Siemens 6SN1118-0NH00-0AA2 SIMODRIVE 611 universal two-axis control unit

The Siemens-origin datasheet identifies 6SN1118-0NH00-0AA2 as a SIMODRIVE 611 universal digital control unit for two axes, optical encoders, speed control, and analog setpoint interfaces for listed standard motors.

Documented product role

Rebuilt from individual evidence

The board sits between the analog command path, optical encoder feedback, and the SIMODRIVE 611 power section for up to two axes.

Unknown: installation-specific compatibility, firmware, wiring, and unit condition require separate verification.

Exact reference: 6SN1118-0NH00-0AA2
Category: Drives / VFD
Evidence checked: 2026-09-12

System role

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

Function: Controls up to two axes in the SIMODRIVE 611 universal drive system.
System position: Sits in the SIMODRIVE 611 universal drive path between the analog command path, encoder feedback, and the power section.
Upstream / inputs: Receives analog setpoint commands and optical encoder feedback.
Downstream / outputs: Regulates the connected axes through the SIMODRIVE 611 power section.
Limitations: Unknown: installation-specific compatibility, firmware, wiring, and unit condition require separate verification.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The Siemens-origin datasheet identifies 6SN1118-0NH00-0AA2 as a SIMODRIVE 611 universal digital control unit for two axes, optical encoders, speed control, and analog setpoint interfaces for listed standard motors.
Confidence: high
- support.industry.siemens.com — retrieved 2026-09-12; high confidence
- www.botworksautomation.com — retrieved 2026-09-12; high confidence

Inferences

The board sits between the analog command path, optical encoder feedback, and the SIMODRIVE 611 power section for up to two axes.
Confidence: medium
Rationale: The system position follows from the exact reference description and the documented interfaces or drive-system context.
- support.industry.siemens.com — retrieved 2026-09-12; high confidence
- www.botworksautomation.com — retrieved 2026-09-12; high confidence

Unknowns

Unknown: installation-specific compatibility, firmware, wiring, and unit condition require separate verification.
Confidence: low
Missing evidence: The individual lookup does not establish the installed topology, firmware state, wiring, or physical unit condition.

System position diagram

A flow from the upstream system through 6SN1118-0NH00-0AA2 to the downstream system. — The diagram places 6SN1118-0NH00-0AA2 in the documented industrial control path.

View Mermaid source

flowchart LR
  upstream["Upstream system"] --> product["6SN1118-0NH00-0AA2"]
  product --> downstream["Downstream system"]

View diagram labels

Nodes: Upstream system; 6SN1118-0NH00-0AA2 SIMODRIVE 611 universal two-axis control unit; Downstream system
Edges: Documented control path; Inferred system position

Next action

Use this reference when the installed SIMODRIVE 611 universal system requires the documented two-axis optical-encoder control unit.

Confirm the complete order code, installed system, wiring, and firmware before replacement or commissioning.

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