Measurement-computing USB-1608GX-2AO Instrukcja Użytkownika Pobierz pdf (Strona 12)

USB-1608GX-2AO User's Guide Functional Details

An example of a 4-element list is shown in the table below.

Sample channel-gain queue list

Element

Channel

Range

Mode

CH5

BIP5V

CH1

BIP10V

DIFF

CH15

BIP1V

CH5

BIP5V

Carefully match the gain to the expected voltage range on the associated channel or an over range condition

may occur. Although this condition does not damage the device, it does produce a useless full-scale reading,

and can introduce a long recovery time due to saturation of the input channel.

For more information about analog signal connections

For more information about analog input connections, refer to the Guide to DAQ Signal Connections (available

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

Analog output

The two 16-bit analog outputs (AOUT0 and AOUT1) can be updated simultaneously at a rate of 250 kS/s per

channel. One output can be updated at a rate of 500 kS/s. The output range is fixed at ±10 V. The outputs

default to 0 V when the host computer is shut down or suspended, or when a reset command is issued to the

device.

External clock I/O

The device has one external clock input (AICKI) and one external clock output (AICKO) for analog inputs, and

one external clock input (AOCKI) and one external clock output (AOCKO) for analog outputs.

 You can connect an external clock signal to AICKI and/or AOCKI.

When using an external clock, AICKO outputs the pulse generated from AICKI, and AOCKO pin outputs the

pulse generated from AOCKI.

 When using the internal clock, AICKO outputs the ADC scan clock, and AOCKO outputs the DAC scan

clock.

Digital I/O

You can connect up to eight digital I/O lines to DIO0 through DIO7. Each digital channel is individually

configurable for input or output. The digital I/O terminals can detect the state of any TTL-level input. Refer to

the schematic shown in Figure 7.

Figure 7. Schematic showing switch detection by digital channel DIO0

If you set the switch to the +5 V input, DIO0 reads TRUE (1). If you move the switch to GND, DIO0 reads

FALSE (0).

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