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TABLE 1:
J1 Host/Drive
Pin Assignments
GROUND
SIGNAL
RTN PIN
PIN
SIGNAL NAME
1
2
RESERVED
3
4
RESERVED
5
6
-WRITE GATE
7
8t
-SEEK COMPLETE
9
10
-TRACK ~
11
12t
-WRITE FAULT
13
14
-HEAD SELECT 20
15
16
RESERVED
17
18
-HEAD SELECT 2
1
19
20t
-INDEX
21
22t
-READY
23
24
-STEP
25
26
-DRIVE SELECT 1
27
28
-DRIVE SELECT 2
29
30
-DRIVE SELECT 3
31
32
-DRIVE SELECT 4
33
34
-DIRECTION IN
tSTATUS ENABLED WITH DRIVE SELECT
FLAT RIBBON OR
TWISTED PAIR 20 FT. MAX
1 -
RESERVED
2
•
3'1~
RESERVED
4
5~~
·
WRITE GATE
-
6
. .
7 -4~
..
::
SEEK COMPLETE
8
9~~
·
.:::
TRACK _
10
11-1~
•
WRITE FAULT
12
•
13~~
HEAD SELECT 2°
~
14
•
15-4~
RESERVED
16
17
"'1~
·
HEAD SELECT 2
1
-;-
18
19,
t
-
INDEX
20
21-4
~
•
...
-READY
22
23-4_
STEP
-
24
. .
25-i~
DRIVE SELECT 1
26
27-4_
..
DRIVE SELECT 2
-
28
..
29~~
. .
DRIVE SELECT 3
-;
30
31 '1~
....
DRIVE SELECT 4
32
33-4~
·
DIRECTION IN
-;-
34
-==-
-
"
+5 VOLTS OC
-
4
l
+ 5 VOLTS RETURN
3
....
....,
r"\
+12 VOLTS OC
-=-
1
l
•
'\J
+
12 VOLTS RETURN -
2
-== -
DCGND
~
~
"...77
TWISTED PAIR
FRAME GND
(18 GA or larger)
FRAME GND
FIGURE 4:
Control/Status Signais
HOST
ST212 PRODUCT MANUAL/Rev. B
ST212
J1
l
J3
J
7
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