The Metso IOP321 is a compact I/O extension module designed to enhance the capabilities of the Neles ND9000 series of intelligent valve controllers. This module easily integrates inside the ND9000 housing, providing additional input and output channels for more complex process control and monitoring applications. By adding one passive analog input and two binary outputs, the IOP321 allows for the connection of external sensors and the signaling of alarms or status information, increasing the versatility and functionality of your valve automation system without the need for separate I/O hardware.