50 PIN Stiftleiste am Kontroller und Harddisk
	50 PIN Buchsenleiste am Kabel

Pin	Name	Beschreibung	Pin	Name	Beschreibung
1	Open	Nicht angeschlossen	26	TERMPWR	Termination Power
2	GND	Ground	27	GND	Ground
3	+DB0	Data Bus 0 +	28	GND	Ground
4	-DB0	Data Bus 0 -	29	+ATN	Attention
5	+DB1	Data Bus 1 +	30	-ATN	Attention
6	-DB1	Data Bus 1 -	31	GND	Ground
7	+DB2	Data Bus 2 +	32	GND	Ground
8	-DB2	Data Bus 2 -	33	+BSY	Busy
9	+DB3	Data Bus 3 +	34	-BSY	Busy
10	-DB3	Data Bus 3 -	35	+ACK	Acknowledge
11	+DB4	Data Bus 4 +	36	-ACK	Acknowledge
12	-DB4	Data Bus 4 -	36	+RST	Reset
13	+DB5	Data Bus 5 +	38	-RST	Reset
14	-DB5	Data Bus 5 -	39	+MSG	Message
15	+DB6	Data Bus 6 +	40	-MSG	Message
16	-DB6	Data Bus 6 -	41	+SEL	Select
17	+DB7	Data Bus 7 +	42	-SEL	Select
18	-DB7	Data Bus 7 -	43	+C/D	Control/Data
19	+DBP	Data Parity +	44	-C/D	Control/Data
20	-DBP	Data Parity -	45	+REQ	Request
21	DIFFSENS		46	-REQ	Request
22	GND	Ground	47	+I/O	Input/Output
23	GND	Ground	48	-I/O	Input/Output
24	GND	Ground	49	GND	Ground
25	TERMPWR	Termination Power	50	GND	Ground

SCSI=Small Computer System Interface. Entwickelt 1986 von Shugart.