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. Yokogawa AFF50D-H41201 FIO Field Control Unit Introduction The Yokogawa AFF50D-H41201 FIO (Field I/O) Field Control Unit is designed to handle the collection, processing, and transmission of data from field devices to central control systems. This unit is integral to Yokogawa’s Centu *Your Name: *Your Email: *Your Name: *Vdcode: Submit