Single converting device for BNC (bayonet nut connector) interface

The utility model relates to single transmission equipment, in particular to a single converting device. The single converting device for a BNC (bayonet nut connector) interface comprises two-wire system single input interfaces, a PCB (printed circuit board) wiring board and BNC output interfaces. Terminals of the two-wire system single input interfaces are as many as that of the BNC output interfaces, the terminals of the BNC output interfaces are serially connected to form a loop, and the terminals of the two-wire system single input interfaces are in one-to-one correspondence with the BNC output interfaces. The single converting device is capable of converting two-wire system type signals into singles acceptable to the BNC interface of an acquirer.