The SCALANCE PS924 and SCALANCE PS9230 power supplies are ideal for use with expansion module PE408PoE from the SCALANCE XM-400 product series. Two PS-900 power supplies can be connected for each PE408PoE. A PS-900 power supply provides 86 W and can therefore supply up to 4 ports on the PE408PoE. A maximum of 30 W are available at any one port.