What type of connection does the power cable for the Sapphire Site Controller use?

The power cable for the Sapphire Site Controller uses a serial connection. This type of connection involves sending data one bit at a time over a single channel, which is well-suited for power supply purposes due to its simplicity and effectiveness in communication between devices. Serial connections are often used in situations where the distance between the controller and its power source is significant, allowing for reliable data transmission without the interference that can occur with other types of connections.

While parallel connections can transmit multiple bits simultaneously, they are typically not used for powering devices because of the complexity and potential issues with signal integrity over longer distances. USB connections provide power and data transfer but are not the primary method for a power supply in this context. HDMI is primarily a video and audio interface and is not relevant for powering devices. The choice of a serial connection thus reflects the specific requirements and operational context of the Sapphire Site Controller.