{"product_id":"allen-bradley-440r-s12r2-guardmaster-single-input-safety-relay","title":"Allen Bradley 440R-S12R2 Guardmaster Single Input Safety Relay","description":"\u003ch1\u003eAllen-Bradley 440R-S12R2 Guardmaster Single Input Safety Relay\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 440R-S12R2\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e440R-S12R2\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSafety Relay, operates as a dedicated hardware component for safety circuit monitoring and output control within Guardmaster machine safety systems. The relay processes dual-channel safety inputs from mechanical contacts, OSSD devices, and safety mats, executing fail-safe output switching through monitored relay contacts.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"___1vyiefv f1ddd56o f16vktn6 f1ahpp82 f11qra4b f1uinfot fibjyge fvueend f9yszdx f1fu4s3n f3l3pb3 f10ghnd0 f8fmt76 fjvbh62 f1qrqxae f1vw5qpk fc02sbz fxawf59 fymf513 f1aoyrul f1el8yx3 f1pymoxg f1ofu761 fe6itr f7coize f1794535 f1o0pw0q fbjjl9v fk1v6el f16pyhcb f1ixlhx9 f12zef0i flu5r5u f19haqzy f1owmcxx f1oddm8q f1004tna fcoaxci fh0ee9u f15v23i2 f1dmj53 f1r1gcv9 f14z1veh ffufd3x f1ypplot f1660cg\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e440R-S12R2\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eSingle Input Safety Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eGuardmaster GSR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e20.4 to 26.4 VDC\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\u003eThermal Current\u003c\/td\u003e\n\u003ctd\u003e6 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Inputs\u003c\/td\u003e\n\u003ctd\u003e1 Dual-Channel Universal Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Input Devices\u003c\/td\u003e\n\u003ctd\u003eMechanical Contacts, OSSD Signals, Safety Mats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Outputs\u003c\/td\u003e\n\u003ctd\u003e2 N.O. Relay Contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuxiliary Outputs\u003c\/td\u003e\n\u003ctd\u003e1 N.C. Solid-State Output, 1 PNP Status Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSWS Communication\u003c\/td\u003e\n\u003ctd\u003e1 Single Wire Safety Link\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReset Modes\u003c\/td\u003e\n\u003ctd\u003eAutomatic, Manual, Monitored Manual\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\u003eWire Size\u003c\/td\u003e\n\u003ctd\u003e24 to 14 AWG (0.2 to 2.5 mm2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatus Indicators\u003c\/td\u003e\n\u003ctd\u003ePower, Fault, Input, Output LEDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerformance Level\u003c\/td\u003e\n\u003ctd\u003ePLe, Category 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Integrity Level\u003c\/td\u003e\n\u003ctd\u003eSIL CL3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Life\u003c\/td\u003e\n\u003ctd\u003e10,000,000 Operations\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\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eIP40 Housing, IP20 Terminals\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\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e119.4 mm x 22.5 mm x 113.6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.15 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSafety Logic Architecture and Deterministic Switching\u003c\/h3\u003e\n\u003cp\u003eThe 440R-S12R2 is designed for single safety-zone monitoring applications requiring deterministic safety response. The relay supports dual-channel input validation and can monitor emergency stop devices, guard switches, safety interlock circuits, OSSD safety outputs, and pressure-sensitive safety mats.\u003c\/p\u003e\n\u003cp\u003eIntegrated Single Wire Safety (SWS) functionality permits interconnection with compatible Guardmaster safety relays without requiring additional hardwired status circuits. The relay continuously monitors input status, reset conditions, and output feedback to maintain defined safety logic operation.\u003c\/p\u003e\n\u003cp\u003eThe two immediate safety outputs are intended for direct safety circuit control, while auxiliary outputs provide diagnostic and status information to control systems and operator interfaces.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What safety performance level does the 440R-S12R2 support?\u003c\/strong\u003e\u003cbr\u003eA: The relay is rated for PLe, Category 4 according to ISO 13849-1 and SIL CL3 according to IEC 62061 and IEC 61508.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which input device types are supported?\u003c\/strong\u003e\u003cbr\u003eA: The universal dual-channel input supports mechanical safety contacts, OSSD semiconductor outputs, and safety mat devices.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the relay support monitored manual reset functions?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Automatic reset, manual reset, and monitored manual reset modes can be selected using the integrated rotary configuration switch.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eMount the relay on a properly grounded 35 mm DIN rail.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify supply voltage remains within the specified 20.4 to 26.4 VDC operating range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUse separate wiring routes for safety circuits and non-safety control circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify correct dual-channel wiring when connecting emergency stop or guard switch devices.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConfirm reset mode selection matches the machine risk assessment and safety design.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInspect removable terminals for secure wire retention before energizing the system.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify LED indicators during commissioning to confirm correct input, output, and fault status.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerform functional safety testing after installation, maintenance, or wiring modifications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67639369171018,"sku":"440R-S12R2","price":4500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/8569\/3770\/files\/440R-S12R2_1.png?v=1791445406","url":"https:\/\/www.topbrandsplc.com\/products\/allen-bradley-440r-s12r2-guardmaster-single-input-safety-relay","provider":"Topbrands PLC Limited","version":"1.0","type":"link"}