Chapter 3
Signal Connections
©
National Instruments Corporation
3-3
I/O Connector Signal Connection Descriptions
Refer to Table 3-1 for pin assignments for the DAQPad-6508.
Table 3-1. Pin Assignments for the DAQPad-6508
Pin
Signal Name
Description
1, 3, 5, 7, 9, 11, 13, 15
APC<7..0>
Bidirectional Data Lines for Port C of
PPI A—APC7 is the MSB, APC0 the LSB.
17, 19, 21, 23, 25, 27, 29, 31
APB<7..0>
Bidirectional Data Lines for Port B of
PPI A—APB7 is the MSB, APB0 the LSB.
33, 35, 37, 39, 41, 43, 45, 47
APA<7..0>
Bidirectional Data Lines for Port A of
PPI A—APA7 is the MSB, APA0 the LSB.
2, 4, 6, 8, 10, 12, 14, 16
BPC<7..0>
Bidirectional Data Lines for Port C of
PPI B—BPC7 is the MSB, BPC0 the LSB.
18, 20, 22, 24, 26, 28, 30, 32
BPB<7..0>
Bidirectional Data Lines for Port B of
PPI B—BPB7 is the MSB, BPB0 the LSB.
34, 36, 38, 40, 42, 44, 46, 48
BPA<7..0>
Bidirectional Data Lines for Port A of
PPI B—BPA7 is the MSB, BPA0 the LSB.
51, 53, 55, 57, 59, 61, 63, 65
CPC<7..0>
Bidirectional Data Lines for Port C of
PPI C—CPC7 is the MSB, CPC0 the LSB.
67, 69, 71, 73, 75, 77, 79, 81
CPB<7..0>
Bidirectional Data Lines for Port B of
PPI C—CPB7 is the MSB, CPB0 the LSB.
83, 85, 87, 89, 91, 93, 95, 97
CPA<7..0>
Bidirectional Data Lines for Port A of
PPI C—CPA7 is the MSB, CPA0 the LSB.
52, 54, 56, 58, 60, 62, 64, 66
DPC<7..0>
Bidirectional Data Lines for Port C of
PPI D—DPC7 is the MSB, DPC0 the LSB.
68, 70, 72, 74, 76, 78, 80, 82
DPB<7..0>
Bidirectional Data Lines for Port B of
PPI D—DPB7 is the MSB, DPB0 the LSB.
84, 86, 88, 90, 92, 94, 96, 98
DPA<7..0>
Bidirectional Data Lines for Port A of
PPI D—DPA7 is the MSB, DPA0 the LSB.
49, 99
+5 V
+5 V—These pins are connected to the
DAQPad’s +5 VDC supply.
50, 100
GND
Ground—These pins are connected to the
computer’s ground signal.
Note: Pins 49 and 99 are connected to the +5 V PC power supply via a 1 A self-resetting fuse.
