Pinouts of Connectors

SCSI-II External Hi D-Sub (Differential) connector pinout

layout
schematic diagram
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50 pin HI-DENSITY D-SUB FEMALE connector pin-out & layout
50 pin HI-DENSITY D-SUB FEMALE connector  at the controller & devices
Pin Name Dir Description
01 GND --- Ground
02 +DB0 <-> +Data Bus 0
03 +DB1 <-> +Data Bus 1
04 +DB2 <-> +Data Bus 2
05 +DB3 <-> +Data Bus 3
06 +DB4 <-> +Data Bus 4
07 +DB5 <-> +Data Bus 5
08 +DB6 <-> +Data Bus 6
09 +DB7 <-> +Data Bus 7
10 +DBP <-> +Data Bus Parity (odd Parity)
11 DIFFSENS ? ???
12 res - Reserved
13 TERMPWR <-> Termination Power
14 res - Reserved
15 +ATN <-- +Attention
16 GND --- Ground
17 +BSY <-> +Bus is busy
18 +ACK <-- +Acknowledge
19 +RST <-> +Reset
20 +MSG --> +Message
21 +SEL <-> +Select
22 +C/D --> +Control or Data
23 +REQ --> +Request
24 +I/O --> +In/Out
25 GND --- Ground
26 GND --- Ground
27 -DB0 <-> -Data Bus 0
28 -DB1 <-> -Data Bus 1
29 -DB2 <-> -Data Bus 2
30 -DB3 <-> -Data Bus 3
31 -DB4 <-> -Data Bus 4
32 -DB5 <-> -Data Bus 5
33 -DB6 <-> -Data Bus 6
34 -DB7 <-> -Data Bus Parity7
35 -DBP <-> -Data Bus Parity (odd Parity)
36 GND --- Ground
37 res - Reserved
38 TERMPWR <-> Termination Power
39 res - Reserved
40 -ATN <-- -Attention
41 GND --- Ground
42 -BSY <-> -Bus is busy
43 -ACK <-- -Acknowledge
44 -RST <-> -Reset
45 -MSG --> -Message
46 -SEL <-> -Select
47 -C/D --> -Control or Data
48 -REQ --> -Request
49 -I/O --> -In/Out
50 GND --- Ground

Note: Direction is Device relative Bus (other Devices)

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50 pin HI-DENSITY D-SUB MALE connector pin-outs & layouts
50 pin HI-DENSITY D-SUB MALE connector  at the cable
Pinouts.ru > Pinouts of different harddrives connectors >  Pinout of SCSI-II External Hi D-Sub (Differential) connector and layout of 50 pin HI-DENSITY D-SUB FEMALE connector and 50 pin HI-DENSITY D-SUB MALE connector

Source(s): Hardware Book, Karsten Wenke
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