Dahua DH-SD1A, Руководство по установке

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The wall shall sustain at least 8X weight of the speed dome, bracket and other accessories.
4.3 Installation Steps
Step 1
Pull the device cable through the ceiling changeover plate, which is shown in Figure 4-3.
Figure 4-3
Step 2
Place the device cable closely into the wiring channel and use screws to install changeover plate
of speed dome on the ceiling changeover plate, which is shown in Figure 4-4.