Measurement-computing CIO-DAS6402/12 Instrukcja Użytkownika Pobierz pdf (Strona 17)

Figure 4-9. Isolated Grounds / Single-Ended Input

4.2.7 ISOLATED GROUNDS / DIFFERENTIAL INPUTS

Optimum performance with isolated signal sources is assured with the use of the differential input setting. Figure 4-10 below shows

the recommend connections is this configuration.

Figure 4-10. Isolated Grounds / Differential Inputs

4.3 ANALOG OUTPUTS

Analog outputs are simple voltage outputs which can be connected to any device which will record, display or be controlled by a

voltage. The CIO-DAS6402 analog outputs are 4 quadrant multiplying DACs. This means that they accept an input voltage

reference and provide an output voltage which is inverse to the reference voltage and proportional to the digital value in the output

For example, the supplied reference of

−

5V provides a +5V output when the value in the output register is 4095 (full scale at

12-bits of resolution). It provides a value of 2.5V when the value in the output register is 2048.

The output ranges of the CIO-DAS6402/12 are set by software. The output ranges of the CIO-DAS6402/16 are set by dip switch.

Please refer to Section 3 for information regarding setting these switches.

Isolated Signal Source

Connected to a Single-Ended Input

I/O

Connector

Input

Amp

To A /D

LL GND

CH IN

A/D Board





Isolated

signal

source

Input

Amp

To A/D

A/D Board

I/O

Connector

LL GND

CH High

CH Low





Signal Source

and A/D Board

Already Isolated.

Already isolated signal source

and A/D board connected to

a differential input.

GND

These grounds are

electrically isolated.

10 K

10K is a recommended value. You may short LL GND to CH Low

instead, but this will reduce your system’s noise immunity.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 39 40

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