10
Chapter 3
Functional Details
External components
The USB-2416 components are shown in Figure 4.
Figure 4. USB-2416 components
1 Screw terminals (removable) for analog/TC
input and counter inputs
4
External power connector
2 Power (top) and Activity (bottom) LEDs
5
Screw terminals (removable) for
analog/TC input and counter input
3 USB connector
6
37-pin DSUB expansion connector
(connects to AI-EXP32)
Screw terminals
The USB-2416 has six groups of screw terminals—three on each side of the enclosure – that provide the
following connections:
16 analog/TC inputs (
CH0H/CH0L
to
CH15H/CH15L
)
Eight digital I/O (
DIO0
to
DIO7
)
Two event counter inputs (
CTR0, CTR1
)
One power output (
+VO
)
Nine analog grounds (
GND
)
Two digital grounds (
DGND
)
Use 16 AWG to 30 AWG wire when making connections to the screw terminals. Connectors are identified in
Figure 5 through Figure 7 on pages 11-13.
