*
Pin #34 is gated by "drive select" signal when "TH" plug is opened.
Pin #34 is not gated by "drive select" signal when "TH" plug is closed.
2.4
Power interface
The drive only requires
power for operation. D.C. power to the drive is provided
via P2/J2. The two
voltages, their specifications and their P2/J2 pin designation
is outlined in table 2-1.
Table 2-1. D.C. power requirements
*
+12V and +5V ground returns are tied together at drive PCB.
14
Not
Insert
Insert
Power On
Media
Drive select
Step
Pin#34
Figure 2-3. Timing diagram of disk change
Max ripple
Current
Tolerance
Voltage
+12V
+12V Return
+5V Return
+5V
±10%
(±1.2V)
*
*
±5% (±0.25V)
0.22A typ
0.54A max.
0.9A peak
0.48A typ
0.58A max.
100mV p-p
50mV p-p
P2/J2 pin
1
2
3
4
Leaflet No. 9419 26/4/97 6:09 pm Page 14
