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Single-ended 8-bit SCSI Pinouts

SIGNAL DD-50P HD-50 DD-50SA HD-68
SIGNAL DD-50P HD-50 DD-50SA HD-68
-DB(0) 2 26 34 40 GND 1 1 1 6
-DB(1) 4 27 2 41 GND 3 2 18 7
-DB(2) 6 28 19 42 GND 5 3 35 8
-DB(3) 8 29 36 43 GND 7 4 3 9
-DB(4) 10 30 4 44 GND 9 5 20 10
-DB(5) 12 31 21 45 GND 11 6 37 11
-DB(6) 14 32 38 46 GND 13 7 5 12
-DB(7) 16 33 6 47 GND 15 8 22 13
-DB(P) 18 34 23 48 GND 17 9 39 14
GND 20 35 40 49 GND 19 10 7 15
GND 22 36 8 50 GND 21 11 24 16
GND 24 37 Res 25 51 Opn GND 23 12 Res 41 17 Opn
TPWR 26 38 42 52 GND 25 13 Opn 9 18 Opn
GND 28 39 Res 10 53 GND 27 14 Res 26 19
GND 30 40 27 54 GND 29 15 43 20
-ATN 32 41 44 55 GND 31 16 11 21
GND 34 42 12 56 GND 33 17 28 22
BSY 36 43 29 57 GND 35 18 45 23
-ACK 38 44 46 58 GND 37 19 13 24
-RST 40 45 14 59 GND 39 20 30 25
-MSG 42 46 31 60 GND 41 21 47 26
-SEL 44 47 48 61 GND 43 22 15 27
-C/D 46 48 16 62 GND 45 23 32 28
-REQ 48 49 33 63 GND 47 24 49 29
-I/O 50 50 50 64 GND 49 25 17 30

Connector Types


Notes

  1. On HD50 cables, Pins 12, 14, 37, and 39 are reserved and Pin 13 is open.
  2. On HD50 to HD68 cables, Pins 1, 2, 3, 4, 5, 17, 18, 31, 32, 33, 34, 35, 36, 37, 38, 39, 51, 65, 66, 67, and 68 are open.

Last updated: December 2, 1996
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