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Chapter 2
2.5 Onboard Isolated Digital Output
The UNO-2050E has 8 isolated digital output channels designated
DO0~DO7.
Pin Assignment
The connector type of UNO-2050E is plug-in screw terminal block that
enables you to connect to field I/O devices directly without additional
accessories. Figure 2-5 and Table 2-7 shows its pin assignment as well as
signal description.
Figure 2.5: Digital Output Connector Pin Assigns
Power On Configuration
Default configuration after power on or hardware reset is to set all the iso-
lated digital output channels to open status (the current of the load can’t
be sink) so that users need not worry about damaging external devices
during system startup or reset.
When the system is hot reset, then the status of isolated digital output
channels are selected by jumper JP12. Table 2-8 shows the configuration
of jumper JP12.
Table 2.7: Digital Output Signal Description
Signal Name
Reference
Direction
Description
DO <0...7>
GND
Output
I
solated digital out-
put signals
COM
-
Input
External common
output of DO
GND
-
-
Isolated ground
G
N
D
D
0
0
D
0
1
D
0
2
D
0
3
D
0
4
D
0
5
D
0
6
D
0
7
C
O
M
Isoated DO
