This product is a USB2.0 -compatible terminal that extends digital signal input or output function to a personal computer.No power supply from the outside is required due to USB bus power driving.Equipped with 8 non -insulating TTL level input and 8 points of non -insulating open collector output.In addition, a protective circuit (surge protection) and a terminal connector with easy wiring are used for the input / output circuit.A Windows driver is attached.- [Extended module] Bus specification USB 2.0 Size Y type Used connector 2X Screw terminal stand 14-pin [Digital input/output] number of input points 8 points Output points 8 points two -way score - Response speed (input) 200nsec (max.) Response speed (output) 200nsec (max.) Operate voltage (input) 5VDC-TTL Operate voltage (output) 5VDC-TTL input circuit Non -insulated TTL level input (negative portion) Output circuit Non -insulated TTL Open Collector Output (negative theory) Built -in power supply -