This page describes the IBM SMS card "ADF", and is part of the SMS card database.

Function of the card:
Dap solenoid driver

Listed in 1401 SMS card usage

Part number: 372375

Customer Eng reference number: 734383

PCB number: 399721

Used in: IBM 1401, IBM 2821 Control Unit


IBM SMS card type ADF 372375 IBM SMS card type ADF 372375

References: IBM 2821 CCD, p18
This page created by Ken Shirriff on Wed Sep 15 18:15:11 2021.

The information on these pages comes from a variety of sources, especially old IBM documents on, as well as information from the IBM 1401 restoration team, especially Tim Coslet's SMS data and Jim Hunt's data. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.