{"product_id":"allen-bradley-1440-rex03-04rg-xm-442-overspeed-relay-module","title":"Allen-Bradley 1440-REX03-04RG XM-442 Overspeed Relay Module","description":"\u003ch1\u003eAllen-Bradley 1440-REX03-04RG XM-442 Overspeed Relay Module\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1440-REX03-04RG\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as the primary\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1440-REX03\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOverspeed Relay Module utilized to execute voted shutdown relay logic across XM condition monitoring platforms. The module processes overspeed and circuit fault signals from associated XM-220 modules using two-out-of-three and one-out-of-three relay voting architectures.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\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\u003e1440-REX03-04RG\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\u003eXM-442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eOverspeed Relay Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.44 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eOpen style mountable module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Quantity\u003c\/td\u003e\n\u003ctd\u003e4 relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Contact Type\u003c\/td\u003e\n\u003ctd\u003eDPDT, 2 Form C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e250 VAC, 50\/60 Hz, 3 A resistive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoting Logic\u003c\/td\u003e\n\u003ctd\u003eTwo-out-of-three (2oo3), one-out-of-three (1oo3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFailsafe Mode\u003c\/td\u003e\n\u003ctd\u003eNormally energized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003e3 LEDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Activation Level\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 V low logic level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReset Methods\u003c\/td\u003e\n\u003ctd\u003eLocal reset switch, remote reset switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssociated Modules\u003c\/td\u003e\n\u003ctd\u003eXM-220 modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication Standard\u003c\/td\u003e\n\u003ctd\u003eAPI 670, API 612\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDeterministic Relay Voting Architecture\u003c\/h3\u003e\n\u003cp\u003eThe XM-442 relay structure implements voted relay execution using discrete signal comparison from multiple XM-220 overspeed monitoring channels. Under 2oo3 voting configuration, two independent shutdown assertions are required before relay actuation occurs. This arrangement reduces nuisance trips generated by isolated channel disturbances or transient measurement anomalies.\u003c\/p\u003e\n\u003cp\u003eRelay actuation and reset sequencing are managed through deterministic XM backplane communication paths. When integrated into ControlNet-based monitoring systems, relay propagation timing depends on network update intervals, host processing scan rates, and XM communication adapter synchronization states.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1440-REX03-04RG operate independently without XM-220 modules?\u003cbr\u003eA: No. The module is intended to operate with associated XM-220 overspeed monitoring modules that provide the voting input conditions for relay actuation.\u003c\/p\u003e\n\u003cp\u003eQ: What happens to the relay outputs during power loss?\u003cbr\u003eA: The module uses a normally energized failsafe relay configuration. Loss of operating power causes relay state transition consistent with fail-safe shutdown logic.\u003c\/p\u003e\n\u003cp\u003eQ: Are relay outputs mechanically latched?\u003cbr\u003eA: No mechanical latch mechanism is specified. Shutdown and alarm latching functions are electronically maintained according to module logic conditions and reset commands.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module on the designated terminal base with all field power sources isolated before connector engagement.\u003c\/p\u003e\n\u003cp\u003eRoute overspeed input conductors separately from relay output wiring and high-current cabinet feeders to reduce inductive noise coupling into low-level shutdown circuits.\u003c\/p\u003e\n\u003cp\u003eUse shielded signal cable for overspeed and fault input wiring. Terminate cable shields at a single cabinet grounding reference point to avoid parallel ground return paths.\u003c\/p\u003e\n\u003cp\u003eVerify remote reset wiring polarity and terminal continuity before system energization. Unintended reset circuit activation can interfere with shutdown validation logic during commissioning procedures.\u003c\/p\u003e\n\u003cp\u003eInspect relay contact loading against the specified 250 VAC, 3 A resistive rating before connecting inductive loads such as trip solenoids or auxiliary contactors.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43421636788314,"sku":"1440-REX03-04RG","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1440-REX03-04RG2.jpg?v=1779853734","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1440-rex03-04rg-xm-442-overspeed-relay-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}