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 SDV144-S33 Digital Input Module Introduction The Yokogawa SDV144‑S33 Digital Input Module is a rugged industrial interface designed to capture discrete (on/off) signals from field devices such as switches, sensors, and contact outputs. Engineered as part of Yokogawa’s *Your Name: *Your Email: *Your Name: *Vdcode: Submit