If you have questions about our products, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. ABB Bailey NDSO04 Digital Slave Output Module Product Introduction The ABB Bailey NDSO04 Digital Slave Output Module is an industrial automation interface designed to transmit control commands from a distributed control system to field devices. By converting digital control instruction *Your Name: *Your Email: *Your Name: *Vdcode: Submit