{"product_id":"allen-bradley-440r-n23114-guardmaster-msr126-1t-safety-relay","title":"Allen Bradley 440R-N23114 Guardmaster MSR126.1T Safety Relay","description":"\u003ch2\u003eAllen-Bradley 440R-N23114 Guardmaster MSR126.1T Safety Relay\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 440R-N23114 Guardmaster MSR126.1T Safety Relay\u003c\/strong\u003e is a compact safety monitoring relay designed for dual-channel safety circuits. It is used to monitor safety devices such as emergency stop pushbuttons, safety gate switches, and interlock circuits, providing monitored safety outputs and auxiliary contacts for machine safety control systems. The relay supports both automatic and manual reset modes and is housed in a narrow 22.5 mm DIN rail-mounted enclosure.\u003c\/p\u003e\n\u003ch3\u003eProduct 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-N23114\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 MSR126.1T Safety Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eGuardmaster MSR126R\/T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e24 V AC\/DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Inputs\u003c\/td\u003e\n\u003ctd\u003e2 N.C. Dual-Channel Inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImmediate Safety Outputs\u003c\/td\u003e\n\u003ctd\u003e2 N.O.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImmediate Auxiliary Outputs\u003c\/td\u003e\n\u003ctd\u003e2 N.O.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReset Type\u003c\/td\u003e\n\u003ctd\u003eAutomatic \/ Manual Reset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eFixed 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\u003eHousing Width\u003c\/td\u003e\n\u003ctd\u003e22.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\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\u003eEnclosure Protection\u003c\/td\u003e\n\u003ctd\u003eIP40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Protection\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Category\u003c\/td\u003e\n\u003ctd\u003eCategory 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSafety Monitoring Function\u003c\/h3\u003e\n\u003cp\u003eThe MSR126.1T is designed to monitor dual-channel safety devices and evaluate the consistency of both input channels before enabling the safety outputs. This architecture helps detect faults such as contact welding, wiring failures, or channel discrepancies within the safety loop.\u003c\/p\u003e\n\u003cp\u003eWhen a monitored safety device is actuated, the relay de-energizes its safety outputs to remove power from the controlled machine circuit. Operation can be restored through a configured reset sequence once the safety condition has been cleared.\u003c\/p\u003e\n\u003ch3\u003eInputs and Outputs\u003c\/h3\u003e\n\u003cp\u003eThe relay accepts two normally closed safety input channels, making it suitable for dual-channel emergency stop circuits and guard interlock switches. This configuration supports fault detection and helps maintain the integrity of the safety function.\u003c\/p\u003e\n\u003cp\u003eTwo immediate safety outputs are provided through normally open contacts intended for safety-related machine shutdown circuits. In addition, two auxiliary normally open contacts are available for status indication, control system signaling, or non-safety functions.\u003c\/p\u003e\n\u003ch3\u003eReset Configuration\u003c\/h3\u003e\n\u003cp\u003eThe MSR126.1T supports both automatic and manual reset operation. Manual reset is commonly used where operator acknowledgment is required before machine restart, while automatic reset may be suitable for applications where risk assessment permits automatic restoration after the safety device returns to a safe state.\u003c\/p\u003e\n\u003cp\u003eThe reset mode should be selected according to machine safety requirements and the applicable safety standard.\u003c\/p\u003e\n\u003ch3\u003eInstallation Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe relay is housed in a 22.5 mm wide enclosure designed for mounting on a standard 35 mm DIN rail. Fixed screw terminals provide secure field wiring connections for safety inputs, reset circuits, and output contacts.\u003c\/p\u003e\n\u003cp\u003eThe IP40 enclosure rating and IP20 terminal protection make the unit suitable for installation inside a properly rated control panel.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What safety devices can be connected to the 440R-N23114?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The relay is designed for dual-channel safety devices such as emergency stop pushbuttons, safety gate switches, and mechanical safety interlock contacts using two normally closed input channels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the relay support manual reset operation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. The MSR126.1T supports both automatic and manual reset modes, allowing the reset strategy to be selected according to the machine safety design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How many safety outputs are available?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The relay provides two immediate normally open safety outputs and two additional normally open auxiliary outputs.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67776497385546,"sku":"440R-N23114","price":4500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/8569\/3770\/files\/440R-S12R2_3.png?v=1791445406","url":"https:\/\/www.topbrandsplc.com\/products\/allen-bradley-440r-n23114-guardmaster-msr126-1t-safety-relay","provider":"Topbrands PLC Limited","version":"1.0","type":"link"}