You can use Telemetry 1 or 2 of pixhawk for connection with XBLink. Telemetry 1 is normally used for Telemetry Radio (like: RFD900...) and Telemetry 2 for XBLink.
Note: Config baudrate of Pixhawk to 57600, SERIAL1_BAUD (Default 57, it means 57600), SERIAL1_PROTOCOL: 2 (MAVLink 2)
Note: For another payload via CSI or HDMI, please conntact us
XBLink supports 7-30V voltage input. You can directly connect 3 ~ 6S (low discharge) battery to power XBLink.
Note: Recommend 3-4 S battery or 12V DC Ubec for high effective and stable performance power supply to XBLink. If you use 6S high discharge battery for drone, you can use Ubec (Output-Voltage: 12 - 16V: minimum 3A) or a separate battery to power the XBLink.
Please check carefully, avoid wrong between Power Port and UART Port (also use for Cooling Fan), both is JST-GH 4 Pin. We are not responsible for this confusion.