« Different power ranges to choose according to the needs of the KNX installation, as well as the option of a backup unit with auxiliary power input . . . » power supplies BFK80 PS110800 KNX power supply 80mA BFK160 PS111600 KNX power supply 160mA BFK320 PS113200 KNX power supply 320mA BFK640 PS116400 KNX power supply 640mA BFK640-BU PS116410 KNX backup power supply 640mA BFK-VIIP new PS111000 VIIP KNX power supply