Abus tv8469 interface converter rs232 to rs485 abus tv8469 p the abus tv8469 interface converter rs232 to rs485 allows you to control a ptz dome camera tv7600 tv7604 from your pc the interface converter is connected to the pc by a serial port rs232 and the dome camera is connected to the interface converter with a 2 core rs485 bus cable p p you can operate a total of 31 dome cameras with your pc one dome camera is connected directly to the converter and the other 30 cameras are c