USB to RS-232C Cable (CS1W-CIF31) Settings When plugging the CS1W-CIF31 into the USB port, ensure that the driver is properly installed. Figure 8: CS1W-CIF31 Driver Installation Check if it properly installed by un-plugging and checking to see if the device shows up and then plugging it in again to ensure it is present and recognized by the computer. If the device does not show up, refer to the instruction sheet included with the product. Page 11 of 37