HIKVISION DS-K3G201 - 2.1.3 Turnstile installation hole diagram; Chapter 3 General Wiring

DS-K3G201 Series Tripod Turnstile User Manual
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The size of the expansion screw should be M12. The length of the expansion screw should not
be less than 120mm. It is recommended to use the expansion screw with a length of 120mm.