That one you are using 
Toggle Switch = “EIN/AUS Schalter”, Momentary Switch = “Taster”
Here is a working config for a FGS223 (with two relays):
items:
Group:Number:SUM gEnergyW <energy> //group power consumption
Group:Number:SUM gEnergyKW <energy> //group energy consumption
Number FibFGS223_1_kwh1 "Wallplugs WZ [%.2f KWh]" <energy> (gEnergyKW) { channel="zwave:device:uzb:node30:meter_kwh1" }
Number FibFGS223_1_kwh2 "Wallplugs EZ [%.2f KWh]" <energy> (gEnergyKW) { channel="zwave:device:uzb:node30:meter_kwh2" }
Number FibFGS223_1_watt1 "Wallplugs WZ [%.2f W]" <energy> (gEnergyW) { channel="zwave:device:uzb:node30:meter_watts1" }
Number FibFGS223_1_watt2 "Wallplugs EZ [%.2f W]" <energy> (gEnergyW) { channel="zwave:device:uzb:node30:meter_watts2" }
Switch FibFGS223_1_Sw_1 (gRestore) { channel="zwave:device:uzb:node30:switch_binary1" }
Switch FibFGS223_1_Sw_2 (gRestore) { channel="zwave:device:uzb:node30:switch_binary2" }
sitemap:
Switch item=FibFGS223_1_Sw_1 label="Living Wallplugs"
Switch item=FibFGS223_1_Sw_2 label="Dining Wallplugs"
Group item=gEnergyW label="Momentanverbrauch [%.1f W]" icon="energy"
Group item=gEnergyKW label="Gesamtverbrauch [%.2f KWh]" icon="energy"