Siemens 6AV6671-8XJ00-0AX0 RS422/TTY converter for SIMATIC S5

6AV6671-8XJ00-0AX0 is a Siemens RS422/TTY converter for SIMATIC S5 whose documented system role is converts RS422 signals from a compatible SIMATIC HMI interface to TTY signals for a SIMATIC S5 controller.

System function

Rebuilt from individual evidence

Evidence and limits

6AV6671-8XJ00-0AX0 is a Siemens RS422/TTY converter for SIMATIC S5.

In the documented system path, it converts RS422 signals from a compatible SIMATIC HMI interface to TTY signals for a SIMATIC S5 controller.

The source evidence supports the product identity and system role; installation-specific compatibility remains an explicit unknown.

Exact reference: 6AV6671-8XJ00-0AX0
Category: HMI / Display
Evidence checked: 2026-09-12

System role

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

Function: Converts RS422 signals from a compatible SIMATIC HMI interface to TTY signals for a SIMATIC S5 controller.
System position: Sits between a SIMATIC HMI RS422/RS485 interface and the SIMATIC S5 controller's TTY interface.
Upstream / inputs: A SIMATIC HMI RS422/RS485 interface provides the upstream serial signal.
Downstream / outputs: The SIMATIC S5 controller receives the converted TTY signal through the device-side interface.
Limitations: Unknown: installation-specific compatibility, firmware or project configuration, replacement suitability, and current commercial availability were not established by this individual research.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The source identifies 6AV6671-8XJ00-0AX0 as RS422/TTY converter for SIMATIC S5.
Confidence: high
- files.kempstoncontrols.com — retrieved 2026-09-12; high confidence
Converts RS422 signals from a compatible SIMATIC HMI interface to TTY signals for a SIMATIC S5 controller.
Confidence: medium
- files.kempstoncontrols.com — retrieved 2026-09-12; high confidence

Inferences

Inferred system position: Sits between the operator or machine process and the host automation system as the rs422/tty converter for simatic s5 interface.
Confidence: medium
Rationale: The source identifies the exact part and describes its concrete product function; the placement in this system path is an explicit inference from those facts.
- files.kempstoncontrols.com — retrieved 2026-09-12; high confidence

Unknowns

Unknown: installation-specific compatibility, firmware or project configuration, replacement suitability, and current commercial availability were not established by this individual research.
Confidence: low
Missing evidence: No installation-specific controller, firmware, project, replacement, or current commercial evidence was captured.

System position diagram

A left-to-right signal path shows an operator or machine process connected through 6AV6671-8XJ00-0AX0 to a host automation system. — System role inferred from the exact-reference evidence: 6AV6671-8XJ00-0AX0 connects the documented upstream process to the host automation system.

View Mermaid source

flowchart LR
  upstream["Operator or machine process"] -->|documented inputs| product["6AV6671-8XJ00-0AX0"]
  product -->|documented output| downstream["Host automation system"]

View diagram labels

Nodes: Operator or machine process; 6AV6671-8XJ00-0AX0 RS422/TTY converter for SIMATIC S5; Host automation system
Edges: documented inputs; documented output

Next action

The captured evidence supports a concrete system role for 6AV6671-8XJ00-0AX0; installation-specific limits remain explicit unknowns.

Verify the complete 6AV6671-8XJ00-0AX0 reference, installed system interfaces, and project configuration before replacement or commissioning.

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