Printer

A printer comprising:

• a main apparatus;
• a device including a drive unit configured to operate by being supplied with electric power from the main apparatus;
• and
• a connection member to connect the main apparatus to the device, wherein
• the main apparatus includes:
• a first power source provided to supply electric power to the device;
• and
• a first output port from which the electric power from the first power source is outputted to an outside of the main apparatus,
• the device includes:
• a first input port from which the electric power from the first power source is inputted to the device;
• a protection element with a first end side connected to the first input port;
• a second output port connected to a second end side of the protection element, and provided to output electric power from the protection element to an outside of the device;
• and
• a second input port provided to the drive unit, and the connection member includes:
• a first connecting path provided to connect the first output port to the first input port;
• and
• a second connecting path provided to connect the second output port to the second input port such that the output from the second output port is provided to the second input port therethrough.