Patent ID: 8678541

Claim:
A printing device to which a printing material container can be attached and that receives a printing material from the printing material container and performs printing, the printing material container having two first terminals, two second terminals, an electric device connected between the two first terminals, and a wiring connecting the second terminals to each other, the printing device comprising: first and second detection terminals that contact the two first terminals when the printing material container is attached to the printing device; third and fourth detection terminals that contact the two second terminals when the printing material container is attached to the printing device; a first detection signal generator that outputs a first detection signal to the first detection terminal; a first detector that is connected to the second detection terminal; a second detection signal generator that outputs, to the third detection terminal, a second detection signal that is different from the first detection signal; a second detector that is connected to the fourth detection terminal; a high voltage generator that outputs, to at least one of the first and second detection terminals, a high voltage that is higher than voltages of the first and second detection signals; an overvoltage detector that detects whether or not the high voltage has been output to at least one of the third and fourth detection terminals; and a voltage drop element that is arranged between the third or fourth detection terminal and the overvoltage detector.