Some embodiments are directed to a surgical robotic system including a suspension structure 1, a carriage 2 arranged to be mounted to the suspension structure, and a manipulator arm 3 arranged to be detachably docked to the carriage via a docking mechanism. The docking mechanism includes a first docking connector on the manipulator arm and a second docking connector on the carriage. The first and the second docking connector may establish an electrical connection between the manipulator arm and the carriage when the manipulator arm is docked. The manipulator arm includes a connector for connecting the manipulator arm via a cable to an electric power supply, and be configured to supply the carriage with the electrical power via the electrical connection when the manipulator arm is docked.
