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190-178 IBM Personal System/2 External Storage Enclosure for SCSI Devices (3511-003)
ZG90-0228 IBM PS/2 External Storage Enclosure for SCSI Devices (3511-004)
S15F2158 IBM PS/2 Ext Storage Enclosure For SCSI Devices HMR (BOO format)
IBM 3511 PS/2 SCSI Expansion Box (video by uniservo)
Common Devices
Power Supply
Operator/Indicator Panel
Specifications
Load Distribution Card
Load Distribution Card Schematic
3511 Chassis
Specifications
- 7 half-height (non-array) or 7 slim hot-swap + 2 half-height bays (array)
- Up to 7 hard disks
- Up to 2 CD-ROM drives
- Full-height SCSI Tape Drive for backups
- 3.5" Rewritable Optical Drive
- SCSI interface
- 329 W (non-array) or 399.1 W (array) power supply
Load Distribution Card FRU P/N 64F0139, P/N 57F2092
![[P]](/other/img/photo.gif "Front")
Load Distribution Card Schematic
3511 Chassis (photos by an unknown ebay seller)
The 3511 is based on the 8595 1S1P chassis.
The I/O opening and 5 of the 8 MCA slots are blocked from the outside
by a plastic cover. Slot #1 holds an external SCSI connector.
The planar is replaced by a small Load Distribution
Card that connects to the PSU planar connector, provides a dummy load for
the +5 V rail, and a connection to the Op Panel.
More photos can be found HERE (courtesy of "Mad Max"
and an unknown ebay seller).
| ![[P]](Distrib_Photo_Front.jpg "Front"){kind=small}
![[P]](Distrib_Photo_Back.jpg "Back"){kind=small}
![[P]](Distrib_Photo_Detail1.jpg "Detail 1"){kind=small}
![[P]](Distrib_Photo_Detail2.jpg "Detail 2"){kind=small}
