2.5
Frame ground
Frame ground for the drive is provided by a push-on tab terminal, mounted directly
on the rear of the drive.
When the host system's input power is
, the drive's frame must be grounded to
the third wire safety ground. If the host system is
powered, the frame ground
may be tied to the
power ground.
2.6
System power and ground distribution
To provide optimum performance and noise immunity, extreme care must be used to
provide low noise grounds. Independent frame ground wires should run from each
drive and other system components to a single point system frame ground.
15
0.7A typ
250ms max.
0.69A typ
0.6A typ
0.5A typ
2ms typ
1ms typ
4ms max.
Standby
Motor on Settled ON
track spindle
running
Seek rate
3ms
Write
Read
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Typical
current
(A)
12V
5V
Figure 2-4. D.C. power profile
Leaflet No. 9419 26/4/97 6:09 pm Page 15
