Measurement-computing USB-1608FS Instrukcja Użytkownika Pobierz pdf (Strona 10)

USB-1608FS User's Guide

External components

The external components – screw terminal banks, LED, and USB connector –are shown in Figure 2.

1 Screw terminal pins 21 to 40 3 Screw terminal pins 1 to 20

2 LED 4 USB connector

Figure 2. USB-1608FS components

USB connector

The USB connector provides +5 V power and communication. No external power supply is required.

LED

The LED indicates the communication status; it cannot be disabled. LED states are listed in the table below.

LED behavior

LED state Indication

On – steady green The device is connected to a computer or external USB hub.

Blinks once A USB command is received.

Blinks continuously Data is being transferred.

Blinks three times Initial communication is established between the USB-1608FS and the computer.

Blinks at a slow rate The analog input is configured for external trigger. The LED stops blinking and illuminates

steady green when the trigger is received.

Screw terminals

The screw terminals provide the following connections:

 Eight analog inputs (

CH0 IN to CH7 IN)

 Eight digital I/O lines(

DIO0 to DIO7)

 One external event counter input (

CTR)

 One SYNC I/O terminal for external clocking and multi-unit synchronization (

SYNC)

 One external trigger input (

TRIG_IN)

 One calibration output (

CAL)

 One power output (

PC +5 V)

 analog ground (

AGND) and digital ground (GND) connections

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 25 26

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Measurement-computing USB-1608FS Instrukcja Użytkownika Strona 10