SCSI-II External Hi D-Sub (Single-ended) connector

#Computer#Harddisk interfaces
50 pin HI-DENSITY D-SUB FEMALE connector pin-out & layout

50 pin HI-DENSITY D-SUB FEMALE connector  at the controller & devices

PinNameDirDescription
1-25GND---Ground
26DB0<->Data Bus 0
27DB1<->Data Bus 1
28DB2<->Data Bus 2
29DB3<->Data Bus 3
30DB4<->Data Bus 4
31DB5<->Data Bus 5
32DB6<->Data Bus 6
33DB7<->Data Bus 7
34PARITY<->Data Parity (odd Parity)
35GND---Ground
36GND---Ground
37GND---Ground
38TMPWR<->Termination Power
39GND---Ground
40GND---Ground
41/ATN<--Attention
42n/c-Not connected
43/BSY<->Busy
44/ACK<--Acknowledge
45/RST<->Reset
46/MSG-->Message
47/SEL<->Select
48/C/D-->Control/Data
49/REQ-->Request
50/I/O-->Input/Output
Note: Direction is Device relative Bus (other Devices)

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

SCSI-III External Hi D-Sub (Differential) connector