Add a 6-foot or 15-foot EIA-232 serial port cable to a PC USB port to communicate with SEL relays and other devices with EIA-232 serial ports.
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USB to EIA-232—Interact with SEL relays and other devices by connecting the USB Standard-A plug to a 9-pin male (SEL-C662) serial port.
Add Serial Ports to Personal Computers
Use serial data rates up to 115,200 bps. Many devices communicate with EIA-232 serial ports, but many new computers do not have sufficient built-in serial ports. Apply SEL adapter cables to use a USB port to communicate with serial devices.
The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.