The Allen-Bradley 1771-OBN is a high-density digital DC output module for the Rockwell Automation PLC-5 system. It provides 32 high-true (sourcing) outputs, organized in four isolated groups of eight, making it ideal for controlling a wide range of DC loads in industrial environments. This module is designed to interface the PLC-5 processor with field devices such as pilot lights, solenoids, motor starters, and annunciators. Its robust design ensures reliable performance in demanding automation applications, offering a compact and efficient solution for expanding system control capabilities within a 1771 I/O chassis.