Rockwell Automation 5370-CUPK Color CVIM USER-PAK Option - Manual (Page 18)

Chapter 2
Introduction to the USER–PAK Option
2 – 7
With the USER-PAK option installed, you can connect a mouse or trackball
to a Color CVIM serial port, and use the mouse to manipulate the Color
CVIM menus, instead of a light pen.
Connect and Use a Mouse