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Chapter 4
IEEE-488 GPIB Interface
This chapter discusses setup of the IEEE-488 interface feature and describes
the IEEE commands that apply to the Bird 4421. Operators should under-
stand IEEE standard 488-1978 and have basic computer programming skills
before attempting to write any programs.
Description
The Bird 4421 IEEE-488 (GPIB) interfac
e has an eight-posi
tion DIP switch
that sets operational conditions and in
terface addresses.
The bottom line of
the display indicates th
e current bus status.
Cable Connector
The interface uses a standard IEEE-488
cable connector. Pin assignments are
listed in Figure 10.
CAUTION
During remote operation, pe
riodically monitor the bus
service request line. Failure
to detect a service request
could result in equipment damage.
Figure 10
IEEE-488 Pin
Assignments
Pin Designation Type
1 D101 Data
2 D102 Data
3 D103 Data
4 D104 Data
5 EOI Management
6 DAV Handshake
7 NRFD Handshake
8 NDAC Handshake
9 IFC Management
10 SRQ Management
11 ATN Management
12 SHIELD Ground
13 D105 Data
14 D106 Data
15 D107 Data
16 D108 Data
17 REN Management
18 GROUND Ground
19 GROUND Ground
20 GROUND Ground
21 GROUND Ground
22 GROUND Ground
23 GROUND Ground
24 GROUND, LOGIC Ground
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