EPRO MMS6350 MMS6000 Series Overspeed Module
The EPRO MMS6350, also cataloged as the MMS6350 Overspeed Module, operates as a dedicated hardware component for dual-channel rotational speed monitoring and overspeed protection within MMS6000 turbomachinery control systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MMS6350 |
| Brand | EPRO (Emerson) |
| Origin | Germany |
| Weight | 0.65 kg |
| Dimensions | 100 x 160 x 30 mm |
| Operating Temp | -20 to +65 deg C |
| Power Consumption | Redundant dual supply inputs |
| Input Signal Types | Pulse, analog, and discrete signals |
| Output Signal Types | Relay contact outputs, analog (0/4-20 mA) outputs |
| Sensor Compatibility | PR6423/011-000, PR6424/000-121, and PR642X eddy current probes |
| Communication Ports | PROFIBUS-DP, RS-485, Modbus RTU protocols |
Rotor Dynamics & Gap Voltage Validation
The MMS6350 module executes high-speed frequency calculations and eddy-current probe scaling to process raw pulse trains from eddy current proximity sensors into actionable speed measurements. Continuous gap voltage validation ensures the physical offset between the probe tip and target wheel teeth remains within optimal target boundaries, preventing false overspeed trip activations caused by axial rotor float or lateral mechanical shaft runout. By evaluating dynamic pulse intervals alongside DC bias levels, the internal logic tracks critical rotor dynamics phenomena during acceleration and decelerating speed ramp profiles.
Frequently Asked Questions
Q: How does the front panel digital display assist technicians during diagnostic routines?
A: The front panel digital display provides direct local visualization of real-time rotational speed, measured gap voltage, and alarm trip states without requiring external programming equipment.
Q: What output mechanism triggers trip actions during an overspeed condition?
A: The module activates onboard hardwired relay contact outputs configured for fast trip execution, simultaneously transmitting current values over 0/4-20 mA analog loops and PROFIBUS-DP communication networks.
Field Installation Guidelines
Slide the MMS6350 card into its dedicated slot inside the MMS6000 rack enclosure, confirming that top and bottom retention screws engage securely with the card cage. Ground the overall cabinet and backplane rack to a single-point earth bus to mitigate electromagnetic interference.
Connect incoming speed probe field wires using twisted, shielded cable pairs. Terminate cable shields at the cabinet shield bar, keeping shield drain wires ungrounded at the sensor end to eliminate ground loop current paths. Set up trip limit thresholds and field network address parameters using the system software tool before placing the module into active protective monitoring mode.
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| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
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