EPRO MMS6120 9100-00002C-08

Description

Product Description

The EPRO MMS6120 9100-00002C-08 is a sophisticated monitoring module from the EPRO (now part of Baker Hughes) PR 642x/.. series, specifically designed for machinery condition monitoring and protection. This module, the EPRO MMS6120 9100-00002C-08, is a dual-channel monitor that processes signals from eddy current proximity probes or accelerometers to measure relative shaft vibration, absolute shaft vibration (via a seismic channel), axial position (thrust), or speed (Keyphasor). Its primary function is to continuously analyze these signals, providing precise measurement values, generating alarms (Alert, Danger), and initiating protective shutdowns to prevent catastrophic damage to rotating equipment like turbines, compressors, and large pumps. The EPRO MMS6120 9100-00002C-08 is a cornerstone of predictive maintenance and machinery safety systems.

Product Parameters

The technical specifications for the EPRO MMS6120 9100-00002C-08 monitoring module are defined for precision measurement:

• Module Type: Dual-Channel Vibration/Position Monitor (e.g., for relative vibration, absolute vibration, axial position).

• Input Channels: Two independent, configurable input channels. Each channel accepts signals from:

  • Eddy current proximity probes (e.g., PR 642x series) for relative vibration or position.

  • Seismic transducers (e.g., PR 9268 accelerometer with converter) for absolute vibration.

• Measured Variables: Configurable per channel for: relative vibration (peak-to-peak, µm), absolute vibration (velocity, mm/s), axial position (thrust, mm), or speed via Keyphasor.

• Signal Processing: Includes adjustable band-pass filtering, integration/differentiation, and True Peak-to-Peak detection.

• Dynamic Range: High dynamic range for accurate measurement from very low to very high vibration levels.

• Alarm Setpoints: Two independent, adjustable alarm setpoints per channel (Alert, Danger) with configurable delay timers and latching functions.

• Outputs: Provides 4-20 mA analog outputs proportional to the measured variable per channel, and relay outputs for alarms and OK status.

• Communications: Equipped with RS-232/RS-485 serial interface for connection to configuration software (e.g., EPRO PR 3xxx CONNECT) and supervisory systems.

• Power Supply: Typically 24 V DC.

Advantages and Features

The EPRO MMS6120 9100-00002C-08 offers distinct advantages for machinery protection:

• High Accuracy and Reliability: The EPRO MMS6120 9100-00002C-08 is engineered for precise and stable measurement, providing trustworthy data for both protection and long-term trend analysis, which is critical for predictive maintenance strategies.

• Flexible Configuration: Each channel can be independently configured for different measurement tasks (e.g., Channel 1 for radial vibration, Channel 2 for axial position), making the module versatile and reducing hardware inventory.

• Advanced Diagnostic Functions: Features comprehensive self-diagnostics and sensor diagnostics, including gap voltage monitoring for proximity probes, cable break detection, and module health checks.

• Robust Industrial Design: Built to withstand the electrical noise, vibration, and temperature extremes found in power generation and heavy industrial environments.

• Proven Technology and Standards Compliance: Based on EPRO’s field-proven technology and complies with international standards for machinery protection (API 670, ISO 10816).

Application Cases in Industry

This monitor is essential for protecting high-value rotating equipment across critical industries:

• Steam and Gas Turbines: Monitors shaft vibration and axial displacement on turbine-generator sets to prevent bearing wear and catastrophic blade failure.

• Centrifugal and Axial Compressors: Measures radial vibration and thrust position on critical process compressors in oil & gas, petrochemical, and air separation plants.

• Large Boiler Feed Pumps: Protects against cavitation and imbalance by monitoring pump shaft vibration in power generation and water treatment facilities.

• Electric Motors and Generators: Used on large drive motors and synchronous generators to detect developing faults like rotor eccentricity or bearing issues.

• Geared Systems: Monitors vibration on high-speed pinions and gearboxes in turbomachinery trains.

Comparisons with Competing Products

When compared to general-purpose PLC analog input cards or other vibration monitoring systems, the EPRO MMS6120 9100-00002C-08 provides specialized, protection-grade functionality:

• Protection vs. Monitoring: The EPRO MMS6120 9100-00002C-08 is a dedicated protection device with certified response times, fail-safe relay logic, and high diagnostic coverage. A PLC card is for basic monitoring and lacks the deterministic, safety-focused design.

• Sophisticated Signal Processing: It performs specialized signal conditioning (filtering, True P-P) essential for accurate vibration analysis. A PLC would require complex, custom-coded function blocks to approximate this, with less reliability.

• Sensor-Specific Integration: The module is specifically designed to power and interface with EPRO’s range of proximity probes and seismic sensors, providing optimal performance and full diagnostic support for the sensor loop.

• Regulatory Acceptance: In many industries (e.g., power, oil & gas), the use of certified machinery protection systems like the MMS6120 is a regulatory or insurance requirement for critical equipment, which a PLC-based solution cannot satisfy.

Selection Suggestions and Precautions

Correct configuration and installation are critical for effective protection:

1. Define the Measurement Task: Clearly specify what each channel of the EPRO MMS6120 9100-00002C-08 will measure (e.g., vibration, position). This dictates the sensor type and configuration.

2. Select Compatible Sensors: Use only EPRO-recommended proximity probes (e.g., PR 6423) and cables. The module’s performance is predicated on using the correct sensor with the proper calibration data.

3. Proper Installation and Gap Setting: For proximity probes, the mechanical installation (mounting, gap setting) is as important as the electronics. Follow EPRO guidelines precisely to ensure accurate signals.

4. Mandatory Software Configuration: The module must be configured using the EPRO PR 3xxx CONNECT software (or similar). Parameters like measurement type, range, filter settings, and alarm setpoints are set here. It is not operational out of the box.

5. Calibration and Commissioning: After installation, perform a calibration check using the configuration software. Verify the 4-20 mA output scaling and test the alarm relay functionality by simulating trip conditions.

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