Siemens 6ES7155-6AU01-0BN0 documented automation component

6ES7155-6AU01-0BN0 is documented by the cited source as IM155-6PN ST PROFINET interface module with a defined role in an industrial automation system.

System function

Rebuilt from individual evidence

Evidence and limits

The cited Siemens source identifies 6ES7155-6AU01-0BN0 as IM155-6PN ST PROFINET interface module.

The same exact-reference source documents this function and interface detail: Connects distributed I/O to PROFINET through the IM155-6PN ST interface module.

The system position is an inference from the documented interface and function; installation-specific compatibility remains unknown.

Exact reference: 6ES7155-6AU01-0BN0
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: Routes distributed I/O to PROFINET through the IM155-6PN ST interface module.
System position: Sits between the PROFINET IO controller and up to 32 distributed-I/O modules or 16 peripheral modules.
Upstream / inputs: Receives PROFINET IO communication from the upstream controller.
Downstream / outputs: Exchanges process data, diagnostics, and hot-swap status with the peripheral modules.
Limitations: Unknown: Installation-specific compatibility, wiring, firmware, project configuration, condition, and commercial status are not established by this lookup.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The cited Siemens source identifies 6ES7155-6AU01-0BN0 as IM155-6PN ST PROFINET interface module.
Confidence: high
- cache.industry.siemens.com — retrieved 2026-09-12; high confidence
The same exact-reference source documents this function and interface detail: Connects ET 200SP distributed I/O to PROFINET through the IM155-6PN ST interface module.
Confidence: high
- cache.industry.siemens.com — retrieved 2026-09-12; high confidence

Inferences

The module's system position is inferred from its documented interface and function: Sits between the PROFINET IO controller and up to 32 ET 200SP or 16 ET 200AL modules.
Confidence: medium
Rationale: The cited exact-reference identity and function evidence supports this system-path description; the placement is explicitly an inference.
- cache.industry.siemens.com — retrieved 2026-09-12; high confidence

Unknowns

Unknown: Installation-specific compatibility, wiring, firmware, and project configuration are not established by this lookup.
Confidence: low
Missing evidence: No installation-specific controller, firmware, wiring, or project configuration was captured.
Unknown: Unit condition, stock, price, lead time, repair status, warranty, and local service coverage are not established by this lookup.
Confidence: low
Missing evidence: No current unit-specific commercial or condition evidence was captured.

System position diagram

A left-to-right diagram shows the documented upstream path feeding 6ES7155-6AU01-0BN0, which connects to the documented downstream path. — System role inferred from the cited evidence for 6ES7155-6AU01-0BN0; installation-specific wiring is not asserted.

View Mermaid source

flowchart LR\n upstream["Documented upstream path"] --> module["6ES7155-6AU01-0BN0"]\n module --> downstream["Documented downstream path"]

View diagram labels

Nodes: Documented upstream path; 6ES7155-6AU01-0BN0 component; Documented downstream path
Edges: Documented input or source path; Documented output or service path

Next action

The captured evidence supports a concrete system role for 6ES7155-6AU01-0BN0; installation-specific compatibility remains an explicit unknown.

Verify the complete 6ES7155-6AU01-0BN0 marking and host-system documentation before replacement or commissioning.

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