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ABB NTU-7I648S1 is a Digital Input Module Termination Unit for the Bailey Infi 90 product family.
From a maintenance perspective, this class of module brings discrete field status into the control system. Typical signal sources include switches, relay contacts, permissives, and equipment-status circuits when they match the module's electrical requirements. The documented module assignment should remain the basis for selection.
In an Infi 90 installation, modules are assigned distinct control, signal, communication, and support responsibilities. Preserving the exact product identity helps maintain the configuration documented for the affected control node. Connection and configuration should follow the requirements of the platform.
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