The Allen-Bradley 1771-ODC NSNBC01 DC Output Module is a DC output module designed for use with Allen-Bradley 1771 I/O backplanes in PLC-5‑style control systems. As part of the 1771 DC output family, it provides DC switching outputs used to energize external devices such as relays or solenoids, powered from a DC supply in the 10–30 V range. The module is intended for installation in compatible 1771 backplanes and carries the 1771-ODC designation, with NSNBC01 representing a specific module variant within that lineup.
