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SCSI-III External Hi D-Sub (Single-ended)

SCA=Single Connector Attachment

Drive connector: AMP Champ 557613-1 or AMP Champ 557114-5
Cable connector: AMP Champ 2-557103-1 or AMP Champ 2-557101-1


Pin Name Dir Description
1 12V --- +12 VDC
2 12V --- +12 VDC
3 12V --- +12 VDC
4 12V --- +12 VDC
5 3.3V --- +3.3 VDC
6 3.3V --- +3.3 VDC
7 -DB(11) <-> Data Bus 11
8 -DB(10) <-> Data Bus 10
9 -DB(9) <-> Data Bus 9
10 -DB(8) <-> Data Bus 8
11 -I/O --> Input/Output
12 -REQ --> Request
13 -C/D --> Control/Data
14 -SEL <-> Select
15 -MSG --> Message
16 -RST <-> Reset
17 -ACK <-- Acknowledge
18 -BSY <-> Busy
19 -ATN <-- Attention
20 -P_CRCA ?
21 -DB(7) <-> Data Bus 7
22 -DB(6) <-> Data Bus 6
23 -DB(5) <-> Data Bus 5
24 -DB(4) <-> Data Bus 4
25 -DB(3) <-> Data Bus 3
26 -DB(2) <-> Data Bus 2
27 -DB(1) <-> Data Bus 1
28 -DB(0) <-> Data Bus 0
29 -DB(P1) ?
30 -DB(15) <-> Data Bus 15
31 -DB(14) <-> Data Bus 14
32 -DB(13) <-> Data Bus 13
33 -DB(12) <-> Data Bus 12
34 5V --- Ground (Signal)
35 5V --- Ground (Signal)
36 5V CHARGE --- Ground (Signal)
37 SPINDLE SYNC ? Spindle Sync
38 RMT_START ? Remote Start
39 SCSI ID (0) --- SCSI ID Bit 0
40 SCSI ID (2) --- SCSI ID Bit 2
41 12V GROUND --- +12 VDC Ground
42 12V GROUND --- +12 VDC Ground
43 12V GROUND --- +12 VDC Ground
44 MATED 1 ?
45 3.3V CHARGE --- +3.3 VDC Charge
46 GROUND --- Ground
47 SIGNAL RETURN --- Ground (Signal)
48 SIGNAL RETURN --- Ground (Signal)
49 SIGNAL RETURN --- Ground (Signal)
50 SIGNAL RETURN --- Ground (Signal)
51 SIGNAL RETURN --- Ground (Signal)
52 SIGNAL RETURN --- Ground (Signal)
53 SIGNAL RETURN --- Ground (Signal)
54 SIGNAL RETURN --- Ground (Signal)
55 SIGNAL RETURN --- Ground (Signal)
56 SIGNAL RETURN --- Ground (Signal)
57 SIGNAL RETURN --- Ground (Signal)
58 SIGNAL RETURN --- Ground (Signal)
59 SIGNAL RETURN --- Ground (Signal)
60 SIGNAL RETURN --- Ground (Signal)
61 SIGNAL RETURN --- Ground (Signal)
62 SIGNAL RETURN --- Ground (Signal)
63 SIGNAL RETURN --- Ground (Signal)
64 SIGNAL RETURN --- Ground (Signal)
65 SIGNAL RETURN --- Ground (Signal)
66 SIGNAL RETURN --- Ground (Signal)
67 SIGNAL RETURN --- Ground (Signal)
68 SIGNAL RETURN --- Ground (Signal)
69 SIGNAL RETURN --- Ground (Signal)
70 SIGNAL RETURN --- Ground (Signal)
71 SIGNAL RETURN --- Ground (Signal)
72 SIGNAL RETURN --- Ground (Signal)
73 SIGNAL RETURN --- Ground (Signal)
74 MATED 2 ?
75 5V GROUND --- +5 VDC Ground
76 5V GROUND --- +5 VDC Ground
77 ACTIVE LED OUT ?
78 DLYD_START ?
79 SCSI ID (1) --- SCSI ID Bit 1
80 SCSI ID (3) --- SCSI ID Bit 3

 

5: RESERVED/NC 6: RESERVED/NC 20: -DB(P0) 36: 5 VOLT 44: 12 V GROUND 45: RESERVED/NC 46: RESERVED/NC 74: 5 V GROUND

Note: Direction is Device relative Bus (other Devices).

