How to Control Analog Speed Dome by Pelco-D/P Protocol

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The pigtails of speed dome (take speed for short in next contents) is
shown in Figure 1-1, it includes three kinds of cables: coaxial cable, power and
485 cable (for control).

Connect power of speed and relative power adapter, as shown in
Figure 1-2.
Note: Red is positive cable and black is negative one in the pigtail of speed
power cable, yellow one represents ground(no need to connect), power of speed
is self-adaptive, so you don’t need to concern the connect order

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