What is the difference between base, analog and digital?

This refers to the DYNEO DD products. The base unit includes a USB port for external communication. The Analog version (you will see a ‘.A’ in the part number) adds an analog module for remote control via current or voltage. The Digital version (you will see a ‘.D’ in the part number) adds an RS232 port for external communication. All versions of the DYNEO DD have USB included.