Choosing A Power Supply - Datatech Enterprises Apex 386/25 User Manual

Choosing a Power Supply

A 200W power supply is installed in your system. But, if you need to
purchase a power supply in a later time, the following information will
be of interest.
The power supply provides a "power-good" signal to indicate proper
operation of the power supply. The power-good signal is a TTL-com-
patible high level for normal operation or a low level for fault conditions.
If the power-good signal works well, the system will function properly.
Otherwise, the data setting in the CMOS RAM will be lost. Since the
PEM-2530 is an 80386 PC, a minimum 200W power supply is strongly
recommended in order to ensure reliability.
The following is recommended for choosing a suitable power supply
• The power-good signal should have a turn-on delay of at
least 250ms but not longer than 500ms when the power is
on (This means that the power-good signal goes to a high
level later than +5V.).
• The power-good signal goes to a low level at least 100ms
before the +5V power falls below the regulation limits when
the power is off.
To install a power supply in your system case you may need to consult
your dealer for information. Installation is a simple and straightforward
procedure.
After you have completed connecting the cables and installing the
RAM Cards, close the case according to the instructions in your system
manual. Now you are ready to go.
Chapter 2: Setting Up Your System 25