{"product_id":"allen-bradley-440r-w23218-guardmaster-safety-relay-input-module","title":"Allen-Bradley 440R-W23218 Guardmaster Safety Relay Input Module","description":"\u003ch2\u003eAllen-Bradley 440R-W23218 Guardmaster Safety Relay Input Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for safety input processing in modular Guardmaster safety relay systems, the \u003cstrong\u003eAllen-Bradley 440R-W23218\u003c\/strong\u003e (\u003cstrong\u003e440R-W23218\u003c\/strong\u003e input module) provides direct 24 VDC electrical interfacing.\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-W23218\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 Line\u003c\/td\u003e\n\u003ctd\u003eGuardmaster Safety Relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eInput Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.75 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e3 W rated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuxiliary Outputs\u003c\/td\u003e\n\u003ctd\u003e2 PNP solid-state outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Functions\u003c\/td\u003e\n\u003ctd\u003e1 NC \/ 2 NC \/ 3 NC \/ safety mat \/ light curtain input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eRemovable terminal block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eDIN-rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Wire Size\u003c\/td\u003e\n\u003ctd\u003e0.20 mm2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Wire Size\u003c\/td\u003e\n\u003ctd\u003e2.5 mm2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal IP Protection\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing IP Protection\u003c\/td\u003e\n\u003ctd\u003eIP40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Rating\u003c\/td\u003e\n\u003ctd\u003eCategory 4 rated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eGuardmaster Safety Relay Interface Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 440R-W23218 provides input interfacing for modular safety relay configurations using 24 VDC supply power.\u003cbr\u003eInput configurations include NC contact arrangements, safety mats, and light curtain devices for safety circuit monitoring.\u003cbr\u003eTwo PNP solid-state auxiliary outputs provide discrete status signaling to associated control equipment.\u003cbr\u003eThe removable terminal block supports field wiring within the specified 0.20 mm2 to 2.5 mm2 conductor range.\u003cbr\u003eDIN-rail mounting provides mechanical installation on standard control cabinet rail assemblies.\u003cbr\u003eThe supplied material identifies MSR320P and Category 4 operation within the associated safety relay configuration.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What supply voltage does the 440R-W23218 require?\u003cbr\u003eA: The specified rated supply voltage is 24 VDC, with a rated power requirement of 3 W.\u003c\/p\u003e\n\u003cp\u003eQ: What auxiliary output configuration is provided?\u003cbr\u003eA: The module provides two PNP solid-state auxiliary outputs for discrete auxiliary signaling.\u003c\/p\u003e\n\u003cp\u003eQ: What wiring and mounting provisions are specified?\u003cbr\u003eA: The module uses removable terminals, DIN-rail mounting, and supports 0.20 mm2 to 2.5 mm2 conductors.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module on the specified DIN rail with adequate mechanical retention before connecting field conductors.\u003cbr\u003eVerify the 24 VDC supply polarity and protective bonding arrangement before applying operating power.\u003cbr\u003eUse conductors within the specified 0.20 mm2 to 2.5 mm2 range for removable terminal connections.\u003cbr\u003eRoute safety input wiring separately from high-current switching circuits, motor conductors, and high-noise power cables.\u003cbr\u003eMaintain consistent terminal identification throughout the safety circuit to prevent cross-wiring during commissioning.\u003cbr\u003eConnect shielded signal cables according to the applicable system wiring specification where shielding is required.\u003cbr\u003eTerminate cable shields using the established cabinet grounding method without creating unintended signal return paths.\u003cbr\u003eConfirm the required NC contact, safety mat, or light curtain circuit before energizing the safety relay system.\u003cbr\u003eVerify auxiliary PNP output wiring against the receiving input circuit before commissioning connected control equipment.\u003cbr\u003eInspect terminal seating and mechanical retention after completing all field wiring operations.\u003cbr\u003ePerform functional safety testing after installation and verify each configured safety input response independently.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43874666840154,"sku":"440R-W23218","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/440R-W232182.jpg?v=1787219527","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-440r-w23218-guardmaster-safety-relay-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}