Controller

A controller that controls driving of a robot on which a motor is mounted, the controller comprising:

• a housing including a bottom panel, a front panel located on a first side in a first direction along the bottom panel and standing with respect to the bottom panel, and a rear panel located on a second side in the first direction and standing with respect to the bottom panel;
• a power supply circuit board that is disposed in the housing and to which a first voltage is input;
• and
• a control circuit board and a system circuit board that are disposed in the housing and to which a second voltage smaller than the first voltage is input, wherein
• the power supply circuit board and the system circuit board are disposed along the bottom panel and are arranged side by side in the first direction such that the power supply circuit board is located on the second side in the first direction and the system circuit board is located on the first side in the first direction,
• the control circuit board is disposed to overlap with the system circuit board in plan view of the bottom panel,
• the system circuit board has a first connector connected to the robot, and
• the control circuit board has a second connector exposed from the front panel to an outside of the housing and connected to an external device that generates a drive command program for the robot.