It is an interface card for PCI Express bus conformity. it can count a pulse signal from an outside device input. 32 bits up/down counter has 4 channel. It is connected to a rotary encoder, a linear scale and can use it. Input interface of a pulse signal is the Non-isolated LVTTL level input that can input a high-speed pulse signal. The high-speed data transmission between A card and PCs are possible by bus master transfer. Attachment Windows version driver(API-PAC(W32)).