IDEC SmartRelay functions
IDEC SmartRelay Manual
120
4.2.7
XOR (exclusive OR)
Symbol in IDEC SmartRelay:
The XOR in a circuit diagram,
shown as series circuit with 2
changeover contacts:
The output status of the XOR is 1 if the inputs are
not equiv-
alent
.
At an unused block input (x): x = 0.
Table of the XOR logic
4.2.8
NOT (Negation, Inverter)
Symbol in IDEC SmartRelay:
A normally closed contact in
the circuit diagram:
The output status is 1 if the input is 0. The NOT block inverts
the input status.
Advantage of the NOT block, for example: The IDEC
SmartRelay does not require normally closed contacts. You
simply use a normally open contact and the NOT block to
convert these into a normally closed contact.
Table of the NOT logic
1
2
Q
0
0
0
0
1
1
1
0
1
1
1
0
1
Q
0
1
1
0
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