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Emerson EPRO MMS6120 Dual Channel Bearing Vibration Monitor Module for Turbomachinery Protection & Condition Monitoring
Product Description
The Emerson EPRO MMS6120 is a high-precision dual-channel bearing vibration monitor module engineered for continuous health monitoring and protection of turbomachinery, including steam turbines, gas turbines, compressors, fans, gearboxes, and centrifuges. As a core component of the EPRO MMS 6000 protection system, this rugged module features two galvanically isolated inputs for electrodynamic vibration velocity sensors (PR 9266/PR 9268 series), supporting measurement ranges from 5 mm/s to 100 mm/s (vibration velocity VRMS) and corresponding vibration displacement (±25 μm to ±500 μm Spp/Sop). With a standard frequency range of 10 Hz to 1000 Hz (VDI 2056 compliant), 10-bit measurement resolution, ±2% reading accuracy, redundant 24 VDC power inputs, built-in sensor self-test, extended diagnostics, password-protected configuration levels, and RS-232/RS-485 communication ports for data readout and integration, it delivers reliable performance in harsh industrial environments with IP20 front-panel protection, wide temperature operation (-20°C to +60°C), and hot-swap compatibility for module replacement without system shutdown, meeting API 670, VDI 2056/2059 international standards for turbomachinery protection.

Key Functions
The MMS6120 dual-channel monitor delivers mission-critical turbomachinery protection with these core features: Dual independent channel monitoring for bearing vibration velocity/displacement with galvanic isolation to prevent ground loops and EMI interference; Configurable alarm/danger thresholds with "Danger" mode operation for immediate protection actions (trip/alert); Built-in sensor self-test and extended diagnostics for proactive maintenance and fault isolation; Redundant 24 VDC power inputs for zero-downtime operation; RS-232 local configuration interface and RS-485 network interface for integration with DCS, SCADA, predictive maintenance systems, and fieldbus networks; Hot-swap compatible design for module replacement without system shutdown; Password-protected configuration levels to prevent unauthorized changes; Support for VRMS (Veff), Sop (zero-peak), and Spp (peak-peak) output formats for seamless integration with data acquisition and analysis tools.

Application Scenarios
The Emerson EPRO MMS6120 is optimized for turbomachinery protection and condition monitoring applications requiring dual-channel precision vibration measurement, including: Power generation plants (thermal, hydro, nuclear) with turbine/generator bearing protection; Oil & gas upstream/midstream processing with compressor and pump health monitoring; Chemical and petrochemical refineries with turbomachinery protection systems; Pulp & paper, cement, and mining industries with fan and centrifuge monitoring; Marine propulsion systems with main engine and gearbox vibration protection; Predictive maintenance programs integrating vibration data with asset management software; Retrofit projects for legacy turbomachinery protection systems upgrading to MMS 6000 platform for enhanced diagnostics and reliability.

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Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Dual-Channel Bearing Vibration Monitor Module (MMS 6000 System) |
| Manufacturer | Emerson (EPRO Automation Division) |
| Model Number | MMS6120 |
| Compatible Sensors | Electrodynamic Vibration Velocity Sensors (PR 9266, PR 9268 Series) |
| Measurement Range | Vibration Velocity: 5 mm/s to 100 mm/s VRMS; Vibration Displacement: ±25 μm to ±500 μm (Spp/Sop) |
| Frequency Range | 10 Hz to 1000 Hz (VDI 2056 Compliant); Extended 5 Hz to 1600 Hz Optional |
| Input & Isolation | 2 Independent Galvanically Isolated Inputs; Input Resistance >100 kΩ; Input Voltage Range -5 V to +15 V DC |
| Communication Interfaces | RS-232 (Local Configuration), RS-485 (Network Integration); Supports MODBUS RTU |
| Power Supply | Redundant 24 V DC Inputs (19.2 V DC to 30 V DC); Overvoltage/Overcurrent Protection |
| Operating Conditions | -20°C to +60°C, IP20 Front Panel, Hot-Swap Compatible, Industrial-Grade EMI/RFI Shielding |
- Global Inventory: 121 shared inventories worldwide, enabling direct procurement from overseas warehouses for faster delivery.
- Pricing & After-Sales: Competitive prices plus reliable after-sales warranty services.
- Customer Coverage: Serving clients across United States, Germany, Japan, South Korea, United Kingdom, France, Italy, Canada, Brazil, India, Australia, Russia, Spain, Netherlands, Switzerland, Sweden, Belgium, Austria, and Turkey.
- Product Quality: All items are brand new and original. Spare parts include a 1-year warranty, and all products are tested and certified.
- Discounts: Contact us for bulk-order discounts. We also offer further price adjustments if you receive lower quotes for identical products from other suppliers.


