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I/O Connector Signal Description

Table 3-2 I/O Connector Signal Description

Signal Name Reference Direction Description

Vout<0..3> AGND Output Voltage Output, Channels 0 through 3.

Iout<0..3> AGND Output Current Output, Channels 0 through 3.

AGND - -

Analog Ground. The two ground references (AGND and

DGND) are connected together on the PCI-1723 card.

DI0<0..15> DGND -

Digital Input / Output signals. These pins are digital input /

Output channel 0 to 15.

DGND - -

Digital Ground. The two ground references (AGND and

DGND) are connected together on the PCI-1723 card.

+12V DGND Output

+12 V

Source (from PCI bus directly with FUSE

protection).

+5V DGND Output

+5 V

Source (from PCI bus directly with FUSE protection).

Analog output connection

The PCI-1723 provides eight D/A output channels, Vout_0 ~ Vout_7

and Iout_0 ~ Iout_7. Users may use the PCI-1723 internally-provided

precision -5V (-10V) reference to generate 0 to +5 V (+10 V) D/A

output range. Users also may create D/A output range through external

references, REF_V0 ~ REF_V3. The external reference input range is

+/-10 V. For example, connecting with an external reference of -7 V

will generate 0 ~ +7 V D/A output.

Figure 3-3 shows how to make analog output and external reference

input connections on the PCI-1723.

FIFO

MUX

Data Bus

AGND

Load

Internal External

+5 V

External Reference

For D/A Signal n

REF_VnREF_INT

Vout_n

D/A n

Local Bus

n: 0~7

Figure 3-3: Analog output connections

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 59 60

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