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LOGO! manual
EWA 4NEB 712 6006-02
5.2.2 Previous solution
K1 K2
K2 K1
K3 K3
Open Close
S2 S1
K3
B1 B2 K3
K4
K4
B2
K3
B1
S2
Open door Waiting time
Auxiliary circuit
L1
N
As soon as one of the motion detectors B1 or B2 registers somebody’s pres-
ence, the door is opened by K3.
If the two motion detectors detect nothing for a minimum period, K4 en-
ables the close operation.
5.2.3 Door control system with LOGO!
LOGO! allows you to considerably simplify the circuit. You need only con-
nect the motion detectors, the limit switches and the master contactors to
LOGO!.
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