Function of the card:
CTDL-Two Way “And” NPN
Two-Way+AND (all loads)
Ctdl two way and npn all loads
Part number: 371252
Field replacement part number: 370976
Customer Eng reference number: 729827
Cap code: WW (details)
Image courtesy of Randall Neff
Image courtesy of Henk Stegeman
1401 Pocket Reference Manual
IBM Standard Modular System, Component Circuits, p43.
1_2 SMS Cards, p30,31,32,89.
The information on these pages comes from a variety of sources, especially old IBM documents on bitsavers.org, 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.