Specifications

CHAPTER 4
Expansion Features
Expansion Bay for SCSI Devices 67
the mounting holes on the SCSI device. The SCSI device with carrier slides into the
enclosure and snaps into place on the carrier guide.
Expansion Bay Door 4
The plastic expansion bay door (Apple part number 815-2344, manufactured by Li Xin
Plastic Industries, AppleLink LI.XIN) and attached EMI shield (Apple part number
805-1393, available from Allied Technologies and Shinei Sangyo in Singapore) must be
modified to provide room for any opening requirements of the SCSI device to be
installed. The dimensions for the maximum area on the bay door that can be modified
are shown in Figure 4-9.
Figure 4-9 Maximum useable area for device opening on bay door
Connector Specifications 4
The expansion bay contains three connectors that are accessible through the top of the
sheet metal enclosure. The connectors are a 4-pin power connector, a 50-pin SCSI
connector, and a 4-pin audio connector. Each connector is on a cable at the rear of the
expansion bay. You can access the connectors to connect or disconnect a SCSI device in
the expansion bay by removing the top cover.
Power Connector 4
The power connector is a keyed 4-pin shrouded connector with four contact sockets. The
pin assignments are shown in Table 4-14.
Table 4-14 Pin assignments for the expansion bay power connector
Pin number Value
1 +12 Volts
2 + 12 Ret
3 +5 Ret
4 +5 Volts
45.8 [1.803]
13.40 [0.528]
151.3 [5.970]