Publication PSS-SG001A-EN-P – June 200512 IsysnetTypical ConfigurationsPower Distribution OptionsIsysnet Communication Adapter and I/O ModulesAn auxiliary 24VDC power supply provides power to the PointBus backplane and I/O modules. You can connect up to 13 I/Omodules and an adapter with a maximum of 10 A field power, using the auxiliary power.Isysnet System with 24VDC Expansion Power Unit (PSSSE24A)The auxiliary power supports up to 13 I/O modules and an adapter with a maximum of 10 A field power. The 24VDC expansionpower unit (PSSSE24A) extends the backplane bus power to support up to 13 more I/O modules. Connect additional expansionpower units to expand the I/O assembly up to the maximum of 63 I/O modules.24V PowerSupply24V PowerSupply24V PowerSupplyPSSSE24A