Measurement Computing USB-1608GX-2AO-OEM - Manual (Page 10)

USB-1608GX-2AO-OEM User's Guide Functional Details
10
Board components
Board components are shown in Figure 3. Note that each screw terminal location is unpopulated.
1 Screw terminal (unpopulated) 5 Pull-up/down jumper W1
2 Header connector W4 6 Status LED (top) and Activity LED (bottom)
3 Header connector W6 7 USB connector
4 Screw terminal (unpopulated)
Figure 3. USB-1608GX-2AO-OEM external components
USB connector
The USB connector provides +5 V power and communication. No external power supply is required.
LEDs
The device 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.
Header connectors
The header connectors provide the following connections:
 16 SE (
CH0 to CH15 ) or eight DIFF ( CH0H/CH0L to CH7H/CH7L ) analog input connections
 Eight digital I/O connections (
DIO0 to DIO7 )
 Two analog output connections (
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 )
 13 analog ground (
AGND ) and five digital ground ( GND ) connections
The differential mode pinout is shown on page 11. The single-ended mode pinout is shown on page 12.