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supplied, is AMP Part Number 1-480270-0,
using AMP contact Part Number 606191-l.
Pin assignments are found in Table 3-2.
The chassis should be connected to earth
ground to ensure proper operation.
TABLE 3-2
D. C. POWER CONNECTOR
PIN ASSIGNMENTS
Pin
Supply Voltage
1
+
24 volts D. C.
2
24 volts Return
3
5 volts Return
5
+
5 volts D. C.
6
Return
3.6
DRIVE ADDRESS AND
OPTION STRAPPING
The drive address and option strapping is
determined by the different jumper configura-
tions required for specific system applica-
tions. If jumper configurations are changed,
power should be cycled off and on so the micro-
processor can recognize the new configuration.
The description of user-selectable options
should be used in conjunction with Table 3-3.
Throughout Section 3.6, an X denotes jumper
installation, and a dash denotes jumper
removed.
DRIVE SELECT (051-054)
This option allows the user to daisy chain up
to four drives, and to enable one drive at a
3-8
time. Drive Select is implemented by shorting
one of the four connections, using a shorting
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.
DSl DS2 DS3 DS4 DRIVE SELECT
X
Selects Drive
°
via
J1-26.
X
Selects Drive 1 via
J1-28.
X
Selects Drive 2 via
J1-30.
X
Selects Drive 3 via
J1-32.
HEAD SELECT OPTIONS
(51 -53 and 1 8-48)
The Side Select options allow the user to select
the heads by various means. They are imple-
mented by removing the shorting plug from
the DS1-DS4 option pads.
HEAD SELECT USING DRIVE SELECT
To use the Drive Select lines to select the
heads, etch cut S2 and install S3 along with
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
condition results. When the control line that
corresponds to the Drive Select jumper is
driven low (true), the drive is enabled, and the
lower head, Head 0, is selected. When the con-
trol line that corresponds to the 1B-4B
jumper is driven low (true), the drive is
enabled, and the upper head, Head 1, is
selected.
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