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Danfoss 135N1829 VLT Midi Drive FC 280 frequency converter

135N1829 is a documented frequency converter used within an industrial automation system.

System function

Rebuilt from individual evidence

Unknown: Evidence and limits

The documented 135N1829 is a Danfoss VLT Midi Drive FC 280 frequency converter for three-phase 380-480 V motor-control applications.

The converter regulates the connected motor's electrical drive output; the exact plant controller and wiring are not documented.

Unknown: Installation-specific compatibility remains undocumented.

Exact reference
135N1829
Category
Drives / VFD
Evidence checked
2026-09-11

System role

This section explains what the product does and where it acts in the surrounding system.

Function
Receives and processes the documented signals or supply for this frequency converter.
System position
Sits in the frequency converter path between the documented upstream boundary and the controlled system boundary.
Upstream / inputs
A three-phase AC supply and the controlled motor circuit are the documented upstream and downstream boundaries.
Downstream / outputs
The converter regulates the connected motor's electrical drive output; the exact plant controller and wiring are not documented.
Limitations
Unknown: the exact installation, controller program, wiring, firmware, and commissioning parameters.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

  • The documented 135N1829 is a Danfoss VLT Midi Drive FC 280 frequency converter for three-phase 380–480 V motor-control applications.

    Confidence: medium

  • The converter regulates the connected motor's electrical drive output; the exact plant controller and wiring are not documented.

    Confidence: medium

Inferences

  • Inferred system position: 135N1829 is installed in the frequency converter path between its documented upstream signals or supply and the controlled system boundary.

    Confidence: medium

    Rationale: The exact-reference sources identify the product type and a connected system boundary; the placement statement is explicitly marked as an inference.

Unknowns

  • Unknown: the exact installation, controller program, wiring, firmware, and commissioning parameters.

    Confidence: low

    Missing evidence: No exact installation, controller program, wiring, firmware, or commissioning record was captured.

System position diagram

A signal path shows documented upstream signals or supply entering 135N1829, a frequency converter, which connects to the controlled system boundary.

Reading limit: system position only, not a wiring or safety drawing.

System position inferred from the exact-reference evidence: the frequency converter sits between the documented upstream and downstream boundaries.

Enlarged system diagram

A signal path shows documented upstream signals or supply entering 135N1829, a frequency converter, which connects to the controlled system boundary.

System position inferred from the exact-reference evidence: the frequency converter sits between the documented upstream and downstream boundaries.

View Mermaid source
flowchart LR\n  upstream["Documented upstream signals or supply"] --> unit["135N1829 frequency converter"]\n  unit --> downstream["Controlled system boundary"]
View diagram labels
Nodes
Documented upstream signals or supply; 135N1829 frequency converter; Controlled system boundary
Edges
Documented supply or signals; System output path

Next action

The captured evidence supports a concrete frequency converter role for 135N1829; installation-specific compatibility remains unknown.

Unknown: Installation-specific compatibility and connected equipment must be verified before installation or replacement.

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