Measurement-computing PCM-DAS16D/12 Uživatelský manuál stáhnout pdf (Strana 20)

However the reverse is not true. The diagram below shows a recommended connec-

tion diagram for a common ground / single-ended input system.

4.2.2 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. The diagram below shows the recom-

mended connections in this configuration.

4.2.3 Common Mode Voltage < ±10V / Single Ended Inputs

This is not a recommended configuration. In fact, the phrase common mode has no

meaning in a single-ended system and this case would be better described as a system

with offset grounds. Anyway, you are welcome to try this configuration, no system

Input

Amp

To A /D

A/D Board

I/O

Connector

LL GND

CH IN

Optional wire

since signal source

and A/D board share

common ground

Signal source and A/D board

sharing common ground connected

to single-ended input.

Input

Amp

To A/D

A/D Board

I/O

Connector

LL GND

CH High

CH Low

Optional wire

since signal source

and A/D board share

common ground

Required connection

of LL GND to CH Low

Signal source and A/D board

sharing common ground connected

to differential input.

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