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UNO-2050 User's Manual
2.4
On-board Isolated Digital Input
The UNO-2050 has 8 isolated digital input channels designated
DI0~DI7.
Pin Assignment
The connector type of UNO-2050 is plug-in screw terminal block that
enables you to connect to field I/O devices directly without additional
accessories. Figure 2-3 and Table 2-2 shows its pin assignment as well
as signal description.
Figure 2-3: Digital input connector pin assignments
Table 2-2: Digital input connector signal description
Isolated Inputs
Each of isolated digital input channels accepts 10 ~ 50 V
DC
voltage
inputs, and accepts bi-directional input. It means that you can apply
positive or negative voltage to an isolated input pin (Vin). All eight
channels share one common pin (COM). Figure 2-4 shows how to
connect an external input source to one of the UNO-2050’s isolated
input channels.
Signal Name
Reference
Direction
Description
DI <0...7>
COM
Input
Isolated digital input signals
COM
-
Input
External common input of DI
D
I
0
D
I
1
D
I
2
D
I
3
C
O
M
D
I
4
D
I
5
D
I
6
D
I
7
Isoated DI