Introduction and differences of cloud platform and RS485

Cloud Platform]

Pan & tilt & zoom, or PTZ. The cloud platform is an installation platform composed of two AC motors. It can perform horizontal and vertical movements around the central spindle, and install the camera on it to realize multiple degrees of freedom motion of the camera, quick positioning of fixed monitoring targets or panoramic observation of a wide range of monitoring environments. Currently, some cloud platforms also provide functions such as aperture, focus, zoom, wiper, heating, and infrared switch.

In security monitoring, PTZ is short for PAN/Tilt/zoom, which represents the full range of Cloud Platform (up and down, left and right) movement, camera doubling, zoom control. The PTZ is controlled by common monitoring, and multi-core connections are generally used. The controller controls the connection power supply of the cloud platform and the lens in all directions with switch contacts to achieve the goal of moving the cloud platform and doubling the lens. At present, the digital DVR controls the cloud platform and lens mostly through RS485 communication, which can be achieved only by second-line (or two-core with screen wires.

[RS485]

RS-485 Control adoptedBalanced TransmissionAndDifferential receiving,RS-485UseHalf Duplex ModeAt any time, only one node can be in the sending status, so it has the ability to suppress common mode interference. In addition, the bus transceiver has a high sensitivity and can detect voltage as low as 200mV, therefore, the transmission signal can be recovered from kilometers away. RS-485 for Multi-Point interconnection is very convenient, can save a lot of signal lines. Application RS-485, can be networked to form a distributed system.

[Differences between RS485 and PTZ]

General players,Cloud PlatformAll adoptRS485 serial communication mode, SuchPelco's. Ad uses the man-code.
WhilePTZGenerallyControllable camera equipment (Line Control), Including Up, down, left and right movement, focal length, aperture, change times, etc.