{"product_id":"allen-bradley-440r-d22r2-guardmaster-dual-input-safety-relay","title":"Allen-Bradley 440R-D22R2 Guardmaster Dual Input Safety Relay","description":"\u003ch2\u003eAllen-Bradley 440R-D22R2 Guardmaster Dual Input Safety Relay\u003c\/h2\u003e\n\u003cp\u003eConfigured for dual safety-zone evaluation in Guardmaster safety control systems, the \u003cstrong\u003eAllen-Bradley 440R-D22R2\u003c\/strong\u003e (\u003cstrong\u003e440R-D22R2\u003c\/strong\u003e safety relay) provides selectable AND\/OR logic, reset control, and relay-based safety outputs.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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-D22R2\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eGuardmaster Dual Input Safety Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e119.4 mm H x 22.5 mm W x 113.6 mm D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-5 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\u003e2.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC, 20.4 to 26.4 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Inputs\u003c\/td\u003e\n\u003ctd\u003e2 dual-channel universal inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Input Devices\u003c\/td\u003e\n\u003ctd\u003e1 N.C., 2 N.C., OSSD, safety mats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Outputs\u003c\/td\u003e\n\u003ctd\u003e2 N.O. electromechanical relay contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuxiliary Output\u003c\/td\u003e\n\u003ctd\u003e1 N.C. solid-state PNP output, 50 mA continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAggregate Output Current\u003c\/td\u003e\n\u003ctd\u003e6 A maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Rating\u003c\/td\u003e\n\u003ctd\u003ePLe, ISO 13849-1; SIL 3, IEC 61508; Category 4, EN 954-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eIP40 enclosure, IP20 terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eRemovable screw terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReset Modes\u003c\/td\u003e\n\u003ctd\u003eAutomatic\/Manual or Monitored Manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogic Selection\u003c\/td\u003e\n\u003ctd\u003eAND \/ OR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle Wire Safety\u003c\/td\u003e\n\u003ctd\u003eSWS input and output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eGuardmaster Safety Logic and I\/O Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 440R-D22R2 provides two dual-channel universal safety inputs for separate safety zones.\u003cbr\u003eInput compatibility includes normally closed devices, OSSD devices, and safety mat interfaces.\u003cbr\u003eA front rotary selector configures the internal logical relationship between the two safety zones.\u003cbr\u003eThe selectable AND function requires both configured safety conditions to satisfy the relay logic.\u003cbr\u003eThe selectable OR function permits either configured safety condition to control the associated logic path.\u003cbr\u003eSingle Wire Safety supports cascading safety functions between compatible safety relays with reduced interconnection wiring.\u003cbr\u003eThe output stage provides two normally open electromechanical safety contacts and one auxiliary PNP output.\u003cbr\u003eThe auxiliary solid-state output supports continuous current up to 50 mA according to supplied specifications.\u003cbr\u003eReset configuration supports automatic\/manual operation and monitored manual reset operation.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What supply voltage does the 440R-D22R2 require?\u003cbr\u003eA: The relay operates from 24 VDC within the specified range of 20.4 to 26.4 VDC.\u003c\/p\u003e\n\u003cp\u003eQ: What safety input devices can the relay monitor?\u003cbr\u003eA: The two universal dual-channel inputs support N.C. devices, OSSD devices, and safety mats.\u003c\/p\u003e\n\u003cp\u003eQ: Can the relay be mounted directly inside a control cabinet?\u003cbr\u003eA: Yes. The supplied specifications identify 35 mm DIN rail mounting with IP40 enclosure protection and IP20 terminals.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the relay on a compatible 35 mm DIN rail with adequate clearance for terminal access and wiring.\u003c\/p\u003e\n\u003cp\u003eVerify the 24 VDC supply remains within the specified 20.4 to 26.4 VDC operating range.\u003c\/p\u003e\n\u003cp\u003eSeparate safety input wiring from high-current conductors, motor cables, and switching circuits to reduce electrical interference.\u003c\/p\u003e\n\u003cp\u003eRoute OSSD and other safety-device conductors according to the connected device manufacturer's wiring requirements.\u003c\/p\u003e\n\u003cp\u003eTerminate cable shields according to the applicable control-panel grounding scheme and avoid unintended shield current paths.\u003c\/p\u003e\n\u003cp\u003eUse removable screw terminals with conductors secured against mechanical movement and accidental contact between adjacent circuits.\u003c\/p\u003e\n\u003cp\u003eConfigure the front rotary selector only after confirming the required AND or OR safety logic.\u003c\/p\u003e\n\u003cp\u003eSelect automatic\/manual or monitored manual reset according to the safety circuit design and connected reset device.\u003c\/p\u003e\n\u003cp\u003eVerify both safety channels independently during commissioning before placing the safety circuit into service.\u003c\/p\u003e\n\u003cp\u003eConfirm each safety output changes state correctly when the corresponding safety input condition is interrupted.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43874649735258,"sku":"440R-D22R2","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/440R-D22R22.jpg?v=1787218671","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-440r-d22r2-guardmaster-dual-input-safety-relay","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}