ABB NE870 User Manual page 18

The Digital In is an opto-isolated digital input which can be used to monitor
external events. For voltage/current ratings, see
section.
Figure 7. I/O Schema
18
Section 2 Interface specifications
"Section 2 Interface
External
Load
1
2
3
v
4
specifications"
v
Status
+
Digital In
-
3BSE083159