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

Function of the card:
Two-Way AND, Type B (in-phase load)

Part number: 371285

Used in: IBM 7090


+A: Positive AND. in-phase output is positive only when all inputs are positive. Out-of-phase output is negative for the above condition.
IBM SMS card type DBZV 371285 IBM SMS card type DBZV 371285

Image courtesy of Henk Stegeman

References: IBM Standard Modular System, Component Circuits, p67
This page created by Ken Shirriff on Sun Dec 16 16:11:05 2018.

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.