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UPS for 400 Vac Grid, User Guide, doc. rev. 4
8.2.9.1.2.
Using the input dry contacts
The connection for each input dry contact consists of two pins – one independent pin (“digital
input #x”), and the second pin, labeled Common).
In the Setup > Dry contacts > Input dry contacts screen the user defines the dry contact as
normally open or normally closed, depending on the normal state of the external circuit. The user
must also ensure that the input dry contact is enabled, by selecting the "Enabled" box for that dry
contact in the same screen (see Figure 85).
An alarm has been pre-assigned to each of the input dry contacts. (You can see these alarms in
the Setup > Alarms function. They are named: "Auxiliary #1 fault" through " Auxiliary #5 fault".
These names can be modified by the user.) Provided that the input dry contact is enabled, when it
changes from its defined normal state the associated alarm condition is generated. Depending on
the severity level associated with the alarm (in the Setup > Alarms function), the alarm generates
an entry in the system log and may light up the alarm LED and sound the audible alarm.
Figure 85: Defining an input dry contact
