In the above-described configuration, the image processing apparatus 10 according to the present embodiment can identify the connection relationship between the power supply portion (which may include the main body power supply portion 18 and the expansion power supply portion 19, etc.) and the loads (which may include each component of the main body 1 and each expansion device 2 etc.). That is, when a certain power supply portion and a certain load are connected to each other, the fluctuation generated in the output power of the certain power supply portion and the fluctuation generated in the power supplied to the certain load have a correlative relationship. Therefore, the connection relationship between the power supply portion and the loads can be identified based on the above-described correlative relationship. In addition, since the connection identifying portion 32 uses the fluctuation of the output power from the power supply portion to the loads in order to identify the connection relationship, it is not necessary to add terminals or the like for connection detection in order to identify the connection relationship. Thus, the connection relationship can be identified with a simple configuration. With the identified connection relationship, suitability of a work for which a user connects the power supply portion and the loads (including the expansion devices 2) can be determined. As described above, in the image processing apparatus 10 according to the present embodiment, there is an advantage in which the appropriate connection relationship between the power supply portion and the loads can be realized.

(2) Configuration for Identifying a Connection Relationship