 485 (Fieldbus/Modbus) |
| Power Supply | 24 VDC (18 to 31.2 V DC) |
| Temperature Range | 0 to +65°C (Operating) |
The MMS6220 is a high-performance monitoring module designed for the continuous oversight of shaft eccentricity in rotating machinery such as steam, gas, and water turbines. Utilizing non-contact eddy current technology, the module processes relative radial shaft vibration signals to provide peak-to-peak and minimum/maximum evaluations essential for turbine protection systems. Its dual-channel design allows for simultaneous monitoring of two independent points, ensuring early fault detection and enhancing the operational safety and longevity of critical industrial assets.

Product Q&A
Q: Which sensors are compatible with the MMS 6220 monitoring module? A: The module is specifically designed to work with EPRO PR642x series eddy current sensors and their associated CON series signal converters, though it can be configured for similar non-contact transducers from other manufacturers.
Q: How are the alarm limits and operating modes configured on this module? A: Configuration is performed via the front RS 232 interface using a laptop. This allows for the adjustment of four separate limit values per channel (Warning and Danger levels) and the selection of specific measuring modes.
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