Functional Details; External Components; Usb Connector; Screw Terminals - Measurement Computing USB-1808X User Manual

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 (

Refer to Figure 2 and Figure 3 on page 9 for DIFF and SE pinouts.
Two analog outputs (

Four digital I/O lines (

Two general-purpose counter inputs (

Two quadrature encoder inputs (

Two timer outputs (

An external trigger input (

Two external clock inputs (

One +5 V power output (

Ten analog ground (

Use 16 AWG to 30 AWG wire when making connections to the screw terminals.
to
CH0H/CH0L CH7H/CH7L
and )
AOUT0 AOUT1
to )
DIO0 DIO3
and
CTR0
,
ENC0A ENC0B
and )
TMR0 TMR1
and an external trigger output
ITRIG)
and ) and two external clock outputs (
ICLKI OCLKI
) connection
+VO
) and seven digital ground (
AGND
) or eight SE analog inputs (
)
CTR1
, and ,
ENC0Z ENC1A ENC1B
)
OTRIG
) connections
GND
8
Chapter 3
to )
CH0H CH7H
, )
ENC1Z
, )
ICLKO OCLKO