External Components; Usb Connector; Led; Screw Terminals - Measurement Computing usb1608fs User Manual

USB-1608FS User's Guide

External components

The external components – screw terminal banks, LED, and USB connector –are shown in Figure 2.
1
2

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 state
On – steady green
Blinks once
Blinks continuously
Blinks three times
Blinks at a slow rate

Screw terminals

The screw terminals provide the following connections:

Eight analog inputs (

Eight digital I/O lines(

One external event counter input (

One SYNC I/O terminal for external clocking and multi-unit synchronization (

One external trigger input (

One calibration output (

One power output (

analog ground (
AGND
Screw terminal pins 21 to 40
LED
Figure 2. USB-1608FS components
LED behavior
Indication
The device is connected to a computer or external USB hub.
A USB command is received.
Data is being transferred.
Initial communication is established between the USB-1608FS and the computer.
The analog input is configured for external trigger. The LED stops blinking and illuminates
steady green when the trigger is received.
to )
CH0 IN CH7 IN
to )
DIO0 DIO7
CTR )
TRIG_IN )
)
CAL
)
PC +5 V
) and digital ground (
GND
3 Screw terminal pins 1 to 20
4 USB connector
) connections
10
SYNC )