1770-6.6.1, c - pin assignments, Pin assignments – Rockwell Automation 1770-M12 Mass Storage Systems User Manual
Page 54

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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