Description

EPRO MMS6210 Product Overview

The EPRO MMS6210 is a dual-channel module designed by EPRO specifically for vibration monitoring of rotating equipment.Simply put,it’s a”vibration data processor+alarm.”Vibration signals collected by eddy current sensors are converted into intuitive parameters such as displacement,velocity,and acceleration.These signals are then transmitted to a DCS or digital display via a 4-20mA signal.Simultaneously,built-in alarm logic monitors whether these parameters exceed specified limits.If so,relays are triggered,shutting down the equipment to protect it.

We’ve seen this in a catalytic cracking unit at a petrochemical plant.The conventional monitoring module they previously used only measured displacement and often displayed inaccurate readings.One time,when the compressor’s vibration exceeded the specified limit,no alarm sounded,nearly causing the rotor to fail.After switching to the MMS6210,it not only measures both displacement and velocity,but also allows for customizable alarm thresholds.An alarm is triggered if the vibration exceeds 0.15mm(peak-to-peak),and a shutdown occurs if it exceeds 0.2mm.The plant has experienced no safety incidents in two years.Its dual-channel design is particularly practical,allowing a single module to monitor both bearings of a compressor,saving cabinet space and costs.

Whether it’s installing a vibration protection system on new equipment or upgrading an existing system,the MMS6210 adapts directly.It supports eddy current sensors with a variety of sensitivities,eliminating the need to replace hardware,simply modifying parameters.Even an experienced electrician can install and debug the system in just half a day,saving significant time.

Main Features and Advantages

Dual-Channel+Multi-Parameter,Comprehensive Monitoring

Common single-channel modules can only measure one bearing and only display displacement.The MMS6210’s dual-channel design allows simultaneous monitoring of two bearings,with each channel capable of measuring displacement,velocity,and acceleration.This means one module can replace six standard modules.A steel plant’s blast furnace fan uses this module to monitor both front and rear bearings.It triggers an alarm if the speed exceeds 10mm/s and shuts down if the displacement exceeds 0.12mm.As a result,the fan has never been damaged by excessive vibration,and the maintenance technicians say,”With complete data,I have peace of mind.”SIL 2 Safety Certification,Reliable Fault Protection

Unreliable protection modules for rotating equipment can lead to serious accidents.The MMS6210,certified to IEC 61508 SIL 2,offers extremely low failure rates for alarm and shutdown logic.Even minor faults in the module itself will not trigger a false shutdown.A thermal power plant uses it for vibration protection on its steam turbines.Once,the module’s communication interface failed,but the vibration monitoring and alarm functions remained functional,without affecting unit operation.Replacement was only required during a maintenance outage.This is exceptionally reliable.

Strong interference resistance,remarkably stable in harsh environments

Electromagnetic interference and temperature fluctuations in industrial sites pose significant challenges to monitoring modules.The MMS6210 boasts a 2500Vrms isolation rating,making it immune to interference even when adjacent to a frequency converter.Its 4-20mA output signal is remarkably stable.Operating in temperatures from-20°C to+60°C,it can withstand both winter-hardened steam turbine plants in northern China and summer-hardened compressor workshops in southern China.The circulating compressor module of a coal chemical enterprise was installed in a control cabinet with a temperature of 55°C.It ran continuously for three years without any data loss.

High-Reliability Vibration Monitoring for Critical Machinery

The EPRO MMS6210 is a dual-channel vibration monitoring and protection module engineered for critical rotating machinery such as turbines,compressors,and pumps.It simultaneously processes signals from two eddy current sensors,converting raw data into actionable parameters—displacement(peak-to-peak),velocity(RMS),and acceleration(peak)—with±0.5%full-scale accuracy.

Certified to IEC 61508 SIL 2,it ensures reliable fault detection and protection,with user-configurable alarm/trip thresholds and two relay outputs for emergency shutdown.Its robust design withstands electromagnetic interference(EMI)and temperature fluctuations(-20°C to+60°C),making it suitable for harsh industrial environments in power generation,petrochemicals,and metallurgy.

