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Data Express DE100 Narrow SCSI Install Guide
Removable SCSI Narrow Single-Ended Drive Enclosure
Receiving Frame Motherboard
ID Select Pins (J4):
Pins 1-14 are reserved. Pins 15-20 of
this connector provide unit SCSI ID selection for the com-
puter system or expansion chassis. For remote ID selection
through an expansion chassis, the unit ID must be set to “0”
or open (no jumpers installed) on these pins (refer to Figure
3 for further information).
Enable Termination Power To/From SCSI Bus (W1):
The rear panel contains the bus terminators (active) for 8-bit
Single-Ended SCSI interfaces. Jumper is installed at the
factory.
Onboard Termination (W2):
Position “A” is installed at
the factory and will disable termination. Moving the jumper
to Position “B” will enable onboard termination.
To select the DE100 Narrow SCSI unit ID remotely through
the computer system or external expansion chassis, the ap-
propriate cable from the system must be connected to the
ID select connector (J4) on the rear of the receiving frame
as shown in Figures 2 & 3.
Figure 1: Drive Installation Overview
Figure 3: Receiving Frame Connector (J4) Pin Confi guration
Figure 2: Receiving Frame Motherboard (rear view)
