Dahua ASC2102B-T Manuel de l'utilisateur - Page 3
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Overview
This document elaborates on structure, installation, interface and wiring of two-door slave
access controller.
Symbol Definition
The following symbols may appear in this document. And their meanings are as follows:
Symbol
Note
It indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
It indicates a moderate or low level of potential danger which, if not
avoided, could result in minor or moderate injury.
It indicates a potential risk that, if ignored, could result in damage to
device, loss of data, degraded performance, or unpredictable results.
It means electrostatic-sensitive device.
It means high-voltage danger.
It means intensive laser radiation.
It means that it can help you to solve some problems or save your time.
It means the additional information, which is to emphasis or
supplement.
Preface
II