Signal Isolation Board AIB-U to Isolates Drives from Signal Sources, Industrial DutyAUcontrols Industrial Signal Isolation Board, Model: AIB U Electrically Isolates Signals from PLCs, CNCs, etc. to operate DC or AC Motor Drives. USA made. Description: The AIB U is designed to electrically isolate and safely transmit control signals from a PLC, CNC, or any other electronic signal source to DC or AC motor speed controllersprotecting your system from electrical non insulated circuits, noise or interference. Key Features: Supports up to