IBM SCSI - External Connectors & Cables

SCSI external cable connector diagrams - Servers (IBM Support)
EPRM - SCSI ext. Cables / Terminators and Standards (source material)

System/Adapter SCSI Connectors
SCSI Adapter-to-Device Cables
SCSI Standards and Max. Cable Lengths


System/Adapter SCSI Connectors (photos and some text from Sandy, original HERE)

IBM's Micro Channel based SCSI adapters and planars use special High Density Centronics connectors, that are physically incompatible with the "industry standard" Centronics CN-50 (for SCSI-1) and Micro DB50 (SCSI-2) variants. The connectors used by IBM are physically smaller (with smaller pins and finer pin-pitch) and have either 60 (SCSI-1) or 68 (SCSI-2) pins. The two connector variants are known as HDCN60 and HDCN68 respectively.

Top: F/W SCSI 68-pin External Cable Connector

Bottom: Narrow SCSI-1 60-pin External Cable Connector

Top: Narrow SCSI-1 60-pin External Cable Connector

Bottom: Centronics (Amphenol) full-pitch 50-pin SCSI connector

Terminator for external 60-pin connector.

Used for adapters that don't support auto-termination. Instead of taking the machine apart to install an internal terminator pack, it's possible to use an external terminator like the one pictured. (there are 68-pin variants as well)

System / Adapter Connector
8556 8557 - Planar 60 pin SCSI
8580 8590 8595 - SPOCK
8640-Server 320 PCI/MCA
8641-Server 500 MC (IBM)
68 pin F/W SCSI - Corvette
8641-Server 500 RAID MC (IBM)
68 pin F/W SCSI - Cheetah
9556 9557 9576 9577
Planar 50 pin SCSI
9576i 9577i MC (IBM)
68 pin F/W SCSI - Corvette
9576i 9577i MC (Future)
50 pin HPDB - Patriot / MCS-700
9585 Mod. xXx, 1NG, V01
Planar 60 pin SCSI
9585 Mod. OKx, ONx, Exx
Planar F/W 68 pin SCSI
9590 MC (IBM)
60 pin SCSI - SPOCK
9595 Mod. Axx Sxx MC (IBM)
60 pin SCSI - SPOCK
SCSI-2 Fast MC/A Future Domain
50 pin HPDB - Patriot / MCS-700
IBM SCSI MC/A
60 pin SCSI - SPOCK
IBM SCSI-2 Fast/Wide MC/A
68 pin F/W SCSI - Corvette
IBM SCSI-2 FWSR/A
68 pin F/W SCSI - Cheetah


SCSI Adapter-to-Device Cables

Adapter Connector Device Connector Len.
m / ft.
FRU P/N OPT P/N

1.5 / 5 34F0017 32G4143
1.5 / 5 31F4221 31F4187
1.5 / 5 92F0321 32G3915
1.5 / 5 71G2590 32G3099
1.5 / 5 92F2559  
1.5 / 5 92F0326 /
52G9501
32G3913
1.0 / 3 06H3231 /
06H3228
PRADC1M /
06H3231
1.5 / 5 32G4089 PCSC01Y
1.5 / 5 32G0397 8191286

DASD Options FRU P/N OPT P/N MCA
SCSI-2 Fast/Wide Adapter/A 92F0160 6451280 X
SCSI-2 Fast/Wide 16-Bit Int. Cable
(68 to 68 Pin) 8585/8595
92F0327 32G3922 X
SCSI-2 Fast/Wide 16-Bit Int. Cable
(68 to 68 Pin) 8590
61G3511 32G3921 X
SCSI-2 Fast/Wide 8-Bit Int. Cable
(50 to 50 Pin) 8585/8595
61G3005 32G3098 X
SCSI-2 Fast/Wide 8-Bit Int. Cable
(50 to 50 Pin) 8590
61G3508 32G3097 X
SCSI-2 Fast/Wide Card to SCSI-2
Fast/Wide Opt.-cable (68 to 68 Pin)
92F0326 32G3913 X
SCSI-2 Fast/Wide Card to SCSI-2
Fast/Wide Opt.-cable (68 to 68 Pin Short)
92F0441 32G3914 X
SCSI-2 Fast/Wide Card to SCSI
Opt.-cable (68 to 50 Pin Long)
92F0321 32G3915 X
SCSI-2 Fast/Wide Card to SCSI
Opt.-cable (68 to 50 Pin Short)
92F0325 32G3917 X
SCSI Internal Converter
16-Bit to 8-Bit (68 to 50 Pin)
92F0324 32G3925 X
SCSI Card to Opt. Cable
(60 to 50 Pin Long)
34F0017 32G4143 X
SCSI-2 Card to Single Port SCSI
Option Cable (68 to 50 Pin Long)
71G2590 32G3099 X
SCSI-2 Fast/Wide 16-Bit
Active Terminator (68 Pin)
92F0432 32G3918 X
SCSI-2 Fast/Wide 8-Bit
Active Terminator (50 Pin)
92F0057 32G3919 X


SCSI Standards and Max. Cable Lengths

Mode Bandwith Frequency Max Data
Transfer
Max Cable
Length (SE)
SCSI-I 8-bit 5 MHz 5 MB/s 6 meters
SCSI-II 8-bit 5 MHz 5 MB/s 6 meters
Fast SCSI 8-bit 10 MHz 10 MB/s 3 meters
Wide SCSI 16-bit 5 MHz 10 MB/s 6 meters
Fast/Wide SCSI 16-bit 10 MHz 20 MB/s 3 meters

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