IDEC SmartRelay functions
119
IDEC SmartRelay Manual
4.2.6
NOR (not OR)
Symbol in IDEC SmartRelay:
Circuit diagram of a series circuit with
several normally closed contacts:
The output status of the NOR is only 1 if
all
inputs are 0, i.e.
if switched off. The NOR output is set to 0 when one of the
inputs is switched on (logical 1 status).
At an unused block input (x): x = 0.
Table of the NOR logic
1
2
3
4
Q
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
0
1
1
0
0
1
0
0
0
0
1
0
1
0
0
1
1
0
0
0
1
1
1
0
1
0
0
0
0
1
0
0
1
0
1
0
1
0
0
1
0
1
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
0
0
1
1
1
1
0
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