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3.6 Signal Connection- Current Loop

The basic CIO-DAC##-I current output circuit is shown in Figure 3-2. Loop power

is from an external power supply. The supply voltage is from 6V to 36V, with 24V

or 36V being typical choices.

Figure 3-2. Basic Current Loop

The 4 to 20 mA loop can be configured with either a floating power supply (Figure

3-3) or a floating load (Figure 3-4).

Figure 3-3. I-Loop, Floating Supply Figure 3-4. I-Loop, Floating Load

4-20mA Control

LLGND

4-20mA Control

LLGND

Floating

Supply

Grounded

Load

4-20mA Control Board

4-20mA Control

LLGND

Supply

Load

4-20mA Control Board

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Measurement-computing CIO-DAC16-I Manuale Utente Pagina 9