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68-Conductor SCSI Quiet Cable™ Pinout for LVD/MSE SCSI

Cable Pair Location:   SCSI 68-Conductor pinout for LVD/MSE SCSI showing the accepted SCSI standard: REQ and ACK in the center, control lines in the middle layer and data lines in the outside layer of the cable

See also 50-Conductor SCSI Pinout for SE and HVD Interface
See also 68-Conductor SCSI Pinout for SE and HVD Interface

PIN# CABLE
PAIR
SE/LVD
1 30 SR/+DB12
2 31 SR/+DB13
3 32 SR/+DB14
4 33 SR/+DB15
5 34 SR/+DBP1
6 16 SR/+DB0
7 17 SR/+DB1
8 18 SR/+DB2
9 19 SR/+DB3
10 20 SR/+DB4
11 21 SR/+DB5
12 22 SR/+DB6
13 23 SR/+DB7
14 24 SR/+P_CRCA
15 25 GND/GND
16 15 DIFFSENSE
17 14 TPWR/TPWR
18 13 TPWR/TPWR
19 12 RSVD/RSVD
20 5 GND/GND
21 6 SR/+ATN
22 7 GND/GND
23 4 SR/+BSY
24 3 SR/+ACK
25 8 SR/+RST
26 9 SR/+MSG
27 10 SR/+SEL
28 2 SR/+C/D
29 1 SR/+REQ
30 11 SR/+I/0
31 26 SR/+DB8
32 27 SR/+DB9
33 28 SR/+DB10
34 29 SR/+DB11
PIN# CABLE
PAIR
SE/LVD
35 30 -DB12/-DB12
36 31 -DB13/-DB13
37 32 -DB14/-DB14
38 33 -DB15/-DB15
39 34 -DBP1/-DBP1
40 16 -DB0/-DB0
41 17 -DB1/-DB1
42 18 -DB2/-DB2
43 19 -DB3/-DB3
44 20 -DB4/-DB4
45 21 -DB5/-DB5
46 22 -DB6/-DB6
47 23 -DB7/-DB7
48 24 -DBP/-P_CRCA
49 25 GND/GND
50 15 GND/GND
51 14 TPWR/TPWR
52 13 TPWR/TPWR
53 12 RSVD/RSVD
54 5 GND/GND
55 6 -ATN/-ATN
56 7 GND/GND
57 4 -BSY/-BSY
58 3 -ACK/-ACK
59 8 -RST/-RST
60 9 -MSG/-MSG
61 10 -SEL/-SEL
62 2 -C/D/-C/D
63 1 -REQ/-REQ
64 11 -I/O/-I/O
65 26 -DB8/-DB8
66 27 -DB9/-DB9
67 28 -DB10/-DB10
68 29 -DB11/-DB11

For more detailed information on SCSI cabling including connector types, see:

  • SCSI Quiet Cable™ The secret of SCSI Quiet Cable is that they are built according to the SCSI specification, consisting of 25 or 34 twisted pairs of multi-stranded 28-gauge flexible copper wires.

For an overview of SCSI cabling, see:

And for information on how to verify SCSI cable performance, see:

  • Cable Cautions SCSI whitepaper detailing the need to build SCSI cabling to the correct SCSI specifications.

And for information on how to verify SCSI cable performance, see:

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