USB-1608GX User's Guide
Functional Details
9
External components
The USB-1608GX has the following external components (see Figure 3):
USB connector
LEDs
Screw terminals
1 Screw terminal pins 1 to 27
4 Activity LED
2 Screw terminal pins 28 to 54 5 USB connector
3 Status LED
Figure 3. External components
USB connector
The USB connector pr5 V power and communication. No external power supply is required.
LEDs
The USB-1608GX has two LEDs –
Status
and
Activity
.
The
Status
LED turns on when the device is detected and installed on the computer.
The
Activity
LED blinks when data is transferred, and is off otherwise.
Figure 3 shows the location of each LED.
Screw terminals
The screw terminals provide the following connections:
16 SE (
CH0
to
CH15
) or eight DIFF (
CH0H/CH0L
to
CH7H/CH7L
) analog inputs
Eight digital I/O bits (
DIO0
to
DIO7
)
One external clock input (
AICKI
) and one external clock output (
AICKO
) for analog inputs
One digital trigger input (
TRIG
)
Two counter inputs (
CTR0
,
CTR1
)
One timer output (
TMR
)
One power output (
+5V
)
Analog ground (
AGND
) and digital ground (
GND
) connections
The single-ended mode pinout is shown in Figure 4, and the differential mode pinout is shown in Figure 5.
