IDEC FL1E SmartRelay - Manual (Page 283)

Applications
IDEC SmartRelay Manual 269
8.2 Automatic door
You often find automatic door control systems at the
entrance to supermarkets, public buildings, banks, hospitals
etc.
8.2.1 Requirements of an automatic door
• When a person approaches the door, it must open
automatically.
• The door must remain open until the doorway is cleared.
• When the doorway is cleared, the door must close
automatically with a short delay.
B1
B2 Q1
S1 S2
Outside
inside
Motion detector
Limit switch 
closed
Limit switch 
open
Motion detector
Master switch
Motion detector
Master switch
The door is usually driven by a motor that is equipped with a
slip coupling. This prevents people from being squeezed in
and injured. The control system is connected to the mains
via a master switch.