Eaton moeller easy721 dc tc 24v dc din rail mount control relay module eaton 274121 p the eaton moeller easy721 dc tc is a 24v dc intelligent din rail mountable control relay module which combine timers relays counters special functions inputs and outputs into one compact device that is easily programmed the easy721 provides an exception level of flexibility together with substantial savings of commissioning time and effort the module is used for controlling medium sized applications w