Overview
Configured for digital overspeed monitoring in turbine protection systems, the EPRO MMS6350/DP (MMS6350 Digital Overspeed Protection System) processes shaft-speed signals and provides dynamic outputs with a PROFIBUS-DP interface. The unit supports input frequencies up to 16 kHz and specifies a response time below 10 ms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MMS6350/DP |
| Brand | EPRO |
| Device Type | Digital Overspeed Protection System with PROFIBUS-DP |
| Safety Certification | SIL3 according to DIN EN 61508 |
| Input Voltage Range | 0 to 30 VDC |
| Input Resistance | >100 kOhm |
| Input Frequency Range | 0 to 16 kHz, -3 dB |
| Dynamic Output Frequency | 0 Hz to 20 kHz |
| Dynamic Outputs | TTL level, 5 VSS |
| Communication Protocol | PROFIBUS-DP |
| Response Time | <10 ms |
| Measurement Accuracy | +/-0.1% |
| Resolution | 0.1 rpm |
| Power Supply | 24 VDC |
| Operating Temp | -40 deg C to +70 deg C |
| Dimensions | 3.1 cm x 19 cm x 12.9 cm |
| Weight | 0.2 kg |
Digital Overspeed Protection and PROFIBUS-DP Interface
The MMS6350/DP receives electrical speed-related input signals within the specified 0 to 16 kHz input range. It processes the frequency signal for overspeed monitoring and provides dynamic outputs with a specified frequency range up to 20 kHz.
The module also provides PROFIBUS-DP communication for integration with a supervisory control or monitoring network. Therefore, the physical speed signal remains the primary measurement input, while the digital network provides system-level data communication.
The specified response time of less than 10 ms defines the stated signal-processing response characteristic. The 0.1 rpm resolution and +/-0.1% measurement accuracy define the supplied measurement specifications.
The SIL3 designation according to DIN EN 61508 identifies the stated functional-safety certification level. Installation and application must follow the applicable safety-system design and certification requirements.
Frequently Asked Questions
Q: What input frequency range does the MMS6350/DP support?
A: The specified input frequency range is 0 to 16 kHz at -3 dB.
Q: What communication interface does the MMS6350/DP provide?
A: The module provides a PROFIBUS-DP communication interface for digital system communication.
Q: What is the specified response time?
A: The specified response time is less than 10 ms.
Field Installation Guidelines
Install the MMS6350/DP according to the equipment documentation and the requirements of the applicable overspeed protection system.
Use the specified 24 VDC power supply and verify supply polarity before energizing the module. Keep speed-signal wiring separate from high-voltage power conductors and other sources of electrical interference.
Terminate signal shields according to the plant grounding design. Avoid unnecessary shield loops and maintain consistent grounding practices across connected equipment.
For PROFIBUS-DP wiring, follow the applicable PROFIBUS installation rules for cable routing, shielding, termination, and network topology. Verify communication wiring before placing the protection function into service.
Before commissioning, verify the input signal range, dynamic output behavior, PROFIBUS-DP communication, alarm or trip logic, and the complete overspeed protection chain. Do not apply unverified test signals to an active protection system.
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