Omron NT11S-SF121B 4-by-20 alphanumeric terminal

The Omron catalog identifies NT11S-SF121B as the black NT11S 4-by-20 alphanumeric programmable terminal. The catalog records 160 x 64 dot display capacity and Host Link or NT Link communication for the NT11S terminal.

Documented system function and position

Rebuilt from individual evidence

The Omron catalog identifies NT11S-SF121B as the black NT11S 4-by-20 alphanumeric programmable terminal.

The catalog records 160 x 64 dot display capacity and Host Link or NT Link communication for the NT11S terminal.

Sits at the operator panel between the operator and the connected PLC.

Unknown: installed screen data, PLC model compatibility, unit condition, and current commercial availability are not established by the catalog.

Exact reference: NT11S-SF121B
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: Displays compact PLC status and operator messages and returns key input through the supported serial link.
System position: Sits at the operator panel between the operator and the connected PLC.
Upstream / inputs: Receives PLC status and data through Host Link or NT Link.
Downstream / outputs: Sends operator key input back to the PLC through the terminal link.
Limitations: Unknown: installed screen data, PLC model compatibility, unit condition, and current commercial availability are not established by the catalog.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The Omron catalog identifies NT11S-SF121B as the black NT11S 4-by-20 alphanumeric programmable terminal.
Confidence: high
- www.omron.com.au — retrieved 2026-09-12; high confidence
The catalog records 160 x 64 dot display capacity and Host Link or NT Link communication for the NT11S terminal.
Confidence: high
- www.omron.com.au — retrieved 2026-09-12; high confidence

Inferences

Inferred system position: Sits at the operator panel between the operator and the connected PLC.
Confidence: medium
Rationale: The documented product function and interfaces establish the adjacent system stages.
- www.omron.com.au — retrieved 2026-09-12; high confidence

Unknowns

Unknown: installed screen data, PLC model compatibility, unit condition, and current commercial availability are not established by the catalog.
Confidence: low
Missing evidence: installed screen data, PLC model compatibility, unit condition, and current commercial availability are not established by the catalog.

System position diagram

A flow from Receives PLC status and data through Host Link or NT Link. through NT11S-SF121B to Sends operator key input back to the PLC through the terminal link.. — System position inferred from the captured evidence: Sits at the operator panel between the operator and the connected PLC.

View Mermaid source

flowchart LR
  upstream["Receives PLC status and data through Host Link or NT Link."] -->|"documented input"| item["NT11S-SF121B"]
  item -->|"documented output"| downstream["Sends operator key input back to the PLC through the terminal link."]

View diagram labels

Nodes: Receives PLC status and data through Host Link or NT Link.; Omron NT11S-SF121B 4-by-20 alphanumeric terminal; Sends operator key input back to the PLC through the terminal link.
Edges: Documented upstream interface; Documented downstream interface

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