MCC USB-1808X: High-Speed, High-Precision, Simultaneous USB DAQ Device - User Guide

8
Chapter 3
Functional Details
External components
The USB-1808X has the following external components (see Figure 2 through Figure 4 on pgs. 9-10):
 USB connector
 LEDs
 Screw terminals
USB connector
The USB connector provides +5 V power and communication. No external power supply is required.
Screw terminals
The screw terminals provide the following connections:
 Eight DIFF analog inputs (
CH0H/CH0L to CH7H/CH7L) or eight SE analog inputs (CH0H to CH7H)
Refer to Figure 2 and Figure 3 on page 9 for DIFF and SE pinouts.
 Two analog outputs (
AOUT0 and AOUT1)
 Four digital I/O lines (
DIO0 to DIO3)
 Two general-purpose counter inputs (
CTR0 and CTR1)
 Two quadrature encoder inputs (
ENC0A, ENC0B, ENC0Z and ENC1A, ENC1B, ENC1Z)
 Two timer outputs (
TMR0 and TMR1)
 An external trigger input (
ITRIG) and an external trigger output OTRIG)
 Two external clock inputs (
ICLKI and OCLKI) and two external clock outputs (ICLKO, OCLKO)
 One +5 V power output (
+VO) connection
 Ten analog ground (
AGND) and seven digital ground (GND) connections
Use 16 AWG to 30 AWG wire when making connections to the screw terminals.