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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0206 </schemaVersion> |
| <documentType> 3 </documentType> |
| <periodOfReport> 2022-08-08 </periodOfReport> |
| <noSecuritiesOwned> 1 </noSecuritiesOwned> |
| <issuer> |
| | <issuerCik> 0000854775 </issuerCik> |
| | <issuerName> DIGI INTERNATIONAL INC </issuerName> |
| | <issuerTradingSymbol> DGII </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001943626 </rptOwnerCik> |
| | | <rptOwnerName> Chavali Radha </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> 9350 EXCELSIOR BLVD, SUITE 700 </rptOwnerStreet1> |
| | | <rptOwnerStreet2></rptOwnerStreet2> |
| | | <rptOwnerCity> HOPKINS </rptOwnerCity> |
| | | <rptOwnerState> MN </rptOwnerState> |
| | | <rptOwnerZipCode> 55343 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> false </isDirector> |
| | | <isOfficer> true </isOfficer> |
| | | <isTenPercentOwner> false </isTenPercentOwner> |
| | | <isOther> false </isOther> |
| | | <officerTitle> VP, Technology Services </officerTitle> |
| | | <otherText></otherText> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <nonDerivativeTable></nonDerivativeTable> |
| <derivativeTable></derivativeTable> |
| <footnotes></footnotes> |
| <ownerSignature> |
| | <signatureName> /s/ Joshua L. Colburn, Attorne-yin- Fact </signatureName> |
| | <signatureDate> 2022-08-22 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |