055-1CB00-0BA2 Siemens LOGO! DM8 24 expansion module

055-1CB00-0BA2 Siemens LOGO! DM8 24 expansion module is documented for the Siemens LOGO! control system. Its concrete system position is stated from cited facts and marked inference.

Verified system role

Rebuilt from individual evidence

Fresh evidence identifies 055-1CB00-0BA2 as a Siemens LOGO! DM8 24 expansion module.

The Siemens certification lists 6ED1 055-1CB00-0BA2 as LOGO! DM8 24, the code family corresponding to the exact suffix 055-1CB00-0BA2.

Inferred system position: the expansion module sits between 24 V field wiring and the Siemens LOGO! controller program.

Exact reference: 055-1CB00-0BA2
Category: PLC / CPU
Evidence checked: 2026-09-11

System role

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

Function: The expansion module receives digital inputs and switches digital outputs in a Siemens LOGO! system.
System position: Inferred system position: the expansion module sits between 24 V field wiring and the Siemens LOGO! controller program.
Upstream / inputs: Upstream input: 24 V DC field signals and LOGO! controller power reach the expansion module.
Downstream / outputs: Downstream output: digital module states and switched outputs are available to the LOGO! control program.
Limitations: Unknown: installation-specific compatibility, firmware, condition, and replacement suitability are not established by the captured sources.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The cited source identifies 055-1CB00-0BA2 as a Siemens LOGO! DM8 24 expansion module.
Confidence: high
- cache.industry.siemens.com — retrieved 2026-09-11; high confidence
The Siemens certification lists 6ED1 055-1CB00-0BA2 as LOGO! DM8 24, the code family corresponding to the exact suffix 055-1CB00-0BA2.
Confidence: high
- cache.industry.siemens.com — retrieved 2026-09-11; high confidence

Inferences

Inferred system position: the expansion module sits between 24 V field wiring and the Siemens LOGO! controller program.
Confidence: medium
Rationale: The Siemens certification identifies the exact 6ED1 055-1CB00-0BA2 code as LOGO! DM8 24; the selected suffix is preserved as the exact catalog reference and the I/O chain is an inference.
- cache.industry.siemens.com — retrieved 2026-09-11; high confidence

Unknowns

Unknown: installation-specific compatibility, firmware, condition, and replacement suitability are not established by the captured sources.
Confidence: low
Missing evidence: A confirmed installed-system configuration, revision, condition report, and replacement assessment.

System position diagram

Diagram showing 055-1CB00-0BA2 between upstream equipment and downstream control or load. — System position inferred from the cited role and evidence.

View Mermaid source

flowchart LR\n  Upstream["Upstream equipment"] --> Component["055-1CB00-0BA2"]\n  Component --> Downstream["Downstream control or load"]

View diagram labels

Nodes: 055-1CB00-0BA2 in the documented Siemens LOGO! control system; Downstream control or load
Edges: Evidence-backed system connection

Next action

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