IBM 2821 Control Unit

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The IBM 2821 Control Unit was used to attach card readers, card punches and line printers to the IBM System/360 and IBM System/370 families of computers. The devices attached were as follows:

  • The IBM 2540 card reader and card punch;
  • The IBM 1403 models 2, 3, 7 and N1 line printer; and
  • The IBM 1404 model 2 line printer and card reader.

Six models of the IBM 2821 Control Unit were available, as follows:

External links[edit]

IBM (November 1969), IBM 2821 Component Description, Eighth Edition, A24-3312-7. 

IBM (October 1982), IBM 2821 Component Description, Tenth Edition, GA24-3312-9.