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PCI-1720U User Manual 24

Chapter 5 Signal Connections

5.1 Overview

Making correct signal corrections is important for accurate data transmis-

sions. Since most data acquisition applications involve some form of

voltage measurement, making a sound signal connection will also protect

your equipment against possible damage. This chapter shows you how to

make proper signal connections to use PCI-1720U.

5.2 D/A Voltage Output Connections

PCI-1720U supports four channels of D/A voltage output. Only one out-

put signal wire is used with each channel. The voltage output is refer-

enced to a common ground (AGND).

There are three types of voltage output connections:

1. Floating load.

2. Grounded load.

3. Differential load with ground.

They are shown in the following illustrations.

Figure 5.1: Floating-load Connection for D/A Voltage Output

D/A

Internal Side

OUT

AGND

External Side

Floating

Load

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