STBACI0320K - Schneider Electric Modicon STB analog input kit

Schneider Electric Modicon STB analog input kit with a documented system role and explicit evidence boundaries.

Documented function

Rebuilt from individual evidence

System position

Unknown: Evidence boundary

Schneider Electric identifies STBACI0320K as a standard Modicon STB analog input kit for four 4 to 20 mA inputs with 15 bits plus sign.

The exact kit is documented for the Modicon STB series.

The kit sits at the field-input side of a Modicon STB island, between transmitters and the island controller or network.

Unknown: The installed STB base, network coupler, transmitter wiring, scaling, and site-specific compatibility are not established by the captured sources.

Exact reference: STBACI0320K
Category: PLC / CPU
Evidence checked: 2026-09-12

System role

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

Function: Converts four 4 to 20 mA field signals into input data for the Modicon STB island.
System position: Sits at the field-input side of a Modicon STB island, between transmitters and the island controller or network.
Upstream / inputs: Receives four 4 to 20 mA signals from field transmitters.
Downstream / outputs: Passes measured channel data to the Modicon STB island controller or network.
Limitations: Unknown: The installed STB base, network coupler, transmitter wiring, scaling, and site-specific compatibility are not established by the captured sources.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

Schneider Electric identifies STBACI0320K as a standard Modicon STB analog input kit for four 4 to 20 mA inputs with 15 bits plus sign.
Confidence: high
- www.se.com — retrieved 2026-09-12; high confidence
- www.digikey.ca — retrieved 2026-09-12; medium confidence
The exact kit is documented for the Modicon STB series.
Confidence: high
- www.se.com — retrieved 2026-09-12; high confidence
- www.digikey.ca — retrieved 2026-09-12; medium confidence

Inferences

The kit sits at the field-input side of a Modicon STB island, between transmitters and the island controller or network.
Confidence: medium
Rationale: The product is identified as an analog input kit for the STB series; the stated field-to-controller position follows from that documented input role.
- www.se.com — retrieved 2026-09-12; high confidence
- www.digikey.ca — retrieved 2026-09-12; medium confidence

Unknowns

Unknown: The installed STB base, network coupler, transmitter wiring, scaling, and site-specific compatibility are not established by the captured sources.
Confidence: low
Missing evidence: The installed STB base, network coupler, transmitter wiring, scaling, and site-specific compatibility are not established by the captured sources.

System position diagram

Diagram showing STBACI0320K between 4 to 20 mA field transmitters and Modicon STB island controller. — System position of STBACI0320K from the captured evidence.

View Mermaid source

flowchart LR
  upstream["4 to 20 mA field transmitters"] --> item["STBACI0320K"]
  item --> downstream["Modicon STB island controller"]

View diagram labels

Nodes: 4 to 20 mA field transmitters; STBACI0320K; Modicon STB island controller
Edges: Documented upstream connection; Documented downstream function

Next action

Decision: The evidence supports STBACI0320K as a four-channel Modicon STB analog input kit with a concrete field-to-controller role; verify the installed island before replacement.

Next action: Match the exact kit, STB base, network coupler, signal wiring, and scaling against the cited Schneider Electric documentation.

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