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2. OPERATION
2.1 GENERAL
Power-on/off for the unit is described in this section.
2.2 POWER ON/OFF SEQUENCE
The M2301 B/M2302B micro disk drive has no power ON/OFF switch of its own.
Therefore, power ON/OFF for the micro disk drive is performed by the power ON/OFF
function of the system.
If the write gate signal coming from the controller is kept OFF in advance to a power-on
or power-off, a sequence of the power source (+24V, +5V, -5V/-7V to -16V) of the
device is unnecessary. That is, the stored data is not destroyed and mechanical and
electric errors do not occur. In order to keep the write gate signal OFF during a power-
ON/OFF transition, the power source of the controller and the device must adhere to the
following sequence.
(1 ) Basic Sequence
90%
~~~---~~ ~------=~~90%
Power Source for Controller
(
(Whole input power vol.;.;,ta""ge;,;;.;s)_--,
\
Power Source for Disk
/ '
(+24V.+5V.-5V/-7Vto-16V)
- ' - 10%
--.----+-"'1
,
Over 0 SEC
Over 0 SEC
Power-On/Off Sequence
(2)
By detecting the +5V voltage level in the drives the write gate signal is inhibited and
power sequencing is unnecessary if the +5V power source for the drive is supplied
from the +5V power source for the controller, and the interface signal from the
controller is determined only by the +5V power source for the controller.
B03P-4605-0003A .... B
2-'
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