The ABB S900 TU921S Termination Unit is a compact and reliable module designed for industrial automation systems. It supports 16 input/output (I/O) channels, making it ideal for connecting sensors and field devices to ABB control systems like Freelance and Symphony Plus. This DIN rail-mounted unit ensures easy installation, secure wiring, and efficient signal transmission. Built for tough environments, the TU921S offers advanced diagnostics for quick troubleshooting and reduced downtime. Perfect for use in industries such as oil and gas, power, and manufacturing, the ABB TU921S enhances system flexibility, reliability, and control performance.