ABB DDO01 Digital Output Module

The ABB DDO01 is a 16-channel digital output module designed for the ABB Freelance 2000 distributed control system (DCS), formerly known as Hartmann & Braun Freelance 2000 . It serves as the execution interface between the controller and field devices, converting internal logic signals into discrete output commands that drive relays, solenoids, indicator lights, and other industrial actuators . As an essential component for legacy Freelance 2000 systems, the DDO01 remains a critical spare part for maintaining continuous operation in process control environments. This module is particularly valued for its robust isolation design and reliable performance in high-noise industrial settings.