AMIKON Industrial Supply · Yokogawa Control Systems Yokogawa ADV859-P00 Digital I/O Module Module OverviewDigital Input & Output The Yokogawa ADV859-P00 is a Digital I/O Module for Compatible ST2. It receives contact or voltage status signals from field devices and provides transistor-contact outputs. Its pulse-width and time-proportioning output functions support mixed digital signal acquisition and output tasks in supported CENTUM-ST installations. 16 Input Points Contact