Basic parameters Size460 mm * 300 mm * 150 mm Weight: about 7 kg Working voltage: ac220v 10% 50 hz Output voltage: dc24v The number of channels: 1 - 16 Digital tube display mode: highlight inspection display mode Signal input: rs485 bus transmitter Communication interface:(optional) 1 road rs232 and rs485 bus interface Standard mod bus rtu protocol or non-standard, can connect the computer monitor Measurement range: 0-9999 (can be set ) Alarm way: first alarm more than 90 db alarm way; Second alarm more than 120 db Control output: 8 channel relay ou tput, Distribution channel address, 1 bus relay output Temperature range: - 10 ~ 50 Humidity: 15% ~ 70% rh (no condensation) Execution standard: the combustible gas alarm controller gb16808-1997 technical requirements and test methods Installation method: wall-mounted installation