Emerson EPRO MMS6220 Turbomachinery Eccentricity Card

Availability: 99 left in stock

Product Overview The Emerson EPRO MMS6220 functions as a specialized dual-channel monitor within the MMS6000 machinery protection system, specifically engineered for Eccentricity and Shaft Vibration measurements....

SKU: MMS6220

Manufacturer: Emerson
Product No.: MMS6220
Product Type: Radial Displacement
Product Origin: USA
Payment:T/T, Western Union
Weight: 1300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Product Overview

The Emerson EPRO MMS6220 functions as a specialized dual-channel monitor within the MMS6000 machinery protection system, specifically engineered for Eccentricity and Shaft Vibration measurements. It captures critical radial displacement data from non-contact eddy current probes (PR6422/PR6423 series). This module plays a vital role during turbine startup and coast-down phases by detecting shaft bowing or thermal warping before the machine reaches operational speeds. We provide this unit as 100% Brand New and Factory Sealed, ensuring maximum protection for your high-value rotating assets.

Technical Specifications

The MMS6220 provides high-resolution signal conditioning for precision mechanical diagnostics.

Parameter	Specification
Input Channels	2 Independent Channels (Redundant or Dual-path)
Measurement Modes	Shaft Eccentricity, Radial Vibration, Peak-to-Peak
Compatible Sensors	PR6422, PR6423, PR6424, PR6425 (Eddy Current)
Signal Output	0 – 10 V DC (Conditioned Analog)
Digital Interface	RS-485 (Standard) / Optional Profibus DP-V1
Power Input	+24 V DC Nominal (+18V to +31.2V DC)
Operating Temp	-20 °C to +70 °C
Dimensions	7.6 cm x 5.1 cm x 35.6 cm
Weight	1.3 kg

Engineering Advantages

Critical Startup Monitoring: The MMS6220 calculates shaft eccentricity at low rotational speeds. This feature prevents operators from accelerating a "bowed" shaft, which would otherwise cause catastrophic bearing failure or blade rubs at critical speeds.
Dual-Channel Orbit Analysis: By processing two orthogonal sensor inputs, the module allows for the generation of shaft orbit plots. This visual data enables engineers to distinguish between unbalance, oil whip, and mechanical looseness.
Integrated Signal Filtering: The module incorporates digital tracking filters that isolate specific vibration frequencies. This ensures the output reflects true mechanical movement rather than electrical noise or surface imperfections on the shaft.
Dynamic Drift Compensation: The internal circuitry compensates for the thermal expansion of sensor cables and probe housings during the extreme temperature shifts common in steam turbine environments.

FAQs

How does the MMS6220 differ from the MMS6110?

The MMS6220 includes specific firmware for Eccentricity measurement, which focuses on the maximum peak-to-peak displacement at very low speeds. While both monitor vibration, the MMS6220 is essential for large turbine thermal growth and startup cycles.
Can I use this module with active Hall-effect sensors?

No. The MMS6220 is designed specifically for Eddy Current Proximity Probes (Passive or Active Proximitor systems). It requires the inductive signal profile provided by the PR642x series to calculate distance and displacement accurately.
What is the significance of the "Gap Voltage" on this module?

The Gap Voltage indicates the physical distance between the probe tip and the shaft. For the MMS6220 to function correctly, you must set the probe in the center of its linear range (typically -10V DC). You can monitor this voltage through the front panel test points or the RS-485 interface.
Is this unit a direct replacement for older EPRO monitors?

The MMS6220 fits the MMS6000 rack system. If you are upgrading from an older MMS3000 system, you will require the corresponding MMS6000 backplane and configuration software to ensure communication compatibility.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.