Applications
226
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.
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.
B1
B2
Q1
S1 S2
Outside
inside
Motion detector
Limit switch
closed
Limit switch
open
Motion detector
Master switch
Motion detector
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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