The cooling controller ST710-KNKVR.112 has an interface for ST-Bus. The controller has two sensor inputs for PTC sensors and is supplied with 12-24V AC.The functions of the two inputs and four switching relays can be freely selected, whereas various applications with only one controller are possible. The controller, for example, can operate with two coolers if the evaporator sensor is parametered as sensor for a second refrigerating chamber. 900312.007