- an overview of the connector pin allocations used for the GPIB, General
Purpose Interface Bus.
The GPIB interface is well established in the electronics
industry as a means of providing control of remote test and measurement
instruments. Although the GPIB interface has been in widespread use since the
early 1970s, the use of the GPIB interface continues in view of its convenience
and availability.
The connector that is used as the standard for GPIB is a
24-way Amphenol 57 series type. This is very similar in format to those used for
old parallel printer ports on PCs although the type used for the GPIB has the
advantage it has been modified. The GPIB interface connector has been modified
so that it is effectively a back to back plug and socket. In this way GPIB
connectors can be piggy-backed. This helps the physical setting up of the bus
and prevents complications with special connection boxes or star points.
The connections for the GPIB connector are given in the table
below:
|
Pin No |
Line Name |
Abbreviation |
|
1 |
Data Input / Output 1 |
DIO1 |
|
2 |
Data Input / Output 2 |
DIO2 |
|
3 |
Data Input / Output 3 |
DIO3 |
|
4 |
Data Input / Output 4 |
DIO4 |
|
5 |
End or Identify |
EOI |
|
6 |
Data Valid |
DAV |
|
7 |
Not Ready For Data |
NRFD |
|
8 |
Not Data Accepted |
NDAC |
|
9 |
Interface Clear |
IFC |
|
10 |
Service Request |
SRQ |
|
11 |
Attention |
ATN |
|
12 |
Shield (Connected to Earth) |
|
|
13 |
Data Input / Output 5 |
DIO5 |
|
14 |
Data Input / Output 6 |
DIO6 |
|
15 |
Data Input / Output 7 |
DIO7 |
|
16 |
Data Input / Output 8 |
DIO8 |
|
17 |
Remote Enable |
REN |
|
18 |
Twisted pair with pin 6 |
|
|
19 |
Twisted pair with pin 7 |
|
|
20 |
Twisted pair with pin 8 |
|
|
21 |
Twisted pair with pin 9 |
|
|
22 |
Twisted pair with pin 10 |
|
|
23 |
Twisted pair with pin 11 |
|
|
24 |
Signal Ground |
|
Summary
Despite the fact that it has been used for many years, GPIB still being used for
a wide variety of applications including the control of test instrumentation,.
Accordingly it may be necessary to access the GPIB pin connections.
