Preparing for the Installation
1–9
Figure 1–5 Primary Breakout Module
The numeric callouts in the figure identify the following key components:
1
SCSI termination and watchdog reset signal jumpers
2
Connector for the secondary breakout module or an external monitoring
device
3
SCSI cable connector
A reset input signal on pin C10 of the primary breakout module’s VMEbus P2
connector is available for resetting the SBC. This signal is low during normal
operation and high during a watchdog timer reset in parallel with the Reset switch
on the SBC’s front panel. Because pin C10 is a nonbuffered input pin, you should
use shielded wiring to apply the reset input signal.
Caution
You must use the primary breakout module included in your Alpha VME
5/352 or 5/480 SBC hardware kit. Applying power to an Alpha VME
5/352 or 5/480 SBC WITHOUT that primary breakout module in place,
or WITH the breakout module included with the AXPvme 160, 166, or
230 (part number 54-22605-01) in place, may damage your backplane,
the Alpha VME 5/352 or 5/480 SBC, or both.
1.4.6 Secondary Breakout Module
The secondary breakout module is an optional module that connects to the pri-
mary breakout module. Connectors on the secondary breakout module include a
PS/2 keyboard and mouse Y-cable connector and a parallel port connector. The
primary use of this module is to add a serial-line (keyboard and mouse) connector
and parallel port to the rear of the VME chassis.
Figure 1–6 shows the secondary breakout module.
ML013784
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3
1