GV-NET Card The GV-NET Card V3.1 is a RS-485 / RS-232 interface converter that can be installed inside a PC. It also supports connection via USB port.

GV-IO 12-Out CardWith 12 relay outputs, the GV-IO 12-Out Card is designed to work with GV-NET/IO Card to provide an interface for your external devices such as alarms and gates.

GV-NET is a device that converts RS-232 to RS-485. To be connected to COM1 or COM2 of your computer...