Robot system and robot

A robot system comprising:

• a robot;
• a controller that controls actuation of the robot;
• a first external device;
• a second external device, and
• a second device connecting part connected to the second external device,
• wherein
• the robot has
• a first member,
• a second member that pivots relative to the first member,
• a motor that generates drive power for pivoting the second member relative to the first member,
• an encoder including a detection unit that detects an amount of rotation of the motor, a control unit that controls actuation of the detection unit, a communication unit that communicates with the controller, and a first device connecting part connected to the first external device, the control unit connected to the detection unit, the communication unit, and the first device connecting part, and
• a first communication line connecting the communication unit and the controller,
• wherein data of the first external device is transmitted to the controller via the first device connecting part and the first communication line,
• the encoder, the first external device, and the second external device are connected by wiring, and
• the second device connecting part is provided in the first external device.