{"product_id":"omron-d4bl-1cra-d4bl-series-guard-lock-safety-door-switch","title":"Omron D4BL-1CRA D4BL Series Guard Lock Safety-Door Switch","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eEngineered for robust mechanical interlocking of industrial machine guards and safety doors, the \u003cstrong\u003eOmron D4BL-1CRA\u003c\/strong\u003e provides heavy-duty physical containment of hazards until safe operating conditions are met. This model features a highly secure \u003cstrong\u003emechanical lock\u003c\/strong\u003e combined with a 24 VDC solenoid-activated release, ensuring that access panels remain locked even during sudden power loss. With its rugged die-cast aluminum housing and an IP67 environmental protection rating, the device is optimized for reliable operations under demanding factory conditions.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Channel Detection:\u003c\/strong\u003e Equipped with an independent door open\/closed detection switch and lock monitor switch contacts for complete safety loop feedback.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFour-Position Adjustable Head:\u003c\/strong\u003e Head mounting direction can be rotated in four orientations (ships with right-side mounting) to accommodate diverse machine layouts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Locking Force:\u003c\/strong\u003e High mechanical locking retention force designed to prevent accidental or forced guard entry during hazardous machine cycles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDie-Cast Aluminum Housing:\u003c\/strong\u003e Heavy-duty metallic construction offers excellent resistance to impact, chemical washdowns, and physical wear.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConduit Access:\u003c\/strong\u003e Dual PG13.5 conduit entry points simplify routing and segregation of control and solenoid power wiring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003eRobot work cells and automated assembly lines requiring controlled access.\u003c\/li\u003e\n  \u003cli\u003eHeavy industrial machinery, including stamping presses, CNC enclosures, and packaging equipment.\u003c\/li\u003e\n  \u003cli\u003eHigh-inertia machine safety guarding where run-down times require delayed entry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eOmron\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eD4BL-1CRA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eProduct Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eGuard Lock Safety-Door Switch\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eInterlock Classification\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eType 2 (EN ISO 14119)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eCoding Level\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eLow Level coded (EN ISO 14119)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eLock Method\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eMechanical lock \/ 24 VDC solenoid release\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eBuilt-in Switch Configuration\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e1NC\/1NO (slow-action) + 1NC (slow-action)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eConduit Outlets\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003ePG13.5 (2-conduit style)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eHead Mounting Options\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e4 adjustable directions (Right-side mounted at shipping)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eMechanical Durability\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e1,000,000 operations minimum\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eElectrical Durability\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e500,000 operations minimum (10 A resistive load at 250 VAC)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eOperating Speed Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e0.05 to 0.5 m\/s\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eOperating Frequency Max.\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e30 operations per minute\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eDegree of Protection\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eIP67 (EN60947-5-1)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e0.8 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eShipping Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e2.0 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eContact Designation\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eAction Type\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eFunctional Circuit Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eDoor Open\/Closed Detection\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e1NC \/ 1NO\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eSafety circuit verification and non-safety auxiliary PLC state feedback\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eLock Monitor Detection\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e1NC\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eDirect safety circuit monitoring of the physical locking mechanism state\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eSolenoid Terminals\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eCoil Drive\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e24 VDC control input for coil energization to release mechanical lock\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe D4BL series comprises mechanical-lock models (such as this D4BL-1CRA) and solenoid-lock variants. Because the mechanical-lock design relies on internal spring tension to secure the guard and requires electrical power (24 VDC) to release, it is the safest option for systems with prolonged machine run-down times. Ensure that replacement units match this physical profile, as swapping to a solenoid-lock style changes the safety-fault state logic under loss-of-power scenarios.\u003c\/p\u003e\n\n\u003ch4\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTo prevent premature mechanical failure, the actuator key must enter the switch head smoothly without vertical or horizontal binding. Do not use the safety switch as a physical mechanical stop for the door or gate; separate hard stops must be installed to absorb the impact of door closure. Keep the auxiliary release key stored in a secure location accessible only to authorized maintenance personnel, as its use bypasses all safety locking functions.\u003c\/p\u003e\n\n\u003ch4\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eWhen wiring the PG13.5 conduits, use matching liquid-tight conduit fittings to maintain the IP67 integrity. Check that the terminal screws are torqued to the OEM-specified limits to prevent loose connections under high-vibration conditions. Verify that safety loop evaluation relays or safety PLCs monitor both channels to successfully detect any potential single-channel faults or short circuits.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 15px; margin-bottom: 1.5rem;\"\u003e\n  \u003cstrong style=\"color: #9b2c2c; display: block; margin-bottom: 5px;\"\u003eCRITICAL SAFETY WARNING\u003c\/strong\u003e\n  \u003cspan style=\"color: #9b2c2c; font-size: 14px;\"\u003eDisconnect all electrical power supplies to the safety switch, actuator mechanism, and machine control circuits before initiating installation, physical alignment, or internal wiring. Lockout\/tagout protocols must be strictly enforced. Residual kinetic hazards must be completely dissipated before testing.\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003col style=\"list-style: none; padding-left: 0; color: #2d3748;\"\u003e\n  \u003cli style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cspan style=\"display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; background-color: #2b6cb0; color: #ffffff; margin-right: 10px; font-weight: bold; flex-shrink: 0;\"\u003e1\u003c\/span\u003e\n    \u003cdiv\u003e\n      \u003cstrong\u003eMounting the Main Body:\u003c\/strong\u003e Securely bolt the switch body to the rigid, non-movable frame of the machinery using M5 screws. Ensure the mounting surface is flat to prevent mechanical distortion of the enclosure.\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cspan style=\"display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; background-color: #2b6cb0; color: #ffffff; margin-right: 10px; font-weight: bold; flex-shrink: 0;\"\u003e2\u003c\/span\u003e\n    \u003cdiv\u003e\n      \u003cstrong\u003eAligning the Actuator Key:\u003c\/strong\u003e Mount the corresponding actuator key (sold separately) to the moving door or guard. Align the key entry angle within the specified tolerance limits to prevent mechanical wear on the switch head entrance.\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cspan style=\"display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; background-color: #2b6cb0; color: #ffffff; margin-right: 10px; font-weight: bold; flex-shrink: 0;\"\u003e3\u003c\/span\u003e\n    \u003cdiv\u003e\n      \u003cstrong\u003eHead Orientation Adjustment:\u003c\/strong\u003e If needed, remove the four head screws, rotate the head to the desired mounting direction (front, back, left, or right), and securely re-fasten the screws.\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cspan style=\"display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; background-color: #2b6cb0; color: #ffffff; margin-right: 10px; font-weight: bold; flex-shrink: 0;\"\u003e4\u003c\/span\u003e\n    \u003cdiv\u003e\n      \u003cstrong\u003eConduit and Wire Termination:\u003c\/strong\u003e Run multi-core safety cabling through the PG13.5 conduit openings. Use insulated crimp terminals on the wire ends, torque all internal connection terminals, and hand-tighten the cover screws to maintain environmental seals.\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Omron","offers":[{"title":"Default Title","offer_id":53077936636267,"sku":"D4BL-1CRA","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/d4bl-1cra-qjexs05ydfq.png?v=1775733705","url":"https:\/\/www.plcprotech.com\/products\/omron-d4bl-1cra-d4bl-series-guard-lock-safety-door-switch","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}