Network interface that converts the physical media of the FlexZone network into a standard computer interface (USB, ETHERNET, EIA-232). Allows FlexZone processors to communicate alarm, status and configuration information. The input power for the DF955-U is 12 to 48VDC, the consumption is 3W. PSU-3.5A compatible power supply or if you have the DF648 you can also use it.