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SCSI External D-Sub (PC/Amiga/Apple Macintosh) pinout

hard drive connector

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25 pin D-SUB female connector layout

25 pin D-SUB female connector
at the controller



Pin Name Dir Description
1/REQ-->Request
2/MSG-->Message
3I/O-->Input/Output
4/RST<->Reset
5/ACK<--Acknowledge
6BSY<->Busy
7GND---Ground
8DB0<->Data Bus 0
9GND---Ground
10DB3<->Data Bus 3
11DB5<->Data Bus 5
12DB6<->Data Bus 6
13DB7<->Data Bus 7
14GND---Ground
15C/D-->Control/Data
16GND---Ground
17/ATN<--Attention
18GND---Ground
19/SEL<->Select
20PARITY<->Data Parity
21DB1<->Data Bus 1
22DB2<->Data Bus 2
23DB4<->Data Bus 4
24GND---Ground
25TMPWR<->Termination Power

Note: Direction is Device relative Bus (other Devices). Total length of all SCSI cables should not exceed 20 feet (6 meters).


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25 pin D-SUB male connector diagram

25 pin D-SUB male connector
at the cable

Pinouts.ru > Hard drives connectors pinouts listing >  Pinout of SCSI External D-Sub (PC/Amiga/Apple Macintosh) and layout of 25 pin D-SUB female connector and 25 pin D-SUB male connector
Document status: correct
Source(s) of this and additional information: Hardware Book 1 reports
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