Allen-Bradley 855TP-B24D3D5D4 NSNBC01 PLC Module

Allen-Bradley 855TP-B24D3D5D4 NSNBC01 is a pre-assembled Allen-Bradley Control Tower Stack Light that provides multi-level visual signaling for industrial equipment. This 70 mm tower light is designed for quick, at-a-glance status indication on machines, mounting on a 10 cm pole to keep indicators clearly visible in crowded control areas. The B24 designation indicates a 24 V power configuration, compatible with common factory control systems, while the D3D5D4 color-code arrangement denotes three stacked indicator lenses configured to convey distinct process states in a single compact package. The Black (B) base variant and integrated housing support robust operation in demanding environments, with a form factor that fits on conveyors, packaging lines, presses, and other automated equipment where fast recognition of status and faults is critical. As part of the 855T family, it benefits from tool-free assembly and modular lens configurations, enabling straightforward field updates or reconfigurations to match changing signaling needs. In practice, users install this signaling device to enhance operator awareness, reduce downtime, and improve safety on production lines by providing clear, immediate cues for normal operation, warnings, or alarms, all from a single, easy-to-read stack light assembly that integrates with standard 24 V control circuits.