{"product_id":"allen-bradley-855e-20dn4-control-tower-stack-light","title":"Allen-Bradley 855E-20DN4 Control Tower Stack Light","description":"\u003cdiv\u003e\u003cp\u003eAllen-Bradley 855E-20DN4 Control Tower Stack Light is a 50 mm light module from Rockwell Automation's 855E Control Tower signaling family. The DN4 designation indicates a steady incandescent lamp in red, designed for 240V AC full-voltage operation, enabling direct connection to standard control circuits without an external transformer. As a single module in a multi-light tower, it provides a constant red status indication for control panels or on-machine signaling, and it is UL Type 4\/4X\/13 and IP65 rated to withstand challenging industrial environments. The 855E-20DN4 is intended to be used with other 50 mm light modules and base hardware to assemble a stack light that conveys multiple status conditions, such as run, stop, or fault, on a single vertical assembly. Typical applications include manufacturing lines, packaging stations, conveyors, robotics cells, and CNC equipment where immediate visual feedback is critical to operator awareness and process control. With its compact 50 mm footprint and direct 240V AC connection, this module integrates into standard industrial signaling setups within automation panels and machine areas.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"New","offer_id":51657425027374,"sku":null,"price":91.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_fd84a814-b891-4620-884e-08b4d56fc92a.jpg?v=1769468816","url":"https:\/\/plgautomation.com\/products\/allen-bradley-855e-20dn4-control-tower-stack-light","provider":"PLG Automation ","version":"1.0","type":"link"}