Most new PCs sold today no longer have the 9 pin serial port. A serial to USB converter found in most Office Supply Stores can convert a USB port for this purpose.
DB9 to RJ45 converters are shipped with your GRIDlink

One is prewired for this and 2 are configurable. For pin out information go here …

Using the RJ45 to RS232 converter, connect an CAT5e patch cable to the USB converter. Your cable should look like this:.
Serial port B
Connect your PC using the USB side to the RS232 Port B found on the top of the controller.

Caution, do not connect to the Ethernet port by mistake. It is a common error.