D3 Series User Manual
Page | 49 Copyright©2023 ZKTECO CO., LTD. All rights reserved.
Door Sensor Type
There are three Sensor types: None, Normal Open, and Normal Closed.
None: It means the door sensor is not in use.
Normally Open: It means the door is always left open when electric power is
on.
Normally Closed: It means the door is always left closed when electric power is
on.
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