 
SCSI Internal (Single-ended)

SCSI=Small Computer System Interface.
Based on an original design by Shugart Associates. SCSI was ratified in 1986.

50 PIN IDC MALE (at the controller & harddisk)
50 PIN IDC FEMALE (at the cable.)

50 PIN IDC MALE at the controller & harddisk.
50 PIN IDC FEMALE at the cable.

Pin Name Dir Description
2 DB0 <-> Data Bus 0
4 DB1 <-> Data Bus 1
6 DB2 <-> Data Bus 2
8 DB3 <-> Data Bus 3
10 DB4 <-> Data Bus 4
12 DB5 <-> Data Bus 5
14 DB6 <-> Data Bus 6
16 DB7 <-> Data Bus 7
18 PARITY <-> Data Parity (odd Parity)
20 GND --- Ground
22 GND --- Ground
24 GND --- Ground
26 TMPWR <-> Termination Power
28 GND --- Ground
30 GND --- Ground
32 /ATN <-- Attention
34 GND --- Ground
36 /BSY <-> Busy
38 /ACK <-- Acknowledge
40 /RST <-> Reset
42 /MSG --> Message
44 /SEL <-> Select
46 http://www.bdn.odessa.ua/HWB/td> --> Control/Data
48 /REQ --> Request
50 http://www.bdn.odessa.ua/HWB/td> --> Input/Output

Note: Direction is Device relative Bus (other Devices).

All odd-numbered pins, except pin 25, are connected to ground. Pin 25 is left open.

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

50 PIN HI-DENSITY D-SUB FEMALE (at the controller & devices).
50 PIN HI-DENSITY D-SUB MALE (To the cable).

50 PIN HI-DENSITY D-SUB FEMALE at the controller & devices.
50 PIN HI-DENSITY D-SUB MALE at the cable.


Pin Name Dir Description
1-25 GND --- Ground
26 DB0 <-> Data Bus 0
27 DB1 <-> Data Bus 1
28 DB2 <-> Data Bus 2
29 DB3 <-> Data Bus 3
30 DB4 <-> Data Bus 4
31 DB5 <-> Data Bus 5
32 DB6 <-> Data Bus 6
33 DB7 <-> Data Bus 7
34 PARITY <-> Data Parity (odd Parity)
35 GND --- Ground
36 GND --- Ground
37 GND --- Ground
38 TMPWR <-> Termination Power
39 GND --- Ground
40 GND --- Ground
41 /ATN <-- Attention
42 n/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 External Centronics 50 (Single-ended)

50 PIN CENTRONICS FEMALE (at the controller & devices)
50 PIN CENTRONICS MALE (at the cable)

50 PIN CENTRONICS FEMALE at the controller & devices.
50 PIN CENTRONICS MALE at the cable.


Pin Name Dir Description
1-25 GND --- Ground
26 DB0 <-> Data Bus 0
27 DB1 <-> Data Bus 1
28 DB2 <-> Data Bus 2
29 DB3 <-> Data Bus 3
30 DB4 <-> Data Bus 4
31 DB5 <-> Data Bus 5
32 DB6 <-> Data Bus 6
33 DB7 <-> Data Bus 7
34 PARITY <-> Data Parity (odd Parity)
35 GND --- Ground
36 GND --- Ground
37 GND --- Ground
38 TMPWR <-> Termination Power
39 GND --- Ground
40 GND --- Ground
41 /ATN <-- Attention
42 n/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).

 
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