The Allen-Bradley 1771-IND is a 16-point digital input module for the PLC-5 1771 remote I/O network, designed to route field signals back to the controller. It accepts 24 V AC input signals for reliable sensing of common automation devices such as contact sensors, limit switches, and pushbuttons. Installed in a 1771 I/O chassis, it communicates with the PLC-5 controller over the 1771 I/O bus to provide real-time status to the logic program. This module is typically used to expand input count in discrete automation applications across manufacturing lines.
