... Data AccuracyDisplay accuracy: 0.5,0.2 class, Frequency meter 0.1 class, Transmitting: 0.5 classDisplay4 ... withstand voltagePower and input supply,Transmitting output,Communication interface AC2kV, Input,Transmitting output,Communication interface between each other ... output, Load100kΩDigital valueRS-485 interface, MODBUS-RTU protocol, Baud rate default 9600(optional 4800,9600)bps digital frequency ...