... prompt earthing switch close; Dry contact input open, prompt earthing switch open;-CB Spring status indication While the spring of ... then operator will be reminded ,“Please open CB,Please open earthing switch”-Temperature & humidity display and Control² Model SGC-03T has ... overheating alarm-RS485,MODBUS communication protocol, 103 communication protocol. -Open hole size on CB panel: 220mm×165mm -EMC, ...