1791-16BCThe Allen Bradley 1791 16BC by Rockwell Automation is a discontinued Block I O device offering 16 inputs and 16 outputs at 24VDC. It operates within a 10 30VDC voltage range, mounts vertically or horizontally, and features two input output groups. This compact unit ensures efficient control within automated systems, despite its obsolescence. Manufacturer Rockwell Automation Output Voltage Range 10 30VDC Brand Allen Bradley Product Type Block I O No.