Siemens 6ES7400-1TA01-0AA0 S7-400 UR1 18-slot rack

The Siemens 6ES7400-1TA01-0AA0 S7-400 UR1 18-slot rack is an 18-slot S7-400 rack for central or distributed stations.

System function

Rebuilt from individual evidence

System position

Evidence and limits

6ES7400-1TA01-0AA0 is identified in the source as a SIMATIC S7-400 UR1 rack with 18 slots for central or distributed use and provision for two redundant power supplies.

Routes S7-400 backplane communication and P-bus connections while housing controller and I/O modules.

System position: at the center of an S7-400 station, between power supplies and plugged-in CPU, communication and I/O modules.

Unknown: the installed module population, power-supply arrangement, wiring, and physical condition are not established by the source.

Exact reference: 6ES7400-1TA01-0AA0
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 S7-400 backplane communication and P-bus connections while housing controller and I/O modules.
System position: Sits at the center of an S7-400 station, between power supplies and plugged-in CPU, communication and I/O modules.
Upstream / inputs: S7-400 power supplies provide the rack's module power path.
Downstream / outputs: Plugged-in CPU, communication and I/O modules use the rack's communication and P buses.
Limitations: Unknown: the installed module population, power-supply arrangement, wiring, and physical condition are not established by the source.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The source identifies 6ES7400-1TA01-0AA0 as a SIMATIC S7-400 UR1 rack with 18 slots for central or distributed use and provision for two redundant power supplies.
Confidence: high
- support.industry.siemens.com — retrieved 2026-09-12; high confidence
The source documents that 6ES7400-1TA01-0AA0 routes S7-400 backplane communication and P-bus connections while housing controller and I/O modules.
Confidence: high
- support.industry.siemens.com — retrieved 2026-09-12; high confidence

Inferences

Inference: 6ES7400-1TA01-0AA0 occupies this system position: at the center of an S7-400 station, between power supplies and plugged-in CPU, communication and I/O modules.
Confidence: medium
Rationale: The source identifies the exact reference and documents its interfaces or rack relationship.
- support.industry.siemens.com — retrieved 2026-09-12; high confidence

Unknowns

Unknown: the installed module population, power-supply arrangement, wiring, and physical condition are not established by the source.
Confidence: low
Missing evidence: The source describes the product design, not the installed unit, configuration or physical condition.

System position diagram

A system path places 6ES7400-1TA01-0AA0 between an upstream system and a downstream system. — The source-supported position of 6ES7400-1TA01-0AA0 connects the upstream system to the downstream system.

View Mermaid source

flowchart LR
  upstream["Upstream system"] --> product["6ES7400-1TA01-0AA0"]
  product --> downstream["Downstream system"]

View diagram labels

Nodes: Upstream system; 6ES7400-1TA01-0AA0; Downstream system
Edges: Documented signal or power path; System connection

Next action

The evidence supports a concrete system role for 6ES7400-1TA01-0AA0.

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