PRO AIR TPK 21 - Setting the Relay Switching Characteristics

9.2 Setting the Relay Switching Characteristics
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After selecting the desired output value, you can define the switching characteristics of the
relay.
NC/NO" sets the desired switching characteristics for Relay 1.
This parameter determines whether relay can be open or closed in its initial state.
You may chose between the following switching characteristics:
Normaly closed
Normaly open
Always closed
Always open
Select the "NC/NO" field (the field will be highlighted) and go to the desired value in the list
that appears.
Confirm your choice with .
Source
NC / NO
Upper Limit
Lower Limit