Advantech PCLS-848-P, Руководство пользователя

Страница: 90 / 106

8 4 PCLS-848-P User's Manual
3) CONTROLLER. A device capable of managing communications over the IEEE-
488 bus such as addressing and sending commands. A PC with the IEEE-488
interface is typically a controller.
An IEEE-488 bus system allows only one device at a time to active talker, but it
allows multiple listeners receiving the same data at the same time. Only one controller
can be active at a time.
9.2. Bus Structure
An IEEE-488 bus has 24 lines including 7 ground return lines and one shield line. The
16 lines with signals are 8 data lines, 3 hand shake lines and 5 management lines.
9.2.1. IEEE 488 Connector Pin Assignment
The IEEE-488 standard uses 24 pin ribbon connector as the standard and the signal
assignment is:
DATA Lines Pin No. MANAGEMENT Lines Pin No.
---------------------- -----------------------------
DIOI 1 IFC 9
DI02 2 REN 17
DI03 3 ATN 11
DI04 4 SRQ 10
DI05 13 EOI 5
DI06 14
DI07 15 HANDsuAKE Lines Pin No.
DI08 16 ------------------------------
DAV 6
NRFD 7
NDAC 8
9.2.2. IEC-25 Connector Pin Assignment
The IEC-625 standard uses 25 pin D type connector as the standard and the signal
assignment is: