FUNCTION CHARACTERISTICS
23
NA016 - Manual - 05 - 2022
Binary inputs
Three binary inputs are available.
The dry inputs must be powered with an external voltage, (usually the auxiliary power supply).
The connections are shown in the schematic diagrams.
Every input is customized for a defined function.
FUNCTION
Binary input
IN1 IN2 IN3
52a (auxiliary CB contact)
52b (auxiliary CB contact)
TCS (Trip Circuit Supervision)
TCS
Trip Circuit Supervision.
Supervision with one binary input may be performed.
The exhaustive treatment of the TCS function is described in the concerning paragraph.
52a and 52b
The CB position can be acquired by means of binary inputs connected to the auxiliary contacts: the
information is used to acquire the CB position (open-closed-fault).
TRIP
R
+UAUX
-UAUX
52a 52b
52
NA016
Binary input IN3
Towards 74TCS logic
Trip Circuit Supervision - 74TCS
CB position
CB diagnostic
52a
52
52b
+UAUX
-UAUX
IN2
IN1
Binary input allocation for CB state acquisition
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