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National Instruments Low-Cost Multifunction I/O Board for ISA Lab-PC+ User Manual

Page 34

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Chapter 3

Signal Connections

© National Instruments Corporation

3-3

Lab-PC+ User Manual

Pin

Signal Name

Description

1-8

ACH0 through ACH7

Analog input Channels 0 through 7 (single-ended).

9

AISENSE/AIGND

Analog input ground in RSE mode, AISENSE in NRSE
mode. Bi-directional.

10

DAC0 OUT

Voltage output signal for analog output Channel 0.

11

AGND

Analog ground. Analog output ground for analog
output mode. Analog input ground for DIFF or NRSE
mode. Bi-directional.

12

DAC1 OUT

Voltage output signal for analog output Channel 1.

13

DGND

Digital ground. Output.

14-21

PA0 through PA7

Bidirectional data lines for Port A. PA7 is the MSB,
PA0 the LSB.

22-29

PB0 through PB7

Bidirectional data lines for Port B.
PB7 is the MSB, PB0 the LSB.

30-37

PC0 through PC7

Bidirectional data lines for Port C.
PC7 is the MSB, PC0 the LSB.

38

EXTTRIG

External control signal to start a timed conversion
sequence. Input.

39

EXTUPDATE*

External control signal to update DAC outputs. Input.

40

EXTCONV*

External control signal to trigger A/D conversions.
Bi-directional.

41

OUTB0

Counter B0 output.

42

GATB0

Counter B0 gate. Input.

43

COUTB1

Counter B1 output or pulled high (selectable).

44

GATB1

Counter B1 gate. Input.

45

CCLKB1

Counter B1 clock (selectable). Input.

46

OUTB2

Counter B2 output.

47

GATB2

Counter B2 gate. Input.

48

CLKB2

Counter B2 clock. Input.

49

+5V

+5 V out, 1 A maximum. Output.

50

DGND

Digital ground. Output.

*Indicates that the signal is active low.