2d Keyboard for Speed Dome Camera

1, The output is use photoelectric isolation and use RS485 to control, good anti - interference capacity, standard transport distance up to 1200m. 2, Can control 255 address of dome camera / decoder and other terminal equipments, range of address code is 0~255.3, Power supply: DC9~12V 500mA 4, Power adaptor: AC220V± 10% 50/60HZ transfer to be DC9V 500mA 5, Connection: Use RS-485 to connest control panel and control equipments to use RS-485 bus control mode 6, Communication speed: 1200/2400/4800/9600/19200BIT/S 7, Communication distance: 1200M(0.5MM twisted-pair)