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supplied, i s
A M P P a r t N u m b e r 1 - 4 8 0270-0,
using AM P
c o n t ac t P ar t N u m b e r 6 0 6 1 91-1.
Pin assignments are found in Table 3-2.
T he ch assis s h ould b e
ground to ensure proper operation.
TABLE 3-2
D . C. POWER CONNECTO R
PIN ASSIGNMENTS
Pin
3.6 D R IVE ADDRESS AND
OPTION STRAPPING
The drive address and option strapping is
determined by the different ju m per configura-
t ions r e q u ired
f o r s p e c i fi c s y s te m a p p l i c a -
tions. If j u m p e r c o nf i gur a t i ons are ch anged,
power should be cycled off and on so the micro-
processor can recognize the new configuration.
T he d e scriptio n
o f u s e r - selectable o p t i o n s
should be used in conjunction with Table 3-3.
Throughout Section 3.6, an X denotes jumper
i nstallation ,
a n d a das h de n o t e s j u m p e r
removed.
DRIVE SELECT (DS1 — DS4)
This option allows the user to daisy chain up
to four drives, and to enable one drive at a
c o n n ected t o e a r t h
Supply Voltage
+24 volts D. C.
24 volts Return
5 volts Return
+5 volts D. C.
Return
time. Drive Select is implemented by shorting
o ne of the f our connections, using a shorti n g
plug. The drive comes equipped from the fac-
tory with DS1 installed. All outputs are gated
with drive select, as set-up at the factory.
DS1 DS2 DS3
X
X
HEAD SELECT OPTIONS
(S1 — S3 and 1 B — 4B)
The Side Select options allow the user to select
the heads by vari ous means. They are im pl e-
m ented by r e m oving t h e s h ort in g p lu g f r o m
the DS1 — DS4 option pads.
HEAD SELECT USING DRIVE SELECT
T o use th e D r i v e S e l ect l i n e s t o s e lect t h e
h eads, etch cut S 2 an d i n s t al l S 3 al ong w i t h
one of the 1B — 4B jumpers. The 1B — 4B con-
trol signal selected may not be the same con-
trol line used for Drive Select, or an undefined
c ondition results. When th e control l i n e t h a t
c orresponds t o
driven low (true), the drive is enabled, and the
lower head, Head 0, is selected. When the con-
trol
l i n e t h a t c o r r e sponds t o t h e 1 B — 4B
j umper i s
d r i v e n l o w (t r u e ) , t h e d r i v e i s
enabled, an d
selected.
3-8
DS 4 D R IVE SELECT
Selects Drive 0 via
J1-26.
Selects Drive 1 via
J1-28.
Selects Drive 2 via
J1-30.
X
Selects Drive 3 via
J1-32.
t h e D r i v e S e l ect j u m p e r i s
t h e u p p e r h e a d , H e a d 1 , i s
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