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IDEC SmartRelay functions
IDEC SmartRelay Manual
116
4.2.3
NAND (not AND)
Symbol in IDEC SmartRelay:
Parallel circuit with multiple normally
closed contacts in the circuit diagram:
The output of the NAND is only 0 if the status at
all
inputs is
1, i.e. the contacts are closed.
At an unused block input (x): x = 1.
Table of the NAND logic
1
2
3
4
Q
0
0
0
0
1
0
0
0
1
1
0
0
1
0
1
0
0
1
1
1
0
1
0
0
1
0
1
0
1
1
0
1
1
0
1
0
1
1
1
1
1
0
0
0
1
1
0
0
1
1
1
0
1
0
1
1
0
1
1
1
1
1
0
0
1
1
1
0
1
1
1
1
1
0
1
1
1
1
1
0
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