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2
Installation Preparation
Safety Precautions
Installation and removal of the unit and its accessories must be carried out by qualified personnel. You
must read all of the Safety Instructions supplied with your device before installation and operation.
Installation und Ausbau der Anlage und ihrer Zubehörteile müssen von qualifiziertem Personal realisiert
werden. Sie müssen vor der Installation oder Bedienung allen beiliegenden Sicherheitshinweise lesen.
负责安装和日常维护本设备的人员必须具备安全操作基本技能。在操作本设备前，请务必认真阅读和执
行产品手册规定的安全规范。
To avoid any device impairment and bodily injury caused by improper use, observe these rules:
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Pull the power plug(s) out of the access controller before cleaning it. Do not clean the access
controller using wet cloth or liquid.
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Keep the access controller away from water or dampness. Prevent water or moisture from entering
the chassis of the access controller.
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Do not place the access controller on an unstable case or desk. The access controller might be
damaged severely in case of a fall.
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Ensure proper ventilation of the equipment room and keep the ventilation vents of the access
controller free of obstruction.
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Make sure that the operating voltage is the same one labeled on the access controller.
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Do not open the chassis when the access controller is operating or when electrical hazards are
present to avoid electrical shocks.
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When replacing interface modules, wear the ESD-preventive wrist strap to avoid damaging the
interface modules.
