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Chapter 4
Signal Connections
DAQCard-DIO-24 User Manual
4-6
©
National Instruments Corporation
Table 4-3.
Cable Connector Pin Descriptions
Pin
Signal
Name
Description
1, 3, 5, 7, 9, 11, 13, 15
PC<7..0>
Port C—Bidirectional data
lines. PC7 is the MSB; PC0 is
the LSB.
2, 4, 6, 8, 10, 12, 14, 16,
18, 20, 22, 24, 26, 28,
30, 32, 34, 36, 38, 40,
42, 44, 46, 48, 50
GND
Ground—These signals are
connected to the computer
ground signal.
17, 19, 21, 23, 25, 27,
29, 31
PB<7..0>
Port B—Bidirectional data
lines. PB7 is the MSB; PB0 is
the LSB.
33, 35, 37, 39, 41, 43,
45, 47
PA<7..0>
Port A—Bidirectional data
lines. PA7 is the MSB; PA0 is
the LSB.
49
+5 V
+5 Volts—This pin provides
+5 VDC. The +5 V supply is
fused by a thermal resettable
fuse rated at 1.0 A, which is the
maximum current available.
Note that the thermal resettable
fuse will begin to open after
exceeding 1.0 A and will return
to normal operating conditions
when cooled.
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