The GV-NET/IO card allows you to control PTZ cameras within the software interface just like the GV-NET card, but this card adds 4 digital input channels and 4 relay output channels. This card is compatible with the GV-600, GV-650, GV-800, GV-1120, GV-1240, and GV-1480 DVR cards.
The two different type of connections used to convert data on this card are the RS-232 connection and the RS-485 connection.
The GV-NET Card is an interface converter that can be installed inside a PC. The GV-NET/IO Card adds 4 digital inputs, and 4 relay outputs.