Measurement-computing USB-3102 Bedienungsanleitung PDF herunterladen (Seite 16)

USB-3102 User's Guide Functional Details

Connection with

grounded load

Connection with

grounded supply

Grounded

External

Supply

IOUTn

AGND

Floating Load

IOUTn

IOUTn+1

IOUTn+2

Floating Load

IOUTn+1

Floating Load

IOUTn+2

IOUTn

AGND

Grounded

Load

IOUTn+1

IOUTn+2

Floating Supply

IOUTn+1

Floating Ext.

Supply

Floating Supply

IOUTn+1

Floating Ext.

Supply

Floating Supply

IOUTn+1

Floating Ext.

Supply

IOUTn+2

IOUTn

IOUTn+1

IOUTn+2

IOUTn

Figure 6. Typical analog current output circuit

Refer to the manufacturer's information for the device being controlled for additional details.

Current Test terminal (ITEST)

The ITEST connection (pin 51) is used with InstaCal to test the functionality of the analog current output

(IOUT) pins. The ITEST connection circuit is shown in Figure 7.

ITEST

IOUTn

Limit one channel

Figure 7. Current output test circuit

Do not test more that one current output pin at a time. The ITEST output is not adequate for application use. It is

intended for test purposes only.

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