Special PSU devices are provided by SYSCOM to power motion recorders (MR) and Network Control Center (NCC). PSU-MR is a power supply for all MR in the network. It is capable of feeding each unit at 24 VDC. PSU-NCC is a power supply unit for the Network Control Center NCC. It is capable of powering the NCC unit, and usually, the computer and display inside the case at 24 VDC. It has an internal backup battery. Both are installed in the case together with the NCC2002.