When someone enters the detection range of one of the
motion sensors B1 or B2, the door opening motion is initiated
by setting K3.
After the detection range of the two motion sensors has been
cleared at leas
t for a minimum time, K4 enables the closing
motion.
8.2.3 Door control system with IDEC SmartRelay
IDEC SmartRelay can simplify this circuit considerably. You
only need to connect the motion sensors, limit switches and
the contactor relays to the IDEC SmartRelay.
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