{"product_id":"allen-bradley-440-em4r2d-guardmaster-safety-relay","title":"Allen-Bradley 440-EM4R2D Guardmaster Safety Relay","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 440R-EM4R2D\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e440R-EM4R2D\u003c\/strong\u003e Guardmaster Safety Relay, operates as a dedicated hardware component for emergency stop and interlock circuit evaluation within industrial safety control systems.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e440R-EM4R2D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.30 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard DIN-rail mount safety relay enclosure profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-10 deg C to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VAC\/DC control supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Outputs\u003c\/td\u003e\n\u003ctd\u003eForce-guided relay contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuxiliary Outputs\u003c\/td\u003e\n\u003ctd\u003eDiagnostic monitoring contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eGuardmaster Safety Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Safety Networks and Firmware Synchronization\u003c\/h3\u003e\n\u003cp\u003eThe safety relay evaluates redundant dual-channel inputs from emergency stop buttons and safety gates, maintaining high-speed logic execution across Profinet and EtherNet\/IP deterministic networks. Engineered to enforce immediate de-energization of downstream actuators upon fault detection, the internal circuit architecture provides galvanic isolation and cross-fault monitoring. Full firmware flash compatibility with safety-rated controllers guarantees synchronized diagnostic reporting and reliable restart interlock management during machine cycling.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What supply voltage does the 440R-EM4R2D safety relay require for operation?\u003c\/p\u003e\n\u003cp\u003eA: The relay is designed to operate on a standard 24 VAC\/DC control power supply.\u003c\/p\u003e\n\u003cp\u003eQ: Can the safety outputs be connected directly to high-current motor loads?\u003c\/p\u003e\n\u003cp\u003eA: No. Safety relay output contacts should interface with dedicated safety contactors or interposing relays configured with appropriate surge suppression for inductive loads.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the relay securely onto a standard 35 mm DIN rail inside an enclosure rated IP54 or higher to protect against environmental contamination. Route all safety input and output wiring in dedicated conduits separated from high-voltage power lines to prevent electromagnetic interference. Verify that all terminal screws are torqued correctly to maintain low-resistance connections and reliable mechanical retention under continuous industrial vibration.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":66881122107507,"sku":"440-EM4R2D","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/440R-EM4R2D2_Cocoai_1b55f215-952f-4eae-88e0-589ddb7dec8b.jpg?v=1792134835","url":"https:\/\/www.dcssupplier.com\/products\/allen-bradley-440-em4r2d-guardmaster-safety-relay","provider":"DcsSupplier Limited","version":"1.0","type":"link"}