Motorola 900 series - Internal Modem; Power Switch

CPU Module
Internal Modem
Mounting and direct plug-in connection for the 9600 BPS service modem is
provided on the I/0 distribution board. The modem is a functional equivalent
of the modem transition board, the MVME733. See the MVME733 Modem
Operations Manual,
part number MVME733, for additional information.
Power Switch
2-4
The power control switch is on the front panel of the CPU Module. It is
connected to the
I/0 distribution board. The I/0 distribution board uses the
5V supplied by a small power supply in the Base to turn on the power supplies
in the modules that make up a stack. The small +5 V power supply in the base
is part of the Base Unit Power system, and it is on all the time AC power is
connected.
This
switch has three positions: Standby Power, Run, and Reset. The reset
function of this switch is for modem and/ or environmental monitor reset, it
does not generate VME bus reset. The single board computer's VME front
panel switch for Abort and System reset that are accessible in the rear of the
module are used for abort and system reset functions.
Table 2-1. Keylock Switch Settings
Key Position Effect
6
System is not operational. DC power is of( but AC
power is still available. Turn the key to this
position for
system shutdown.
I
System is in normal operating or nm mode.
<I
Resets the modem and environmental monitoring
function
on the 1/0 Distribution board. The abort
and system reset functions are on the single board
computer's front panel switch, located on the rear
of the CPU Module.
Reference Guide
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