Measurement Computing USB-202 - Manual (Page 9)

USB-202 User's Guide Functional Details
9
Screw terminals
The screw terminals provide the following connections:
 Eight single-ended analog inputs ( CH0 to CH7 )
 Two analog outputs (
AOUT0 and AOUT1 )
 Eight digital I/O (
DI00 to DI07 )
 External pacer clock input (
AICKI )
 External pacer clock output (
AICKO )
 Digital trigger input (
TRIG )
 Counter input (
CTR )
 User voltage output
(+VO )
 Analog ground reference (
AGND ) and digital ground reference ( GND )
Figure 3. USB-202 pinout
USB connector
The USB connector provides +5 V power and communication. No external power supply is required.
LED indicators
The device has two LED indicators – 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.
Refer to Figure 2 on page 8 for the location of these LEDs.