18 Installation
Standard 24 V DC DI
Potential free contacts and two wire pressure switches, proximity switches and similar are
powered from the +C (4) terminal which supplies +24V DC.
This type of input is used for reading off floating (potential free) contacts and are active
high.
The external contact’s one end is connected to the input and the other to +C. The +C
output is current limited and short circuit proof.
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