Power
Supply
One voltage, +
12
V dc
is
taken from
the
host
computer
and
output
as a regulated power supply
to
external
devices on
the
link. Up
to
1 A
can
be
supplied
to
devices.
When
configuring HP-HIL
devices
with
Series 300 computers, care rnust
be
used
to
ensure
the
total
power drawn by all
devices does
not
exceed 1
A.
In Table 3-2, devices are listed with
their
power requirements.
Table 3-2.
HP-HIL
Devices
and
Power
Requirements
Product
No.
Device
Name
Milliamps
HP
35723A
Touchscreen Bezel
250
HP
46020A
ITF
Key
board
100
HP
46021A
ITF
Key
board
145
HP
46060A
HP
Mouse 200
HP
46080A
Extension Module
25
HP
46081A
3 Metre
Ext.
25
HP
46082A/B
15/30
Metre
Extension
l
50
HP
46083A
Rotary
Control Knob
110
HP
46084A
ID Module 60
HP
46085A
Control
Dials
350
HP
46086A
Button
Box
80
HP
46087A2 "A" -Size Digitizer2
200
HP
46088A
2
"B" -Size
Digitizer2
200
HP
46094A
Quadrature
Port
Device
3
80
HP
46095A
Three-Button
Mouse 80
HP
92916A
Barcode
Reader
100
Notes: 1 Extension cables have two boxes, each draws
25
rnA.
2 Includes
HP
46089A
4-Button
Cursor.
Watts
3.0
1.2
1.74
2.4
0.3
0.3
0.6
1.32
0.72
4.2
0.96
2.4
2.4
1.2
0.96
1.2
3
Port
Device requires 80 rnA
and
the
device
attached
to
it
cannot
exceed 120 rnA.
Computer-Link
Interface
Series 300
computer
DIO bus
architecture
is interfaced
to
the
HP-HIL
microprocessor in these
circuits.
They
allow device
input
data
to
be
used by
the
host computer.
Functional Description
49
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