Configuration comprising a load apparatus and an apparatus for preventing a short circuit comprising: an input/output terminal unit configured to be electrically connected, via a second external power line, to the load apparatus that is electrically connectable to one of a driving voltage supply (Vo) and a ground via a first external power line; an internal power line configured to electrically connect one of the driving voltage supply (Vo) and the ground to the input/output terminal unit; a switching unit configured to be mounted on the internal power line, the switching unit having one end electrically connected to the input/output terminal unit and configured to energize or block the internal power line; a variable resistor unit configured to be mounted on the internal power line and configured to be electrically connected to the other end of the switching unit; and characterized by a control unit configured to determine whether the input/output terminal unit is shorted based on a measurement current value of a current flowing through the internal power line and control a set resistance value of the variable resistor unit in accordance with a result of the determination whether the input/output terminal unit is shorted, wherein, when the measurement current value exceeds a preset reference current value, the control unit determines that the input/output terminal unit is shorted, and wherein, when the input/output terminal unit is determined to be shorted as a result of the determination whether the input/output terminal unit is shorted, the control unit controls a set resistance value of the variable resistor unit to be a preset reference resistance value. an input/output terminal unit configured to be electrically connected, via a second external power line, to the load apparatus that is electrically connectable to one of a driving voltage supply (Vo) and a ground via a first external power line; an internal power line configured to electrically connect one of the driving voltage supply (Vo) and the ground to the input/output terminal unit; a switching unit configured to be mounted on the internal power line, the switching unit having one end electrically connected to the input/output terminal unit and configured to energize or block the internal power line; a variable resistor unit configured to be mounted on the internal power line and configured to be electrically connected to the other end of the switching unit; and characterized by a control unit configured to determine whether the input/output terminal unit is shorted based on a measurement current value of a current flowing through the internal power line and control a set resistance value of the variable resistor unit in accordance with a result of the determination whether the input/output terminal unit is shorted, wherein, when the measurement current value exceeds a preset reference current value, the control unit determines that the input/output terminal unit is shorted, and wherein, when the input/output terminal unit is determined to be shorted as a result of the determination whether the input/output terminal unit is shorted, the control unit controls a set resistance value of the variable resistor unit to be a preset reference resistance value.