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Omron NT631C-ST153B-EV3 programmable terminal

Omron NT631C-ST153B-EV3 programmable terminal with a color TFT display, pressure-sensitive touch panel, and documented serial interfaces.

System role and interfaces

Rebuilt from individual evidence

Omron lists NT631C-ST153B-EV3 in the NT631C programmable terminal series. It uses a color TFT display and a pressure-sensitive touch panel for operator interaction.

The documented supply is 24 VDC. Serial port A uses EIA RS-232C; serial port B supports EIA RS-232C or selectable RS-422A/485, with a Centronics parallel interface and a dedicated expansion interface.

Omron's discontinuation notice records the model as discontinued and names NA5-12W101B-V1 as the recommended replacement. The notice also records order, shipping, and maintenance milestones that must be checked before a recovery decision.

Exact reference
NT631C-ST153B-EV3
Category
HMI / Display
Evidence checked
2026-09-11

System role

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

Function
Displays control-system information on a color TFT screen and accepts operator input through a pressure-sensitive touch panel.
System position
Acts at the operator-facing boundary between the operator and connected control equipment.
Upstream / inputs
Operator touch actions and data arriving through the serial interfaces are the documented upstream inputs.
Downstream / outputs
The serial interfaces provide the downstream connection toward configured control equipment.
Limitations
Unknown: the installed host, project screen data, firmware revision, protocol configuration, current stock, and repair route.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

  • Omron lists NT631C-ST153(B)-EV3 under the NT631C programmable terminal series.

    Confidence: high

  • Omron specifies a 24 VDC rated supply and an allowable range of 20.4 to 26.4 VDC for NT631C-ST153(B)-EV3.

    Confidence: high

  • Omron specifies a color TFT LCD with 640 by 480 dots, a 211 by 158 mm effective area, and eight display colors.

    Confidence: high

  • Omron specifies a pressure-sensitive touch panel with 768 switches arranged as 32 by 24.

    Confidence: high

  • Omron specifies serial port A as EIA RS-232C, serial port B as EIA RS-232C or selectable RS-422A/485, a Centronics parallel interface, and a dedicated expansion interface.

    Confidence: high

  • Omron's discontinuation notice lists NT631C-ST153B-EV3 as discontinued and names NA5-12W101B-V1 as its recommended replacement.

    Confidence: high

  • Omron's notice gives the end of August 2022 as the final order-entry date, the end of December 2022 as the last shipping date, and the end of September 2029 as the scheduled maintenance close.

    Confidence: high

Inferences

  • NT631C-ST153B-EV3 acts at the operator-facing boundary of a control system.

    Confidence: medium

    Rationale: The manufacturer classifies the item as a programmable terminal and documents display, touch, and control-system communication interfaces, which together place it at the operator-facing boundary.

  • Operator touch actions and data from connected serial equipment are the documented upstream inputs to NT631C-ST153B-EV3.

    Confidence: medium

    Rationale: The touch panel supplies operator input and the documented serial ports connect the terminal to external control equipment; the captured source does not identify the installed host or application protocol.

  • The serial interfaces provide the downstream connection toward configured control equipment.

    Confidence: medium

    Rationale: The manufacturer documents serial communication interfaces on the programmable terminal; their actual host, data direction, and protocol are installation-specific.

Unknowns

  • Unknown: the installed host, project screen data, firmware revision, and protocol configuration.

    Confidence: low

    Missing evidence: No installed-unit record, project file, firmware label, or host protocol configuration was captured in the individual lookup.

  • Unknown: current stock and the current repair route.

    Confidence: low

    Missing evidence: The lifecycle notice records historical milestones but does not establish present stock or a current repair route.

System position diagram

Operator touch input reaches the NT631C-ST153B-EV3 terminal, which displays information and connects to control equipment through documented serial interfaces.

Reading limit: system position only, not a wiring or safety drawing.

NT631C-ST153B-EV3 is shown as an operator-facing programmable terminal with documented display, touch, and serial interfaces.

Enlarged system diagram

Operator touch input reaches the NT631C-ST153B-EV3 terminal, which displays information and connects to control equipment through documented serial interfaces.

NT631C-ST153B-EV3 is shown as an operator-facing programmable terminal with documented display, touch, and serial interfaces.

View Mermaid source
flowchart TB
  operator["Operator touch input"] --> terminal["NT631C-ST153B-EV3"]
  host["Serial control equipment"] --> terminal
  terminal --> display["Color TFT display"]
  terminal --> serial["RS-232C / RS-422A/485 interfaces"]
View diagram labels
Nodes
Operator touch input; NT631C-ST153B-EV3 programmable terminal; Color TFT display; Serial control equipment
Edges
Touch input; Displayed control information; Serial data path

Next action

Use this record to identify an operator terminal and plan a documented migration; compare the existing serial wiring, project data, and panel fit with the recommended replacement before any change.

Unknown: the installed host, project screen data, firmware revision, protocol configuration, current stock, and repair route are not captured; obtain those records before requesting supply or replacement.

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