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

Function of the card:
N to N Line Terminator

Part number: 371141

Used in: 7030, IBM 7090

Cap code: None (details)

Symbol: DT

DT: Driver. Terminator. A single-transistor class-A grounded-base amplifier used to terminate a transmission line.
IBM SMS card type DL 371141 IBM SMS card type DL 371141

Image courtesy of Computer History Museum

References: IBM Standard Modular System, Component Circuits, p92

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.