With RS485 Modbus communication for remote configuration and 4-20mA outputs for integration with DCS systems,the MMS6210 simplifies Condition monitoring.Its space-saving DIN rail mounting and dual-channel design reduce cabinet footprint,while compatibility with various eddy current sensors minimizes retrofitting costs—making it a trusted choice for both new installations and legacy system upgrades.

Application Areas

Power Generation Industry:Steam Turbine Vibration”Guardian”

Excessive vibration in thermal power plant steam turbines can burn bearings and even cause runaway accidents.The MMS6210 is installed near the turbine’s radial bearings,with a vibration sensor connected to each channel.It monitors bearing displacement and triggers an alarm when the displacement exceeds 0.25mm(peak-to-peak);if it exceeds 0.3mm,the system is shut down.After using this sensor at a 1000MW thermal power plant,the number of unplanned turbine shutdowns decreased from two per year to zero,saving over 4 million yuan in losses per shutdown.

Chemical Industry:Compressor Failure”Early Warning”

Excessive vibration in centrifugal compressors in the chemical industry can lead to seal failure and gas leakage.The MMS6210 monitors the vibration speed of the front and rear bearings of a compressor.When the speed exceeds 15 mm/s(effective value),an alarm is triggered to alert maintenance personnel for inspection;if it exceeds 20 mm/s,the system shuts down for protection.Using this device,a methanol plant’s syngas compressor detected a rotor imbalance fault two weeks in advance,preventing compressor seizure,saving over 1.5 million yuan in repair costs,and reducing raw material waste.

Metallurgical Industry:A Vibration”Guardian”for Fans and Pumps

Excessive vibration in steel plant blast furnace fans and rolling mill water pumps can lead to equipment damage and production interruptions.The MMS6210 is suitable for vibration monitoring of these equipment.Using this device,a steel plant’s blast furnace fan triggered an alarm when the vibration speed exceeded 12 mm/s,allowing maintenance personnel to promptly adjust the fan balance,avoiding a sudden blower shutdown that would have caused a blast furnace outage.This reduced losses by over 1 million yuan and improved production efficiency.

Selection Guide/Purchasing Recommendations

When choosing the MMS6210,first consider the sensor:If the eddy-current sensor you’re using has a sensitivity of 8mm/V or 4mm/V,choose the standard version.If it requires a different sensitivity(such as 2mm/V),you must inform the manufacturer in advance and flash the corresponding firmware to prevent inaccurate measurements.

Next,consider your protection requirements:If your equipment requires SIL 2 safety certification,the MMS6210 is a perfect fit.For general monitoring,its functionality is sufficient,eliminating the need for additional modules.Regarding the number of channels,one module is sufficient for two bearings per device;for four bearings,two modules are sufficient for convenient networking.

Finally,avoid refurbished products!This module is critical to equipment safety.Refurbished products may contain second-hand relays and sampling circuits,which can lead to false alarms or even no alarms.A small factory bought a refurbished MMS6210 because they were looking for a bargain.The compressor vibrated excessively but didn’t shut down,resulting in the rotor failing and a loss of over 800,000 yuan.Shenzhen Changxin[www.cnplcdcs.com]only sells genuine,original products with an 18-month warranty,so you can trust your products!

FAQ

Q:Can the EPRO MMS6210 connect to an accelerometer?

A:By default,no!It’s designed for eddy current sensors(for measuring displacement).If you’re connecting a piezoelectric accelerometer,you need to add a signal conditioning module to convert the acceleration signal into a voltage before connecting it to the MMS6210.Otherwise,the module won’t recognize the signal and won’t measure anything.

Q:How can I customize the measurement range for 4-20mA?For example,I could set 4mA to 0μm and 20mA to 1000μm.

A:Use EPRO configuration software(such as VibroSuite)to connect to the module via RS485.Enter the”Output Settings”interface,select the corresponding channel,set the”4mA Corresponding Value”to 0μm,and the”20mA Corresponding Value”to 1000μm.Save the settings and you’re done!No hardware modifications are required,making this extremely convenient.A technician at a chemical plant even did it himself using a laptop,without having to contact the manufacturer.

Q:The module reports a”Sensor Fault”error.How do I troubleshoot?

