Measurement Computing USB-1608FS-Plus - Manual (Page 10)

USB-1608FS-Plus User's Guide Functional Details
10
External components
The external components – screw terminal banks, LED, and USB connector –are shown in Figure 2.
 Screw terminals
 LED
 USB connector
1 Screw terminal pins 21 to 40 3 Screw terminal pins 1 to 20
2 LED 4 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.