Powering The Hard Disk Drives - ReActiveMicro MicroDrive Turbo Owner's Manual

The IDE Cable does not supply power to the Hard Disk Drives.
The External Hard Disk Drive(s) must be powered from a Secondary Power Source,
either by power adapter or case with its own power source.
Caution: Up-to-date MicroDrive Turbo boards' have +5v connected to Pin 20 of
the IDE Connector. Be sure to use a cable as shown on the previous
page.
You need to adhere to the following in order for all to work correctly:
✔ The Apple II
✔ The Power Supply to the Hard Disk Drive(s) is then turned on second.
Wrong order and the drive may not spin up.
✔ The Two Power Supplies must have a common ground.
Without this the MicroDrive Turbo may not see the Hard Disk Drive(s).

Powering the Hard Disk Drives

External hard drives attached to the MicroDrive Turbo Card must be supplied by an
external power supply. The MicroDrive Turbo Card was intentionally designed to not
supplying power for the disk drives. Due to excessive current flow, the data integrity
and proper functioning of the MicroDrive Turbo Card would suffer if power were
drawn via the slot connector. This is a matter of precaution.
When using an external power supply, be sure to use the same wall outlet as your
Apple II Computer (to avoid any potential ground loop problems).
Note: Configuring a Hard Disk Drive requires proper documentation. Specifications
for most Hard Disk Drives can be found with proper research via the Internet.
MicroDrive Turbo
has to be turned on first.
GS
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