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

External components

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

 Screw terminals

 LED

 USB connector

Screw terminal pins 21 to 40

Screw terminal pins 1 to 20

LED

USB connector

Figure 2. USB-1608FS-Plus components

USB connector

Receives the supplied USB cable. When connected to a computer or USB hub, the cable provides +5 V power

and communication. No external power supply is required.

LED

The LED indicates the communication status; it cannot be disabled.

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

An analog input scan is in progress.

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 power output (PC+5 V)

 11 analog ground (AGND) and eight digital ground (GND) connections

Use 16 AWG to 30 AWG wire when making connections to the screw terminals. Pinout locations are shown in

Figure 3.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 23 24

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