Specifications
-
0'
The
de
power to a
706/712
drive
Is
via connector
Jl/Pl
located on
the
solder side of the PCB. The two
de
I
vohages and their specifications, along
with
the
Jl/Pl
pin designations are
shown
in
table 2·2.
Power from
the
+5
and
+ 12V supplies
may
be
applied In
any
order. However.
the
+
5V
power must
be
assened
within
20
seconds of
the
+
12V
power-on application.
These drives require
ac
grounding of
the
buepl~te.
Thls grounding is accomplished in either
of
two ways:
a.
The
de
voltage returns
(+
12
V
and
+5
V)
are tied to
the
ac
ground
at the power supply.
b.
A separate
ground
wire (#18 AWG
or
larger)
is
attached
to
a grounding lug
on
the baseplate
in
the
vicinity of
the
interface connectors.
PI
PIN.
oc
VOLTAGE
TOLERANCE
CURRENT
MAX
RIPPLE
(P
TO
P)
. 1
+12
V
~0.6
V
DC
.75
A TYPICAL 500
mV
MAX
:t
1.2 V
STARTING'
3.9
A STARTING-
ALLOWABLE
2
+ 12 V RETURN
3
+5
V RETURN
4
+5V
:0.25
V
DC
1.6 A
TYPICAL
50
mV
MAX
ALLOWABLE
.
2.4
A
MAX
39026·t6-C
392521().A
'*
TABLE
2·2.
DC
REQUIREMENTS
---I
--+I
I...-
12
SEC
TVP
I I.
I
-TKOO
-READY
DC
POWEAON
DISK
AT
SPEED
I J _
I
+f
r---
9.0
SEC
MAX
J _
I
~
1__
18 male
TYP
~
~
46 male
MAX
-SEEK
COMPLETE
-----~i
--
_
·10SECMAX.
*FIGURE 2·11. GENERAL CONTROL TIMING REQUIREMENT
2.8 FRAME GROUNDING
2.7
POWER INTERFACE
These drives require only dc
power
for operation.
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2·91
2·10 (blank)