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USB-1608FS-Plus User's Guide Functional Details

Figure 3. Screw terminal pinout

Signal connections

Analog input

You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 (CH0 IN

through CH7 IN.) Connect unused analog input terminals to ground terminals during operation. For example, if

you are not using terminal 15 (CH7 IN), connect this terminal to terminal 16 (AGND).

All analog input channels are configured for single-ended input mode. All analog input signals are referenced to

ground (AGND):

 Connect the wire carrying the signal to be measured to CH# IN.

 Connect the second wire to AGND.

The input voltage ranges are ±10 V, ±5 V, ±2.0 V, ±1.0 V.

For more information on analog signal connections

For more information on single-ended inputs, refer to the Guide to Signal Connections (this document is

available on our web site at www.mccdaq.com/signals/signals.pdf).

Channel-Gain queue

The channel-gain queue feature allows you to configure a different gain setting for each channel. The gain

settings are stored in a channel-gain queue list that is written to local memory on the device.

The channel-gain queue list can contain up to eight unique elements. The channel list must be in increasing

order. An example of a five element list is shown in the table below.

Sample channel-gain queue list

Element

Channel

Range

CH0

BIP1V

CH2

BIP2V

CH4

BIP10V

CH6

BIP1V

CH7

BIP5V

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 23 24

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Measurement-computing USB-1608FS-Plus Manuale Utente Pagina 11