relay qn1 8f 8b non ac immune plug in type style qn1dc neutral line50v dc 8f 8b contacts front and back contacl metel to carbon complite with plug board retaing clip and connectors confirning to brs 9 30 irs s 34 and irs s 23 the interlockin code for this unit shall be abdef warranty period 30 months aft er the date of delivery