A:First,check the sensor power supply to see if the preamplifier is receiving 24V DC.Then,check the sensor wiring and use a multimeter to test the signal cable for shorts or breaks.If the wiring is fine,try replacing a working sensor.If the error persists,the module channel is faulty and needs to be repaired or replaced.In most cases,the sensor wiring is loose;reconnecting it will resolve the issue.

Q:Can the relay output directly control motor shutdown?

A:It cannot be directly connected to high currents!The module’s relay contacts have a maximum current rating of 5A.If the motor current exceeds 5A,contactor control is required.The relay contacts control the contactor coil,while the contactor’s main contacts control the motor power supply.This ensures both protection for the module relay and a safe shutdown.A power plant’s turbine shutdown circuit is wired this way,with no issues.

Customer Case Study/Successful Application Analysis

A petrochemical plant in East China previously used a standard vibration module on the main fan of a catalytic cracking unit.This module only measured displacement and frequently triggered false alarms.One such module caused a four-hour shutdown and resulted in losses of over 1.2 million yuan.Another time,the vibration exceeded the limit but no alarm was issued,resulting in wear on the fan bearings and repairs costing over 600,000 yuan.Later,we switched to the EPRO MMS6210.First,its dual-channel design solved the problem of monitoring front and rear bearings,enabling a single module to handle the entire task.Second,it could simultaneously measure displacement and velocity,providing more comprehensive data.Alarm thresholds were set at 0.15mm(peak-to-peak)for displacement and 12mm/s(effective value)for velocity.Exceeding these thresholds triggered an alarm,while exceeding 0.2mm or 15mm/s caused a shutdown.Once,a slight imbalance in the fan rotor caused vibration to rise to 0.16mm.The module immediately triggered an alarm,and maintenance personnel promptly adjusted the issue without disrupting production.

After two years of operation,this fan has not failed due to vibration,and the number of false alarms has dropped from 10 per year to 0.The unit’s continuous operating time has increased from 300 days to 350 days,significantly increasing production and generating over 5 million yuan in additional revenue.The factory has now replaced the other eight critical fans with the EPRO MMS6210.

Related Products

EPRO MMS6220:A three-channel version of the MMS6210,suitable for monitoring equipment with three bearings(such as large water pumps).

EPRO PR6423:An eddy current sensor,perfectly compatible with the MMS6210,with a sensitivity of 8mm/V,measures radial vibration.

EPRO PR6424:An axial displacement sensor,compatible with the MMS6210,monitors axial displacement of equipment.

Phoenix Contact QUINT4-PS/1AC/24DC/10:A 24V DC power supply module provides stable power to the MMS6210.

EPRO VibroSuite:Configuration software for MMS6210 parameter settings,data collection,and fault diagnosis.

ABB ACS880-04:A frequency converter,compatible with the MMS6210,reduces speed to protect the equipment when vibration exceeds a specified limit.

SICK PA300:Digital display,connects to the MMS6210’s 4-20mA signal,and visually displays vibration data without connecting to a DCS.

Installation and Maintenance

Pre-installation Preparation:Before installing the MMS6210,ensure the temperature inside the control cabinet is between-20°C and+60°C,and the humidity is≤95%(non-condensing).Prepare a 35mm DIN rail and ensure a secure installation.Check the 24V DC power supply voltage,ensuring fluctuations do not exceed±15%.Organize the sensor signal cables,power cables,and output cables,and label them(e.g.,”Fan Front Bearing-Channel 1″)to facilitate later traceability.

Installation Process:Snap the module onto the DIN rail and gently push it to secure.Connect the power cables(L+to 24V+,M to 24V-),being careful not to connect them reversed,as this will burn the module.Connect the sensor signal cables(each channel to the corresponding sensor’s signal output and ground).Connect the 4-20mA output cable and relay cable.After powering on,use the configuration software to connect the module,set the sensor sensitivity,measurement parameters,and alarm thresholds,and test each channel’s signal for normal operation.

Maintenance Recommendations:Check the module status monthly using the software for any fault codes.Quarterly,check for loose terminals,especially sensor signal cables,which are prone to loosening in high-vibration environments.Calibrate the accuracy annually using a standard signal source.If the error exceeds±0.5%,adjust the module using the software.If the module reports an error,first check the external device,then the module.Do not blindly replace the module—this module is very durable,and most faults are external.

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