Measurement Computing USB-1608GX-2AO - Manual (Page 9)

USB-1608GX-2AO User's Guide Functional Details
9
External components
The USB-1608GX-2AO 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 provides +5 V power and communication. No external power supply is required.
LEDs
The USB-1608GX-2AO 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 )
 Two analog outputs (
AOUT0 , AOUT1 )
 One external clock input (
AICKI ) and one external clock output ( AICKO ) for analog inputs
 One external clock input (
AOCKI ) and one external clock output ( AOCKO ) for analog outputs
 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.