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Pro-face AST3301-B1-D24 HMI

Pro-face AST3301-B1-D24 HMI with a monochrome touch display and serial interfaces; check revision, wiring, and replacement fit.

System role and migration limits

Rebuilt from individual evidence

Pro-face identifies AST3301-B1-D24 as an HMI in the ST3000 Series. Its operator interface uses a 5.7-inch monochrome blue/white LCD with QVGA 320 by 240 resolution and an analog resistive-film touch screen.

The documented connections are one USB 1.1 Type-A interface, COM1 RS-232C, and COM2 RS-422/485. The installation guide makes RS-485 support revision-dependent for this model and warns that the serial interface is not isolated.

Pro-face lists the model as end of sales on 2013-09-30 and end of repair on 2019-12-27. Its replacement options include PFXST6400WADE and PFXST6300TADE, with documented differences that require a project-level comparison.

The Pro-face brochure specifies DC24V input and power consumption of 18W or less for AST3301-B1-D24.

Exact reference
AST3301-B1-D24
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 machine information and accepts operator touch input through its HMI screen.
System position
Acts at the operator-facing boundary between the operator and the host PLC or control system.
Upstream / inputs
Operator touch actions and host PLC communications are the documented upstream inputs to the HMI.
Downstream / outputs
COM1 and COM2 provide the downstream data path toward the host control system.
Limitations
Unknown: the installed revision, host PLC model, project or application data, exact replacement compatibility, current condition, stock, and repair route.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

  • Pro-face identifies AST3301-B1-D24 as an HMI in the ST3000 Series and assigns global code PFXST3301BAD.

    Confidence: high

  • Pro-face lists 2013-09-30 as the end-of-sales date and 2019-12-27 as the end-of-repair date for AST3301-B1-D24.

    Confidence: high

  • Pro-face lists PFXST6400WADE and PFXST6300TADE as replacement options and notes differences in display, resolution, blink support, and panel cutout.

    Confidence: high

  • The Pro-face AST-3301B brochure identifies AST3301-B1-D24 as a 5.7-inch monochrome blue/white LCD operator interface with QVGA 320 by 240 resolution and eight shades of blue and white.

    Confidence: high

  • The Pro-face brochure identifies an analog resistive-film touch screen for AST3301-B1-D24.

    Confidence: high

  • The Pro-face brochure identifies one USB 1.1 Type-A interface, COM1 RS-232C, and COM2 RS-422/485 for AST3301-B1-D24.

    Confidence: high

  • The Pro-face brochure specifies DC24V input and power consumption of 18W or less for AST3301-B1-D24.

    Confidence: high

  • The Pro-face installation guide specifies a D-Sub 9-pin RS-232C COM1 and a D-Sub 9-pin RS-422/RS-485 COM2, with RS-485 compliance for AST3301-B1-D24 when revision code B or later is present.

    Confidence: high

  • The Pro-face installation guide states that the serial interface is not isolated and gives a signal-ground connection caution when the host PLC is also not isolated.

    Confidence: high

Inferences

  • AST3301-B1-D24 presents machine information and operator inputs at the boundary to a host PLC or control system.

    Confidence: medium

    Rationale: Pro-face classifies the item as an HMI and operator interface, documents a touch display and serial ports, and the installation guide explicitly discusses connection to a host PLC.

  • Operator touch actions and host PLC communications are the documented upstream inputs to AST3301-B1-D24.

    Confidence: medium

    Rationale: The resistive touch screen accepts operator input and the serial interfaces connect the HMI to the host PLC path described in the installation guide.

  • COM1 and COM2 provide the downstream data path toward the host control system.

    Confidence: medium

    Rationale: The documented serial ports are the physical communications path between the HMI and host control equipment; the application protocol remains a project-level detail.

  • A migration decision requires checking the project's serial wiring, unit revision, and panel cutout against the selected replacement.

    Confidence: medium

    Rationale: The manufacturer lists replacement differences, makes RS-485 support revision-dependent, and warns about non-isolated serial wiring, so a direct replacement cannot be assumed from the model name alone.

Unknowns

  • Unknown: the installed revision, host PLC model, project or application data, and exact replacement compatibility for the installation.

    Confidence: low

    Missing evidence: No installed-unit label, host PLC record, project file, or panel measurement was captured in the individual lookup.

  • Unknown: current condition, stock, and any repair route after the listed end-of-repair date.

    Confidence: low

    Missing evidence: The manufacturer page provides historical lifecycle dates but does not establish the present condition, stock, or repair route of a particular unit.

System position diagram

Operator touch input reaches the AST3301-B1-D24 HMI, which displays machine information and connects to a host PLC through COM1 and COM2.

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

AST3301-B1-D24 is shown as an operator-facing HMI exchanging data with a host PLC through documented serial interfaces.

Enlarged system diagram

Operator touch input reaches the AST3301-B1-D24 HMI, which displays machine information and connects to a host PLC through COM1 and COM2.

AST3301-B1-D24 is shown as an operator-facing HMI exchanging data with a host PLC through documented serial interfaces.

View Mermaid source
flowchart TB
  operator["Operator touch input"] --> hmi["AST3301-B1-D24 HMI"]
  plc["Host PLC"] --> hmi
  hmi --> display["Monochrome QVGA display"]
  hmi --> serial["COM1 RS-232C / COM2 RS-422/485"]
View diagram labels
Nodes
Operator touch input; AST3301-B1-D24 HMI; Monochrome QVGA display; Host PLC; COM1 and COM2 serial path
Edges
Touch input; Displayed machine information; Host serial data path

Next action

Use AST3301-B1-D24 as an HMI identification and migration lead; compare the project's host wiring, unit revision, and panel cutout with the selected replacement before any intervention.

Unknown: the installed revision, host PLC model, project or application data, exact replacement compatibility, current condition, stock, and repair route are not captured; obtain those records before requesting a replacement.

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