IBM SCSI - External Connectors & Cables

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

System/Adapter SCSI Connectors
SCSI Adapter-to-Device Cables
SCSI Device-to-Device Cables
IBM DASD Options
SCSI Standards and Max. Cable Lengths
MCA SCSI Host Adapters in IBM Systems


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


SCSI Adapter-to-Device Cables

Adapter Connector Device Connector Len. FRU P/N OPT P/N
60-pin Mini Centronics 50-pin Centronics
1.5m
5ft
34F0017 32G4143
60-pin Mini Centronics 50-pin Centronics Single-Port 1.5m
5ft
31F4221 31F4187
68-pin Mini Centronics 50-pin Centronics 1.5m
5ft
92F0321 32G3915
68-pin Mini Centronics 50-pin Centronics Single-Port 1.5m
5ft
71G2590 32G3099
68-pin Mini Centronics 50-pin Centronics 1.5m
5ft
92F2559  
68-pin Mini Centronics 68-pin Mini D-Sub 1.5m
5ft
92F0326
52G9501
32G3913
68-pin Mini Centronics 68-pin Mini D-Sub 1m
3ft
06H3231
06H3228
PRADC1M
06H3231
50-pin Mini D-Sub 50-pin Centronics 1.5m
5ft
32G4089 PCSC01Y
50-pin Mini D-Sub 50-pin Centronics Single-Port 1.5m
5ft
32G0397 8191286
68-pin Mini D-Sub 50-pin Centronics 1.5m
5ft
70G9858 SS2C01Y
68-pin Mini D-Sub 50-pin Centronics Single-Port 1.5m
5ft
52G0174 SSSPC1Y
68-pin Mini D-Sub 68-pin Mini D-Sub 1.5m
5ft
06H6036 SS2C02Y

SP - 50-pin Centronics Single-Port for external SCSI Devices with only one SCSI Connector


SCSI Device-to-Device Cables

Device Connector Device Connector Len. FRU P/N OPT P/N
50-pin Centronics 50-pin Centronics 1.5m
5ft
34F0018 6451042
50-pin Centronics 50-pin Centronics 0.5m
1.5ft
92F0325 32G3917
50-pin Centronics 50-pin Centronics Single-Port 0.5m
1.5ft
31F4222 31F4186
68-pin Mini D-Sub 50-pin Centronics 0.5m
1.5ft
92F0442 32G3916
68-pin Mini D-Sub 68-pin Mini D-Sub 0.5m
1.5ft
92F0441 32G3914

SP - 50-pin Centronics Single-Port for external SCSI Devices with only one SCSI Connector


IBM DASD Options

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


MCA SCSI Host Adapters in IBM Systems

Adapter Internal 1 Internal 2 External
SCSI Adapter/A 50-pin edge N/A 60-pin MCX
SCSI Adapter/A (short) 50-pin edge N/A 60-pin MCX
2/3-Length SCSI/A (Japanese) 50-pin header N/A 60-pin MCX
SCSI Adapter w/Cache 50-pin edge N/A 60-pin MCX
2/3-Length SCSI/A w/Cache (Japanese) 50-pin header N/A 60-pin MCX
SCSI-2 Fast (Future Domain) 50-pin header N/A 50-pin HPDB
SCSI-2 Fast/Wide Adapter/A 50-pin edge 68-pin MCX 68-pin MCX
SCSI-2 F/W Differential Adapter/A 50-pin edge 68-pin MCX 68-pin MCX
SCSI-2 F/W RAID Adapter/A 68-pin edge 68-pin edge N/A
SCSI-2 F/W Streaming RAID Adapter/A 68-pin edge 68-pin edge 68-pin MCX

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