under where it says 'Type Selection, 1 Pole' underneath the word pole 'Control Voltage', third one down 24-230v ac/dc +/- 15%
and apologies for not clarifying the control voltage, bham is correct, I (wrongly) assumed 230vac
Also, under tha section it gives you the part numbers - you quoted RN 1A48A50 which is the 24-230 control voltage one.