Master controller, servo actuator and servo controlling system

A servo actuator, comprising:

• a servo micro control unit (MCU);
• a first interface coupled to the servo MCU via a bus;
• a second interface coupled to the first interface and the servo MCU via the bus;
• a first servo switch connected between the first interface and the servo MCU to turn on or off the first interface;
• a second servo switch connected between the second interface and the servo MCU to turn on or off the second interface;
• a first connection line connected between the first interface and the servo MCU;
• and
• a second connection line connected between the second interface and the servo MCU.

A servo actuator controlling system, comprising:

• a master controller comprising:
• a master MCU and a plurality of interfaces connected to the master MCU via a first bus;
• and
• a plurality of servo actuators coupled to at least one interface of the master controller, each of the plurality of servo actuators comprising:
• a servo MCU;
• a first interface coupled to the servo MCU via a second bus;
• a second interface coupled to the first interface and the servo MCU via the second bus;
• a first servo switch connected between the first interface and the servo MCU to turn on or off the first interface;
• a second servo switch connected between the second interface and the servo MCU to turn on or off the second interface;
• a first connection line connected between the first interface and the servo MCU;
• and
• a second connection line connected between the second interface and the servo MCU.