The OilPro USB-Serial Adaptor/Isolator is used to connect the RS232 cable of the OilPro system to the USB port on a PC.
This product was specifically designed for use with the OilPro Oil Management System and has built in optical isolation devices to help protect the communication equipment from damage resulting from voltage spikes caused by static and lightning discharge. In effect, a major voltage surge may destroy electronic equipment ‘upstream’ of the OilPro USB-Serial adaptor (and possibly the adaptor itself) but devices further down the communication channel would be protected.