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MMS6250

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EPRO MMS6250 is the individual shaft-displacement monitor used in three-channel DAPS axial-position protection systems.
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Technical specifications for MMS6250

  • Manufacturer:
    Emerson
  • Part Number:
    MMS6250
  • Product Family:
    Epro
  • Product Type:
    DAPS Shaft Displacement Protection Monitor
  • Stock:
    1
  • Sensor input:
    Eddy-current measuring chain; range depends on installed sensor
  • Signal frequency range:
    0 to 10 Hz
  • Current outputs:
    0/4 to 20 mA; direction configurable
  • System capabilities:
    Three-channel comparison, self-test and 2-out-of-3 relay logic
  • Hot swap:
    Boards can be exchanged during operation under approved procedure
  • Mating hardware:
    Backplane, frame, terminals and cables are separate system items
  • 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 System Composition Channel Matching Proof Test Application
  • Treat the monitor as one channel of a three-channel DAPS system
  • Match the exact display and PROFIBUS variant before ordering
  • Control hot swap and proof testing through the approved safety procedure

EPRO MMS6250 is a shaft-displacement protection monitor used as one of three channels in an epro DAPS axial-position protection system.

A complete DAPS installation combines three monitors with the specified backplane, frame, terminals and cables to provide channel comparison, fault detection and two-out-of-three trip logic.

Before replacement, identify the exact DAPS system line, monitor position, probe chain, mechanical zero, channel comparison, limit and trip logic, backplane wiring, bypass state and proof-test records.

Availability, condition, price, and shipping time for MMS6250 are confirmed during quotation.

Emerson MMS6250 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.

  • Use three matched monitors in the approved DAPS architecture
  • Confirm backplane, frame, terminal and cable part numbers
  • Identify display and PROFIBUS options separately
  • Restore probe chain, mechanical zero and output direction
  • Preserve six limit values and channel-comparison settings
  • Match monitor position to the backplane wiring
  • Authorize bypass before removing a live channel
  • Test fault detection and two-out-of-three voting
  • Record all results and restore full protection coverage
  • Turbine axial-position and thrust protection
  • Three-channel shaft-displacement shutdown systems
  • Modernization of mechanical axial-position protection using DAPS
Description
MMS6250 is an Emerson/epro DAPS shaft-displacement protection monitor for axial-position protection.

A complete DAPS system uses three MMS6250 monitors with channel comparison, self-test and 2-out-of-3 relay logic.

Confirm the approved backplane, frame, terminal and cable arrangement, then preserve mechanical zero, output direction, limits and bypass controls.
Alternative Names
MMS6250 MMS 6250 EPRO MMS6250 EPRO MMS 6250 Emerson EPRO MMS6250 MMS 6000 MMS6250
Technical notes
MMS6250 is one protection channel, not a complete DAPS system. Do not assume the backplane, frame, terminals, cables, display or PROFIBUS options are included with the monitor.
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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.
Is EPRO MMS6250 a complete three-channel DAPS system?
No. A complete system uses three monitors plus the documented backplane, frame, screw terminals, cables and configuration accessories.
Can EPRO MMS6250 replace an MMS6250D or MMS6250D/DP directly?
Not automatically. Display and PROFIBUS variants differ; confirm the exact system line, firmware application, backplane, front access and host communication.
What must be matched before replacing one EPRO MMS6250 channel?
Match probe and converter, mechanical zero, monitor position, current-output direction, six limit values, channel-comparison logic, relay voting and backplane wiring.
Can EPRO MMS6250 be hot-swapped without reducing turbine protection?
Only under the approved DAPS bypass and maintenance procedure; removing one channel changes the active voting and must be controlled and documented.
Why can a new EPRO MMS6250 disagree with the other two channels?
Check sensor gap and polarity, scale, mechanical reference, current-output feedback, channel calibration, backplane connections and the loaded firmware application.
What should be inspected if EPRO MMS6250 reports a sensor fault?
Check the complete eddy-current chain, supply, signal range, terminals, cable continuity, probe gap, target condition and whether the channel remains within the permitted operating window.
How should EPRO MMS6250 be proof-tested after replacement?
Inject controlled shaft-position values, verify channel comparison and fault detection, prove every Alert and trip output including two-out-of-three voting, then remove bypasses and record results.