Manual USB-IIRO-16 Family
7
LED
The LED on the front of the enclosure is used to indicate power and data transmissions. When the LED is in
an illuminated steady green state, this signifies that the board is successfully connected to the computer and
has been detected and configured by the operating system. When the LED flashes continuously, this
signifies that there is data being transmitted over the USB bus.
JUMPER
SELECTED
FILTERS
16
OPTO
ISOLATORS
BUFFERS
16 SPDT
RELAY
OUTPUTS
3
4-
P
IN
IN
P
U
T
C
O
NNE
CT
O
R
5
0-
P
IN
O
U
T
P
UT
CO
N
N
E
C
T
O
R
SCHMITT
TRIGGER
BUFFER
USB 1.1 / 2.0
INTERFACE
W ITH
MICROCONTROLLER
USB
CONNECTOR
Figure 1-1:
Block Diagram
Figure 1-2:
Example of one Input Circuit
