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1770-6.6.1, c - pin assignments, Pin assignments – Rockwell Automation 1770-M12 Mass Storage Systems User Manual

Page 54

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Appendix

C

CĆ1

Pin Assignments

In this appendix we list the pin assignments for:

Small Computer System Interface (SCSI)

RS422

interface

Table 1.E

SCSI Pin Assignments

Pin Number

Signal

Abbreviation

2

Data Bit 0

DB (0)

4

Data Bit 1

DB (1)

6

Data Bit 2

DB (2)

8

Data Bit 3

DB (3)

10

Data Bit 4

DB (4)

12

Data Bit 5

DB (5)

14

Data Bit 6

DB (6)

16

Data Bit 7

DB (7)

18

Data Bit Parity

DB (P)

20

Ground

Ground

22

Ground

Ground

24

Ground

Ground

26

Terminator Power(optional +5V)

TERMPWR

28

Ground

Ground

30

Ground

Ground

32

Attention

ATN

34

Ground

Ground

36

Busy

BSY

Objectives

Small Computer System

Interface (SCSI)

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