A device which is subject to management by the management unit comprises a storage region for storing device status information, which is information indicating a status relating to the device, and control sections for sending the device status information stored in this storage region to the management unit. The jumper has connectors on each end for connecting to the two components. Ion-conducting species are grafted into the pores via reactions with surface groups of the inorganic framework to allow for ion transport through the pore network. The box can be used as a plug box for a refrigeration unit.