Select I/O is an Ethernet networked, single channel granular I/O system for the ABB Ability™ System 800xA automation platform. Select I/O helps decouple project tasks, minimizes the impact of late changes, and supports standardization of I/O cabinetry ensuring automation projects are delivered on time and under budget. A Signal Conditioning Module (SCM) performs the necessary signal conditioning and powering of the connected field device for one I/O channel.
The TB868 Modulebus Terminator is required for the termination of the Modulebus at the end of each cluster. If Compact Modulebus Extensions are used between groups of I/O units, the Modulebus Terminator has to be placed at the end of the last group. The Modulebus Terminator is connected at the bottom of the last I/O MTU. One Modulebus Terminator is needed per cluster.
