Connecting One Expansion Box - Digital Equipment DECsystem 5100 Installation Manual

4.5 Connecting One Expansion Box
To connect a single expansion box to your system unit, perform the following
steps:
Set the on/off switches on the system unit and expansion box to the off
(0)
position.
2
Turn the expansion box so that the back is facing you.
3
Verify the SCSI ID switch positions.
Each device is shipped from the factory with the SCSI switches set in a
default position. See the documentation supplied with your expansion box
to determine the default SCSI ID for that device.
Note Dual drive expansion boxes contain two devices and have two sets of SCSI
ID switches that must be set to different IDs. Remember, no two devices on
the SCSI bus can occupy the same SCSI ID. See the documentation supplied
with your expansion box for more information on setting SCSI IDs.
4
Set the SCSI ID on the expansion box to an open ID if the default ID is
occupied by another device on the bus.
5
Connect the expansion box cable as follows:
Connect one end of the 50-pin to 50-pin connector cable to the SCSI port on
the back of the system unit and snap the bail lock loops in place.
Connect the other end of the 50-pin to 50-pin connector cable to either port
on the back of the expansion box and snap the bail lock loops in place.
6
Connect a 50-pin terminator to the unused port on the expansion box.
Figure 4-4 shows you what the 50-pin terminator looks like.
Figure 4-4 50-pin Terminator
ML0-002346
Caution Make sure that the voltage requirement of the expansion box is compatible
with the supply voltage.
Installing Peripheral Devices 4-7