2. Connect the serial cable to the COM 1 or COM 2 port.
3.If the connector has retaining screws, tighten them by hand or with a screwdriver.
4.Connect the other end of the cable to the serial device. If the connector has retaining screws, tighten them.
5.Connect the serial device’s power cable (if it has one) to a grounded (earthed) electrical socket.
Check the documentation that came with your serial device to see if any other steps are necessary.