Measurement-computing E-1608-OEM Manuel d'utilisateur télécharger pdf (Page 16)

E-1608-OEM User's Guide Functional Details

Ethernet to the same local network. Typical throughput is not guaranteed if a wireless connection is involved or

data is sent over the Internet.

External clock I/O

The E-1608-OEM provides one external clock input (AICKI) and one clock output (AICKO) for analog inputs.

 You can connect an external clock signal to AICKI.

 When using the internal clock, AICKO outputs the ADC 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 connectors can detect the state of any TTL-level input and offer

. advanced BiCMOS output.

Refer to the schematic shown in Figure 4.

Figure 4. 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).

Pull-up/down configuration

Unconnected inputs are pulled high by default to 5 V through 47 kΩ resistors via jumper W3 on the circuit

board (see Figure 5).

W3 pull-up/pull-down jumper

Figure 5. W3 jumper location

The pull-up/pull-down voltage is common to all 47 kΩ resistors. Jumper W3 is configured by default for pull-

up. Figure 6 shows the jumper configured for pull-up and pull-down.

Caution! The discharge of static electricity can damage some electronic components. Before touching the

board, ground yourself using a wrist strap or touch the computer chassis or other grounded object

to eliminate any stored static charge.

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Measurement-computing E-1608-OEM Manuel d'utilisateur Page 16