Measurement-computing CIO-DAS16 Manual do Utilizador descarregar pdf (Página 18)

3.3.1 Common Ground / Single-Ended Inputs

Single-ended is the recommended configuration for common ground connections. However, if some of your inputs are

common ground and some are not, we recommend you use the differential mode. There is no performance penalty (other

than loss of channels) for using a differential input to measure a common ground signal source. However the reverse is

not true. Figure 3-4 below shows a recommended connection diagram for a common ground / single-ended input system

NOTE: For simplicity, the input multiplexer is not shown in the following diagrams.

Figure 3-4.

Single-Ended

Input

3.3.2 Common Ground / Differential Inputs

The use of differential inputs to monitor a signal source with a common ground is a acceptable configuration though it

requires more wiring and offers fewer channels than selecting a single-ended configuration. Figure 3-5 shows the

recommended connections in this configuration.

Figure 3-5. Common Ground - Differential Input

Input

Amp

To A /D

A/D Board

I/O

Connector

LL GND

CH IN

Signal

Source w ith

Common G nd

Optional wire

since signal source

and A/D board share

common ground

nal source and A/D board

sharin

common

round connected

to sin

le-ended input.

Input

Amp

To A /D

A/D Board

I/O

Connector

LL GND

CH High

CH Low

Signal

Source with

Comm on Gnd

Optional wire

since signal source

and A/D board share

common ground

Required connection

of LL GND to CH Low

nal source and A/D board

sharin

common

round connected

to differential input.

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