{"product_id":"allen-bradley-440r-em4r2-guardmaster-safety-relay-expansion-module","title":"Allen-Bradley 440R-EM4R2 Guardmaster Safety Relay Expansion Module","description":"\u003ch3 data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"18\" data-end=\"711\"\u003eThe \u003ca href=\"https:\/\/plgautomation.com\/collections\/allen-bradley\" title=\"Allen-Bradley\"\u003eAllen-Bradley\u003c\/a\u003e 440R-EM4R2 Guardmaster \u003ca href=\"https:\/\/plgautomation.com\/collections\/safety-components\" title=\"Safety Relay\"\u003eSafety Relay\u003c\/a\u003e Expansion Module is used in industrial safety control systems to provide additional safety relay outputs and expansion capability when paired with Guardmaster safety relays and controllers. Commonly installed in machine safety panels, automated production systems, and control cabinets where expanded safety output channels are required to monitor more safety devices such as e-stops, safety gates, and light curtains. Safety engineers, maintenance teams, and system integrators use this expansion module for safety system upgrades, retrofit installations, replacement of failed expansion units, and ensuring scalable safety control logic.\u003c\/p\u003e\n\u003ch3 data-start=\"713\" data-end=\"730\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"732\" data-end=\"1112\"\u003eThe Allen-Bradley 440R-EM4R2 expansion module is commonly used in industrial automation environments including manufacturing production lines, robotic workcells, press and forming lines, packaging machinery, material handling systems, and guarded machine enclosures where additional safety outputs are needed to interface with multiple safety devices and controlled stop circuits.\u003c\/p\u003e\n\u003ch3 data-start=\"1114\" data-end=\"1143\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1145\" data-end=\"1843\"\u003e• Manufacturer: Allen-Bradley\u003cbr data-start=\"1174\" data-end=\"1177\"\u003e• Model: 440R-EM4R2\u003cbr data-start=\"1196\" data-end=\"1199\"\u003e• Product Type: Guardmaster Safety Relay Expansion Module\u003cbr data-start=\"1256\" data-end=\"1259\"\u003e• Function: Provides additional safety relay output channels for expanded safety logic\u003cbr data-start=\"1345\" data-end=\"1348\"\u003e• Compatibility: Designed to work with 440R Guardmaster safety relays and controllers\u003cbr data-start=\"1433\" data-end=\"1436\"\u003e• Output Type: Safety rated relay outputs (model dependent count)\u003cbr data-start=\"1501\" data-end=\"1504\"\u003e• Mounting Type: DIN rail or panel mounted expansion module\u003cbr data-start=\"1563\" data-end=\"1566\"\u003e• Interfaces: Connects to safety relay base unit to extend outputs\u003cbr data-start=\"1632\" data-end=\"1635\"\u003e• Application Category: Machine safety, emergency stop, guard monitoring systems\u003cbr data-start=\"1715\" data-end=\"1718\"\u003e• Operating Temperature Range: Industrial rated conditions\u003cbr data-start=\"1776\" data-end=\"1779\"\u003e• Protection Rating: Installed within safety control enclosure\u003c\/p\u003e\n\u003ch3 data-start=\"1845\" data-end=\"1869\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"1871\" data-end=\"2043\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e• Allen-Bradley 440R-EM4R1 Guardmaster Expansion Module\u003cbr data-start=\"1926\" data-end=\"1929\"\u003e• Allen-Bradley 440R-EM2R2 Guardmaster Safety Expansion Module\u003cbr data-start=\"1991\" data-end=\"1994\"\u003e• Omron G9SX Safety Relay Output Expansion Module\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Surplus Original Box","offer_id":50558360322350,"sku":"Surplus Original Box","price":500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/440R-EM4R2_1000x1000_90a4116c-8a8f-4655-b6af-3cd09476efbf.jpg?v=1752216962","url":"https:\/\/plgautomation.com\/products\/allen-bradley-440r-em4r2-guardmaster-safety-relay-expansion-module","provider":"PLG Automation ","version":"1.0","type":"link"}