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 ALR121-S50 S1 Serial Communication Module Product Introduction The Yokogawa ALR121-S50 S1 Serial Communication Module is a high-reliability industrial communication interface designed for secure and accurate serial data transmission. It connects field instruments and legacy devices *Your Name: *Your Email: *Your Name: *Vdcode: Submit