ZKaccess C3-100, Инструкция по установке и эксплуатации

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Instructions for Installation and Use of the C3­100/200/400 Control Panel
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An access control operator panel is powered by +12V DC. Generally, to reduce
power interference between control panels, each control operator panel should be
powered separately. When high reliability is required, control panels and electronic
locks should be powered respectively.
To prevent power failure of a control operator panel from making the whole system
unable to work normally, the access control management system is usually required
to have one UPS at least, and access control locks are powered externally to
guarantee the access control management system can still work normally during
power failure.