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AO Engineering Toolbox / Tool 01

Free Wire Label Generator & I/O Builder

Turn an electrical I/O list into tidy, printable wire markers, terminal labels or PLC I/O labels. Import, edit, preview and print — without creating an account.

Free to useExcel .xlsx / CSV / pasted tablesRuns on your deviceA4 print / Save as PDF
STEP 01 / INPUT

Bring in your I/O list

Supports .xlsx (first worksheet), CSV or pasted tab-separated Excel cells. No files are sent to AO.

Drag a file here

CSV, TSV or XLSX • maximum 5 MB

No file selected.
STEP 02 / MAP

Match your columns

Auto-detected where possible. Change any dropdown to match your actual spreadsheet.

You can also correct any value in the editable list below. Empty rows are skipped.

STEP 03 / REVIEW

Check your data

This is only a label generator. Compare all identifiers against approved electrical drawings before fitting labels.

#PLC address / tagDescriptionTerminalWire No.Remove
0 rows
STEP 04 / OUTPUT

Choose your label format

A4 sheets with real millimetre dimensions. Set your printer scale to 100% / Actual size.

Illustrative preview only — print uses actual dimensions in mm.

Print directly, or select Save as PDF from your browser's print dialog. The generated file stays on your device.

0Labels ready
0A4 pages
50 × 20Millimetres / label

Plain A4 print layout, not a proprietary label sheet or printer driver. Print a test sheet and check against a ruler before applying. Paper fit, margins and printer calibration vary.

Privacy first: Spreadsheet processing and PDF printing happen in your browser. No spreadsheet upload, account or backend needed. Check AO’s privacy notice for website analytics. Don't use it as a substitute for approved drawings, cable schedules or safety checks.
HELP / ENGINEERING RESOURCES

How to make wire labels from an Excel I/O list

For control-panel builders, PLC engineers and maintenance teams who need a practical printed schedule rather than another spreadsheet to format.

  1. Export an I/O list as .xlsx or .csv, or paste cells directly from Excel. The Excel importer reads the first worksheet.
  2. Map columns for PLC address or tag, description, optional terminal and optional wire number.
  3. Correct identifiers in the editable table. Select Wire marker, Terminal or PLC I/O in the label settings.
  4. Preview the labels, set their dimensions, then print on A4 or choose Save as PDF. Check printer scaling is 100% / actual size.

Frequently asked questions

Can I generate labels from Excel?

Yes. Use a .xlsx file, CSV, or copy and paste a table of cells. Older .xls workbooks are not supported by this first version.

Does the spreadsheet leave my computer?

No. Import, mapping and label generation run within your browser. You do not need an AO account to use this tool.

Will these labels fit any proprietary label printer?

Not necessarily. This tool generates generic A4 layouts and downloadable CSV data, not native Brother, Brady, Phoenix Contact or other printer-specific file formats. Test the dimensions on your own media first.

Can I use the labels as approved wiring documentation?

No. This is a formatting utility. Confirm every address, wire and terminal against the approved machine schematics and your own panel documentation before use.

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