Applications
263
IDEC SmartRelay Manual
8.2 Automatic door
You often find automatic door control systems at the en-
trance to supermarkets, public buildings, banks, hospitals
etc.
8.2.1 Requirements of an automatic door
• When a person approaches the door, it must open auto-
matically.
• The door must remain open until the doorway is cleared.
• When the doorway is cleared, the door must close auto-
matically 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.
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com
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