Working voltage: AC220V 10% 50 Hz Output voltage: DC24V Channel number: simulation 16 or 32 road, number 255 Signal input: 485 digital signal, analog (4-20 mA current) signal input Communication interface: (optional) 1 road RS232 and RS485 digital bus interface, Standard ModBus RTU protocol or non-standard, can connect the computer monitor Alarm way : first alarm more than 90 dB alarm way; second alarm more than 120 dB
