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The OEM syringe pumps can be controlled with an external computer using an RS232 serial connection.
Two types of connections are available for external computer control: DB9 and USB, cables for each are available for purchase
through Chemyx (call 1-281-277-5499 or visit www.chemyx.com/contact-us).
Most computer operating systems (e.g., Windows, macOS, Linux, etc.) have built-in terminal programs that can be used to
type in the commands that run the pump. On Windows XP and earlier, HyperTerminal can be used to control to the pump. On
macOS and Linux, the screen command in Terminal can also be used to control the pump. There are also numerous third-party
programs for serial connections that exist for each operating system that may be easier to use and provide more features. A
third-party program will be necessary to connect with computers running Windows Vista and later.
For tips on operating the built-in terminal programs and information on available third-party programs, please visit www.
chemyx.com/support.
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 aected
at lengths over 15 ft.
For a USB serial connection, a USB-A to USB-B cable should be used. The maximum possible 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.
A USB-to-DB9 serial adapter can be used to connect a DB9 serial connection to the USB port on a computer.
All of these connections require the proper drivers to be installed on the computer. Typically, most current operating systems
already contain drivers for the USB serial connection. They may also already have drivers for the DB9 serial connection. USB-to-
DB9 adapters typically need to have a USB-to-serial driver installed. For more information on downloading and installing drivers
please visit www.chemyx.com/support.
DB9 Serial Cable (Male-to-Female)
Cable Requirements
Connecting
TTL Connection
USB-A to USB-B cable
Pump Control by Computer