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File No. 8360-19
Form A22-6844-1
Systems Reference Library
IBM 2701 Data Adapter Unit
Original Equipment Manufacturers' Information
This publication describes the IBM 2701 Data Adapter Unit in-
terfaces. The processor interface description provides system
attachment information. The transmission adapter interface
descriptions provide device attachment information. The elec-
trical, mechanical, and cabling specifications of these inter-
faces are provided, together with general physical planning
requirements.
This pUblication is a major revision of form A22-6844-0 and
obsoletes it as well as the associated Technical Newsletter,
form N22-0190-0. The manual has been completely reorgan-
ized and includes a new section on the processor interface.
All other sections have been revised to reflect the latest en-
gineering data.
PREFACE
This publication contains information required to
attach an IBM 2701 Data Adapter Unit to non-IBM
equipment. It contains a general description of
machine functions, a reference list of related publi-
cations and engineering documents, and interface
information not readily available in other publications.
Users of this pUblication are cautioned that speci-
fications are subject to change without notice. The
data in this publication reflects engineering s pecifica-
tions as of December 1, 1965. Complete wiring dia-
grams at the latest level are included with each
machine shipment. Whenever this publication is af-
fected by major engineering changes, it will be up-
dated by a Technical Newsletter or a revision.
Part numbers specified in this pUblication are sub-
ject to change by IBM. The user is advised to verify
part numbers with the local IBM Branch Office before
ordering parts.
All descriptions and data in this manual are sub-
ject to modification as a result of engineering develop-
ment.
Unless otherwise stated, the grounding of various
external devices to the 2701 is made at the power
source common. However, when the power sources
differ (thus allowing the frames of different machines
to be at different potentials) and when the machines
are close enough to one another to present a hazard-
0us condition, other grounding methods must be
used. In no case should interface lines designated
as grounds be used to establish a common frame
grounding.
This manual has been prepared by the IBM Systems Development Division,
Product Publications, Dept. 528, CPO Box 120, Kingston, N. Y., 12401.
Address comments concerning the manual to this address.