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    Apter Power can provide Honeywell MLI-DR28UA/DC for verified MasterLogic 50 control requirements, with current quotation, sourcing support and delivery planning for the requested quantity.

MLI-DR28UA/DC

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Honeywell MLI-DR28UA/DC is a MasterLogic 50 plc base module with analog i/o with 16 digital inputs, 12 relay outputs and 24 V DC power.
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Technical specifications for MLI-DR28UA/DC

  • Manufacturer:
    Honeywell
  • Part Number:
    MLI-DR28UA/DC
  • Product Family:
    Honeywell MasterLogic-50
  • Product Type:
    PLC base module with analog I/O
  • Stock:
    1
  • Power supply:
    24 V DC
  • Digital inputs:
    16 channels, 24 V DC
  • Digital outputs:
    12 channels
  • Output stage:
    Relay, relay contacts
  • Analog I/O:
    8 analog I/O points
  • Ethernet interface:
    1 built-in FEnet port
  • Serial networking:
    2 built-in Snet channels
  • Base-unit class:
    IEC U high-performance analog DC base unit
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • 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 I/O Data Communications Programming Installation Check

Product overview:

  • Integrated processor with 24 V DC power input
  • 16 digital inputs and 12 relay outputs
  • IEC U high-performance analog DC base unit for IEC 61131-3 control

MLI-DR28UA/DC combines controller processing, local digital I/O and its power stage in one compact Honeywell MasterLogic 50 assembly.

The relay contacts output arrangement must be matched to field polarity, load behavior and protective devices before wiring.

Communication planning covers 1 built-in FEnet port together with 2 built-in Snet channels.

Apter Power can provide Honeywell MLI-DR28UA/DC for verified replacement and new-project requirements.

Verified resources for Honeywell MLI-DR28UA/DC:

I/O data:

  • Digital inputs: 16 channels at 24 V DC
  • Digital outputs: 12 channels
  • Output circuit: Relay, relay contacts

The onboard allocation of MLI-DR28UA/DC should be checked against the application point list and physical terminal map.

Expansion channels are engineered separately from the base-unit count and must agree with the saved project.

Communications:

  • Ethernet resource: 1 built-in FEnet port
  • Serial resource: 2 built-in Snet channels
  • Retain verified addresses, protocols and cable assignments

Communication interfaces on MLI-DR28UA/DC support engineering and system data exchange appropriate to the configured MasterLogic network.

Test every required peer, supervisory and programming connection after hardware replacement.

Programming:

  • IEC 61131-3 control project
  • Preserve the validated program and parameter backup
  • Match hardware, firmware and I/O assignments

Load only the approved MLI-DR28UA/DC application after confirming the target hardware configuration.

Review diagnostics and perform controlled functional tests before enabling automatic operation.

Installation check:

  • Isolate power and identify every conductor
  • Verify supply, grounding, commons and terminal torque
  • Prove all I/O, communication and safety responses

After fitting MLI-DR28UA/DC, compare actual field voltage and load behavior with the documented design.

Record the installed revision, project backup, measured supply and commissioning results.

Description

MLI-DR28UA/DC is a Honeywell MasterLogic 50 plc base module with analog i/o with an integrated processor, 24 V DC power input, 16 24 V DC digital inputs and 12 relay outputs. The compact assembly combines controller execution, power conversion and local I/O for machine, utility and sequence-control applications. It also provides 8 analog i/o points for local mixed-signal control.

The MLI-DR28UA/DC provides 28 onboard digital points before compatible expansion I/O is counted. The 12 relay channels provide contact switching for appropriately rated field circuits. Load voltage, steady current, inrush, switching frequency and suppression must be checked for every connected device. Communication resources include 1 built-in FEnet port and 2 built-in Snet channels, so addressing and network parameters should be retained during replacement.

Before installing the MLI-DR28UA/DC, verify the complete nameplate, power class, terminal allocation, I/O commons, output wiring, connected expansion hardware, firmware level and approved application backup. Commissioning should include insulation and grounding checks, point-by-point I/O tests, controller diagnostics, communication tests and a controlled proof of the final machine sequence.

Alternative Names
MLI-DR28UA/DC MLI DR28UA DC MLIDR28UADC Honeywell MLI-DR28UA/DC Honeywell MLI DR28UA DC Honeywell MasterLogic 50 MLI-DR28UA/DC MLI-DR28UA/DC PLC base module Honeywell MLI-DR28UA/DC CPU I/O module
Technical notes
MLI-DR28UA/DC combines a 24 V DC supply, 16 digital inputs and 12 relay outputs in one Honeywell MasterLogic 50 base unit. Match the 8 analog i/o points, Ethernet and Snet settings together with field I/O wiring and the retained control project before commissioning.
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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.
What power source is required for MLI-DR28UA/DC?
Use 24 V DC as marked for this base unit, with the documented protective device, grounding and available current verified before energization.
How are the 16 digital inputs on MLI-DR28UA/DC checked?
Confirm 24 V DC field polarity and the input common, then measure OFF and ON voltage at the terminal under the actual cable and contact conditions.
How should the relay outputs on MLI-DR28UA/DC be protected?
Check the load voltage, steady current, inductive or capacitive inrush and switching frequency, then use branch protection and suppression suitable for the connected device.
Which communication checks apply to MLI-DR28UA/DC?
Document the existing addressing and cabling for 1 built-in FEnet port and 2 built-in Snet channels; restore only verified parameters and prove peer, supervisory and engineering access after replacement.
How should the analog I/O on MLI-DR28UA/DC be commissioned?
Confirm each channel mode, signal range, common and shield routing, then test scaling and diagnostics against a traceable field signal before enabling control actions.
Can another MasterLogic 50 base unit directly replace MLI-DR28UA/DC?
Only after matching 24 V DC, the 16/12 I/O allocation, relay behavior, terminal layout, communications, firmware and application memory.
What tests are required after installing MLI-DR28UA/DC?
Inspect terminal torque, insulation, grounding and field power, test every input and output under controlled conditions, review diagnostics and prove the safe sequence before return to service.
What information is needed to quote MLI-DR28UA/DC?
Provide the exact nameplate, hardware and firmware revision, supply, connected I/O and communication details, expansion modules, quantity, destination and requested delivery date.

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