USB to RS232 communication cable for Keyence PLC to PC FTDI chip built-in.6ft/1.8m FTDI USB to RJ11 RJ12 6P6C programming cable for Keyence PLC. The cable is for Keyence PLC to PC, not works for phone usage. not works for headset device. We are not sure if this works with all Keyence PLC or not, please make it clear for the pinout of your model before you buy it.