1
2
3
4
1
2
3
4
4-position Product marking Direction Description
No. 1
+DC1
Input
Supply voltage input DC1
No. 2
+DC2
Input
Supply voltage input DC2
No. 3
-COM
Input
Common
No. 4
-COM
Input
Common
4-position Product marking Direction Description
No. 1
Output
Alarm relay (status) contact
No. 2
Status –
Output
Alarm relay (status) contact
No. 3
Digital In +
Input
Digital in +
No. 4
Digital In –
Input
Digital in –
3BSE083159
17
Section 2 Interface specifications
Figure 5. Power Connections
I/O Connection
The Status output is a potential free, opto-isolated normally closed solid-state relay.
This can be configured to monitor various alarm events within the NE870 unit, see
ABB NEOS User Manual
. An external load in series with an external voltage source
is required for proper functionality. For voltage/current ratings, see “Section 2
Interface specifications” section.
Figure 6. I/O Connection
Summary of Contents for NE870
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