... and modifying parameters of switch. The step is one. Standard RS485/232comunication interface;With the protective functions of over current, short- circuit ... plug-in typeTechnical Data TypeQJZ(QJZ1)-2000/1140,660-4,6,8,9,10,11,12StructureContactor: the control box is ... 2000Branch max current(A)400Working frequency(Hz)50Number of loops4,6,8,9,10,11,12loopsContactor capacity (A)400Combination modesEach ...