{"product_id":"440r-em4r2d-allen-bradley-guardmaster-emd-expansion-module-safety-relay","title":"440R-EM4R2D | Allen-Bradley Guardmaster EMD Expansion Module Safety Relay","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 440R-EM4R2D\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a high-performance\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eGuardmaster EMD\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eexpansion module designed to increase the number of safety-related outputs in a control system. This module utilizes\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSingle-Wire Safety (SWS)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003etechnology to link seamlessly with a base safety relay, providing four additional Normally Open (N\/O) time-delayed relay outputs. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal factory stock, ensuring your safety circuits meet the rigorous demands of SIL 3 and PLe performance standards while providing controlled deceleration for industrial machinery.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen-Bradley \/ Rockwell Automation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eGuardmaster Safety Relays (GSR)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEMD Expansion Module (Time-Delayed)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSafety Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 Single-Wire Safety (SWS) Input\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSafety Outputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 N\/O Relay Safety Outputs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAuxiliary Outputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 Solid-State Auxiliary Output\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24V DC Nominal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3.5 Watts\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eElectromechanical Relay (Delayed)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e35mm DIN Rail\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.35 lbs (0.16 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSingle-Wire Safety (SWS) Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 440R-EM4R2D accepts a single-wire safety signal from a master GSR relay. This architecture eliminates complex redundant wiring between modules, reducing installation time and potential points of failure within the safety string.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConfigurable Time Delays:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis EMD module provides precise control over power-down sequences. Engineers set specific time delays for the four relay outputs, allowing motors to ramp down or machines to reach a stationary state before the safety system removes final power (Category 1 Stop).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Density Output Expansion:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMeasuring just 22.5mm wide, this module adds four safety-rated contacts to the system without consuming excessive DIN rail space. This compact form factor solves the challenge of upgrading safety functionality in crowded legacy control cabinets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDiagnostic Feedback:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe integrated solid-state auxiliary output provides real-time status data to a PLC or HMI. This allows maintenance teams to distinguish between a safety trip and a module fault instantly, significantly reducing mean time to repair (MTTR).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBroad Environmental Tolerance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 440R-EM4R2D operates reliably in standard industrial conditions. Its rugged internal relays handle inductive loads, providing a robust interface between low-voltage logic and high-power motor contactors or actuators.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 440R-EM4R2D function as a standalone safety relay?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. This is an expansion module. It requires a Single-Wire Safety (SWS) signal from a base Guardmaster safety relay (such as a 440R-GL2S2P or 440R-DI22P2) to initiate its safety function.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I set the specific time delay for the outputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe front face of the module features rotary switches. These switches allow you to select the time range and the specific multiplier to achieve the desired delay for your specific application requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I daisy-chain multiple 440R-EM4R2D modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. You can connect multiple expansion modules to a single base relay using the SWS terminal, provided the total system stays within the current limits of the power supply and the master relay's drive capability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine factory-new unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. We guarantee this 440R-EM4R2D is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e. It ships in its original Allen-Bradley factory packaging with intact security seals, ensuring the electromechanical relays have zero operations on them prior to your installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52532307919157,"sku":"440R-EM4R2D","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/440R-EM4R2D.jpg?v=1775206196","url":"https:\/\/www.5gplc.com\/products\/440r-em4r2d-allen-bradley-guardmaster-emd-expansion-module-safety-relay","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}