Usb Connector - Measurement Computing USB-1208HS-4AO User Manual

USB-1208HS-4AO User's Guide

USB connector

The USB connector provides +5 V power and communication. No external power supply is required.
Activity LED
The Activity LED indicates the communication status of the USB-1208HS-4AO. It flashes when data is
transferred, and is off when the USB-1208HS-4AO is not communicating. This LED uses up to 10 mA of
current and cannot be disabled.
Status LED
The Status LED lights up when the USB-1208HS-4AO is detected and installed on your computer.
Screw terminals
The USB-1208HS-4AO module's screw terminals provide the following connections:

Eight analog input connections (

16 digital I/O connections (

Four analog output connections (

10 analog ground connections (

Six digital ground connections (

One external clock input (

One external clock input (

One digital trigger input (

Two counter inputs (

One timer output (

Two 5 V power output connections (
Use 16 AWG to 30 AWG for signal connections. The screw terminal signals are shown in Figure 3.
to
AIN0 AIN7
DI00 to DI015 )
to
AOUT0 AOUT3
)
AGND
)
GND
AICKI ) and one external clock output (
) and one external clock output (
AOCKI
)
TRIG
CTR0 , CTR1 )
)
TMR
)
+5 V
Figure 3. USB-1208HS-4AO screw terminal signals
)
)
AICKO
AOCKO
12
Functional Details
) for analog inputs
for analog outputs