Turbine Overspeed Protection Solution — EPRO MMS6312 | MMS6000 Series
Where This Product Is Used
The EPRO MMS6312 Dual Channel Rotational Speed Monitor is deployed in critical rotating machinery protection systems across heavy industry. Engineers specify this module wherever precise shaft speed measurement and overspeed trip logic are required:
- Steam & Gas Turbines — Primary overspeed protection and speed trending for power generation turbines (50–500 MW class)
- Centrifugal Compressors — Surge prevention and speed monitoring in gas processing, LNG, and petrochemical plants
- Boiler Feed Pumps — High-speed pump protection in thermal power stations
- Expanders & Turboexpanders — Speed control feedback in cryogenic and refinery applications
- Industrial Fans & Blowers — Overspeed detection in large forced-draft and induced-draft fan systems
- Marine Propulsion Systems — Shaft speed monitoring on diesel-electric and steam-driven vessels
Wherever a rotating shaft failure could cause catastrophic equipment damage or personnel injury, the MMS6312 provides the dual-channel redundancy that safety engineers demand.
Technical Specifications
- Model: MMS6312
- Series: EPRO MMS6000
- Channels: 2 independent speed measurement channels
- Input: Passive magnetic pickup (MPU) / active proximity probe compatible
- Speed Range: 0 – 20,000 RPM (configurable)
- Analog Output: 4–20 mA per channel (speed proportional)
- Relay Outputs: Configurable trip and alert relays (SPDT)
- Power Supply: 24 VDC (nominal), compatible with MMS6000 rack
- Communication: Compatible with EPRO MMS6000 system bus
- Operating Temperature: -20°C to +70°C
- Humidity: 5–95% RH, non-condensing
- Housing: DIN rail / rack-mount module (MMS6000 chassis)
- Weight: Approx. 250 g
- Certifications: CE, SIL-capable (refer to functional safety documentation)
Why Engineers Specify This Model
- Dual-Channel Redundancy: Two independent measurement channels allow 1oo2 or 2oo2 voting logic, eliminating single-point failure risk in safety-critical loops
- Wide RPM Range: Covers slow-roll (barring gear) through full-speed operation without range switching
- Flexible Sensor Compatibility: Works with both passive MPU sensors and active proximity probes — no additional signal conditioners required
- Deterministic Trip Response: Hardware-based overspeed trip relay ensures sub-millisecond response independent of software scan cycles
- Seamless MMS6000 Integration: Plug-in module architecture allows hot-swap maintenance without system shutdown
- 4–20 mA Analog Output: Direct interface to DCS, SCADA, and historian systems without additional I/O converters
- Proven Field Reliability: EPRO MMS6000 platform is installed in thousands of turbomachinery protection systems globally
Complete System Bill of Materials
A complete MMS6312-based speed monitoring loop typically includes the following components:
- MMS6312 — Dual Channel Speed Monitor Module (this item)
- MMS6000 Rack / Chassis — 19″ rack or DIN housing for module mounting
- MMS6007 / MMS6008 — Power Supply Module for MMS6000 rack
- PR6423 or PR6424 — EPRO Eddy Current Proximity Probe (sensor)
- CON021 / CON041 — Extension Cable (sensor to driver)
- PR9268 — Proximity Probe Driver / Signal Conditioner
- Keyphasor® Module (optional) — For phase reference and 1× vibration analysis
- MMS6350 / MMS6351 — Communication Gateway (Modbus/Profibus, optional)
Contact [email protected] for complete BOM assistance and cross-reference to your existing system architecture.
Compliance & Industry Standards
- API 670 — Machinery Protection Systems (5th Edition): MMS6312 is designed to meet API 670 requirements for overspeed detection systems
- IEC 61511 — Functional Safety for Safety Instrumented Systems: SIL-capable architecture supports SIL 1/2 loop assessment
- IEC 61508 — Functional Safety of E/E/PE Safety-Related Systems
- CE Marking — EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU
- ISO 10816 / ISO 20816 — Mechanical vibration evaluation (complementary standard for rotating machinery monitoring)
Quality Assurance & Sourcing
Konmask.com sources EPRO MMS6312 modules through verified industrial automation supply channels. Every unit offered is:
- Inspected for physical integrity and label authenticity prior to listing
- Stored in ESD-safe, climate-controlled warehousing
- Shipped with original manufacturer packaging where available
- Traceable to batch/lot documentation upon request
- Backed by Konmask’s sourcing guarantee — if a unit fails incoming inspection at your facility, we will replace or refund
We specialize in hard-to-find, obsolete, and long-lead EPRO / Emerson machinery protection components. If you need a factory-new unit, a tested surplus unit, or a repair/exchange, we can advise on the best option for your timeline and budget.
How to Source This Part
- Request a Quote: Email [email protected] with your required quantity, delivery location, and any urgency requirements
- Phone / WhatsApp: +0086 19859288691 — direct line to our technical sourcing team
- Purchase Online: Add to cart and proceed to checkout; we will confirm stock and lead time within 1 business day
- Bulk / Project Orders: For EPC contractors and OEMs requiring 5+ units, request a project pricing schedule
- Export & Cross-Border: We ship globally with full commercial invoice, packing list, and COO documentation for customs clearance
Application-Specific FAQ
Q: Can the MMS6312 replace an older MMS3120 or Bently Nevada 3500/25 speed monitor?
A: The MMS6312 is a native MMS6000 platform module. Direct rack-swap replacement of Bently Nevada 3500 series requires an MMS6000 chassis migration. Contact us for a migration assessment.
Q: Does the MMS6312 support zero-speed detection?
A: Yes. The module can be configured to detect zero-speed (shaft stopped) conditions and trigger an alert or trip relay, which is critical for barring gear interlock logic.
Q: What probe types are compatible?
A: The MMS6312 accepts signals from passive magnetic pickup (MPU/VR) sensors and active proximity probes (eddy current type) when used with the appropriate EPRO driver/conditioner.
Q: Is the MMS6312 suitable for SIL 2 overspeed protection?
A: The module is SIL-capable. Achieving a SIL 2 rating requires a complete loop assessment including sensor, wiring, logic solver, and final element. Consult the EPRO functional safety manual and engage a TÜV-certified functional safety engineer for your SIL verification.
Q: What is the typical lead time?
A: Stock availability varies. In-stock units ship within 2–5 business days. For out-of-stock items, lead time is typically 4–12 weeks depending on sourcing channel. Contact us for current availability.
Q: Do you provide a warranty?
A: Yes. Konmask offers a 90-day functional warranty on all tested surplus units and passes through the manufacturer warranty on factory-new stock.
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Contact: [email protected] | +0086 19859288691
