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MMS6140

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EPRO MMS6140 calculates absolute shaft vibration from one eddy-current shaft channel and one bearing-vibration channel.
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Technical specifications for MMS6140

  • Manufacturer:
    Emerson
  • Part Number:
    MMS6140
  • Product Family:
    Epro
  • Product Type:
    Absolute Shaft Vibration Monitor
  • Stock:
    1
  • Channel 1:
    Eddy-current relative shaft vibration
  • Channel 2:
    Seismic or piezoelectric absolute bearing vibration
  • Combined function:
    Phase-compensated difference for absolute shaft vibration
  • Frequency ranges:
    1 to 250 Hz and 5 to 2000 Hz, configuration-dependent
  • Power consumption:
    Maximum 8 W; 300 mA at 24 VDC
  • Supply voltage:
    18 to 31.2 VDC; nominal 24 VDC
  • Configuration interface:
    RS232 on module front
  • System interface:
    RS485; up to 31 modules / 62 channels per bus
  • Module protection:
    IP00; front plate IP21
  • Operating temperature:
    0 to 65°C
  • Storage and transport temperature:
    -30 to 85°C
  • Relative humidity:
    5 to 95%, non-condensing
  • Dimensions:
    3.0 × 12.84 × 16.0 cm
  • Weight:
    0.32 kg
  • Tariff Code:
    9031809090
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Channel Assignment Signal Combination Protection Checks Application
  • Combine relative shaft and bearing motion only when both axes match
  • Treat channel 1 and channel 2 as different sensor interfaces
  • Verify phase, polarity and scale before trusting the combined value

EPRO MMS6140 measures absolute shaft vibration by combining relative shaft motion with absolute bearing motion from two different sensor principles.

Channel 1 uses an eddy-current chain and channel 2 uses a seismic or piezoelectric sensor; phase compensation and subtraction produce the combined absolute shaft signal.

Before replacement, document both sensor chains, phase and polarity conventions, filters, sensitivities, combination mode, alarms, outputs, relay logic, bypasses and rack configuration.

Availability, condition, price, and shipping time for MMS6140 are confirmed during quotation.

Emerson MMS6140 Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Connect the eddy-current chain to the shaft channel
  • Connect the seismic or piezoelectric sensor to the bearing channel
  • Match both sensors to the same machine axis and location
  • Preserve phase compensation and polarity
  • Use compatible filter ranges and engineering units
  • Check individual channels before evaluating the difference
  • Prove each individual alarm path
  • Validate the combined absolute-shaft output
  • Restore relays and bypasses under controlled conditions
  • Absolute shaft vibration protection on large turbines
  • Combined rotor and bearing-motion monitoring on compressors
  • Machinery diagnostics requiring relative-to-absolute vibration conversion
Description
MMS6140 is an Emerson/epro MMS 6000 monitor for calculated absolute shaft vibration.

Channel 1 processes eddy-current relative shaft motion, while channel 2 processes seismic or piezoelectric bearing motion; the configured frequency ranges are 1 to 250 Hz and 5 to 2000 Hz.

Confirm that both sensors reference the same axis and location, then verify phase, polarity, scale and filter settings before enabling protection.
Alternative Names
MMS6140 MMS 6140 EPRO MMS6140 EPRO MMS 6140 Emerson EPRO MMS6140 MMS 6000 MMS6140
Technical notes
MMS6140 is not two identical vibration channels. Channel 1 and channel 2 use different sensor principles; absolute-shaft calculation depends on correct phase, polarity and scale.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
When should EPRO MMS6140 be selected instead of separate shaft and casing monitors?
Use it when the protection or diagnostic variable is absolute shaft vibration derived from simultaneous relative-shaft and bearing-motion measurements.
Can the two inputs of EPRO MMS6140 be wired to identical sensors?
No assumption should be made. Channel 1 is for an eddy-current chain and channel 2 is for a seismic or piezoelectric sensor with different supply and signal requirements.
Why can EPRO MMS6140 show an implausible combined value when both individual channels look correct?
Check polarity, phase compensation, scale, filter ranges, channel assignment and whether the sensors measure the same axis and mechanical location.
What must be preserved before replacing EPRO MMS6140?
Save both sensor models, sensitivities, polarities, filters, combination mode, phase settings, limits, output mappings, relay logic and bypass state.
Can EPRO MMS6140 be used with only one channel connected?
The official design allows single-channel operation, but the resulting variable is then relative shaft or bearing vibration rather than the combined absolute-shaft measurement.
What installation error most often invalidates EPRO MMS6140 absolute-shaft calculation?
Using sensors on different axes or locations, reversing polarity, or mismatching filters and scales prevents meaningful subtraction of the two motions.
How should EPRO MMS6140 be validated after installation?
Compare both raw channels independently, verify phase and polarity with a controlled machine condition, then confirm the combined output, alarms and relays against approved reference data.