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MAIN
IEEE488
BUS
CONNECTIONS
APPENDIX
c
The slots
on the rear
of the
IBM P.C. are slightly
too narrow
to
accommodate
a standard
IEEE-488
connector
directly.
To make
connections
a standard
25 pin
D type
female
is
used
on the
backplate
(similar
to RS232 type
connector)
and a special
adapter
cable,
MetraByte
part
# C88-01,
is used between
the D connector
and
the
standard
IEEE-488
male/female.
For
details
of
this
adapter
cable
see Appendix
D.
A rear
view
of the D connector
pin
assignments
is shown below:-
GND
SHIELD
ATN
SRQ
IFC
NDAC
NRFD
DAV
EOI
DIO-4
DIO-3
DIO-2
DIO-1
A.
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
GND
GND
GND
GND
GND
GND
GND
REN
DIO-8
DIO-7
DIO-6
DIO-5
Note
that
although
the
above
connector
is of the
same type
as
specified
by IEC-625,
the pinout
is different.
An adapter
cable
is required
for
IEC-625
instruments.
Page 40
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