Allen-Bradley 809S-E1D is a single-phase current monitor (current-monitoring relay) in Rockwell Automation’s 809S family, designed to sense motor or load current and drive an output relay. It specifies a current-sensing range of 0.5 to 5 A and provides two outputs: one normally open and one normally closed. The unit uses 115 V AC control power and supports 50/60 Hz operation, making it suitable for basic motor-protection and current-monitoring tasks in simple 1‑phase circuits. This model was discontinued by the manufacturer on October 30, 2010, according to Rockwell’s historical product data. Typical applications include motor protection and current monitoring for single-phase loads in industrial control systems.
