{"product_id":"allen-bradley-440r-s12r2-guardmaster-safety-relay-module","title":"Allen-Bradley 440R-S12R2 Guardmaster Safety Relay Module","description":"\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 emergency stop and interlock monitoring within industrial safety control systems.\u003c\/p\u003e\n\u003ch3\u003eModel Classification and Nomenclature\u003c\/h3\u003e\n\u003cp\u003eThe 440R-S12R2 functions as a single-input safety relay module designed to replace the legacy 440R-J23106 unit. This hardware maintains a specific dual-channel universal input architecture to monitor machine guarding devices and verify safety circuit integrity before enabling control outputs.\u003c\/p\u003e\n\u003ch3\u003eHardware Operational Data\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e440R-S12R2\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen-Bradley\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOrigin\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.36 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 x 6 x 1.7 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Consumption\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.5 W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSupply Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 VDC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSafety Output (AC15)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e250 V \/ 1.5 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSafety Output (DC13)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 V \/ 2 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAllen-Bradley EtherNet\/IP and Logic Determinism\u003c\/h3\u003e\n\u003cp\u003eThe module facilitates integration within deterministic networks, ensuring that safety state transitions are executed within fixed timing windows. As a component of the Guardmaster series, it supports rigid compatibility with standard PLC backplane bus communication velocity and I\/O density scaling requirements. The firmware logic is hard-coded to maintain signal consistency, preventing unauthorized modification and ensuring that control responses to input faults remain predictable across distributed industrial control platforms.\u003c\/p\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1 x 440R-S12R2 Safety Relay unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 x Terminal block connector set\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 x Technical documentation sheet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation and Shielding Protocols\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eMounting: Secure the device to a standard 35 mm DIN rail. Maintain a minimum clearance of 5 mm from adjacent heat-generating components to allow for passive thermal dissipation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGrounding: Ensure the system common is bonded to the main protective earth (PE) bus. Use shielded, twisted-pair cabling for all input signal runs exceeding 3 meters to mitigate induced electromagnetic interference.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWiring: Observe local electrical codes for wire gauge selection. Ensure that wire terminations are tightened to the torque specifications provided in the terminal block documentation to prevent contact resistance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Performance Queries\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eDoes this module support hot-swapping?\u003c\/p\u003e\n\u003cp\u003eNo, the 440R-S12R2 does not support hot-swapping. The power supply must be disconnected before the module is removed or installed to prevent electrical arcing or damage to the backplane connectors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the primary function of the dual-channel input?\u003c\/p\u003e\n\u003cp\u003eThe dual-channel input monitors two signal paths for synchronization. If the signals do not transition within the specified time window, the module detects a fault and inhibits output activation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the auxiliary output be used for safety functions?\u003c\/p\u003e\n\u003cp\u003eNo, the auxiliary output is a solid-state signaling point intended for status monitoring and diagnostic reporting to a PLC, not for controlling hazardous energy.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow should the shielding be terminated?\u003c\/p\u003e\n\u003cp\u003eConnect the cable shield to a single point at the protective earth (PE) bus. Avoid creating ground loops by ensuring the shield is not grounded at both the sensor and the relay end.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if the supply voltage drops below 24 VDC?\u003c\/p\u003e\n\u003cp\u003eVoltage fluctuations below the rated operating threshold may result in intermittent contact state changes or relay chatter. Maintain a stable power source to ensure consistent safety circuit integrity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs there a specific configuration for the N.C. auxiliary output?\u003c\/p\u003e\n\u003cp\u003eThe N.C. output is fixed to mirror the status of the internal safety contacts. It provides a simple status signal and does not require software mapping within the host controller.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the impact of DC13 rated inductive loads?\u003c\/p\u003e\n\u003cp\u003eDC13 ratings define the switching capacity for inductive loads. Exceeding these limits can cause contact pitting and reduce the service life of the internal relay components.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan this unit be used with light curtains?\u003c\/p\u003e\n\u003cp\u003eYes, provided the light curtain outputs are compatible with the relay input voltage requirements and meet the necessary safety category for the specific application risk assessment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066474221741,"sku":"440R-S12R2","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/440R-S12R2_2.jpg?v=1783848888","url":"https:\/\/www.maxwellplc.com\/ga\/products\/allen-bradley-440r-s12r2-guardmaster-safety-relay-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}