All Chemyx syringe pumps can be controlled by a computer using an RS232 DB9 serial cable or a USB serial cable.
For the DB9 serial connection, a Male-to-Female DB9 cable must be used. Do not use any null modem, crossover, or crossed-over cables. The cable can be of any length up to 50 ft; however, the speed of the connection is often detrimentally affected at lengths over 15 ft.
For a USB serial connection, a USB-A to USB-B cable should be used. The maximum functional length of a single USB cable is 15 ft; however, USB cables should be less than 10 ft for optimum performance. Multiple USB cables can be chained together to make a longer connection, as long as the hub connecting each individual cable is connected to a power supply.
Because most modern computers typically do not come with an RS232 DB9 connection, connecting a computer to the Nexus pump, which only has DB9 connections, often requires a USB-to-DB9 serial adapter.