Click the above link for an exclusive article on RS232 Communications
RS232 Relay Article RS232 Relay Article NCD Base Station Software .zip file  Base Station identifies the controller that is attached to your computer and provides a convenient graphical user interface for controlling and testing your NCD Device. Download Manual Download the 2 Channel RS232 Product Manual E3C Complient Download E3C Complient Specs Download VB Samples Download VisualBasic 6 Example Source Code NCD Component Library The NCD Component Library is a Plug-In for Visual Studio 2005/2008 that greatly reduces software development time, effectively reducing most control operations to a single line of code.  This free download includes four example applications compatible with the Pro Series. Wiring Diagrams These wiring diagrams will help you understand how to connect to your devices and use relays as a form of control logic