{"product_id":"dc-12v-fail-secure-electric-drop-bolt-lock-adjustable-time-relay","title":"DC 12V Fail Secure Electric Drop Bolt Lock – Time Relay \u0026 Key","description":"\n\u003ch2\u003eAsia-Teco DC 12V Fail Secure Electric Cylinder Drop Bolt Lock\u003c\/h2\u003e\n\u003cp\u003eUpgrade your access control system with the \u003cstrong\u003eAsia-Teco B9L Fail Secure Electric Cylinder Drop Bolt Lock\u003c\/strong\u003e. Engineered for reliability and versatility, this DC 12V electric lock is designed to keep doors securely latched when power is off (Normally Open \/ Fail Secure), making it ideal for security-critical applications in offices, apartment buildings, warehouses, and controlled-access areas.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFail Secure Operation:\u003c\/strong\u003e Door automatically locks when power is cut — ideal for safety and security installations where a locked state on power loss is required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Time Delay Relay:\u003c\/strong\u003e Built-in time relay with selectable delay settings of 0, 3, or 6 seconds, giving you full control over door re-locking timing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBevel Bolt \u0026amp; Mechanical Key Override:\u003c\/strong\u003e Stainless steel locking tongue (12.5mm diameter, 15mm ± 1mm pop-up length) with a bevel bolt for smooth door closure, plus a mechanical key for manual override in any situation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLED Status Indicators:\u003c\/strong\u003e Green LED indicates unlocked status; Red LED indicates locked status — at-a-glance monitoring for installers and security personnel.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoor Status Signal Output:\u003c\/strong\u003e Built-in door contact signal output allows integration with access control panels, alarm systems, or building management systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6-Cable Wiring:\u003c\/strong\u003e Comprehensive 6-cable harness for straightforward integration: Red (+) Positive, Black (–) Negative, plus additional cables for relay and door contact output.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Aluminum Alloy Construction:\u003c\/strong\u003e Lightweight yet robust housing built to withstand daily use across a wide operating temperature range of -10°C to +55°C.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE \u0026amp; FCC Certified:\u003c\/strong\u003e Meets international electromagnetic and safety compliance standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAsia-Teco\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB9L\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStarting Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1,300 mA (1.3A)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLock Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFail Secure (Normally Open — locks when power is off)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTime Delay Settings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 \/ 3 \/ 6 Seconds (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLocking Tongue\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStainless steel, 12.5mm diameter, 15mm ± 1mm pop-up\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLED Indicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen = Unlocked, Red = Locked\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-10°C to +55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable Count\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 Cables\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE, FCC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Asia-Teco B9L Electric Cylinder Drop Bolt Lock\u003c\/li\u003e\n  \u003cli\u003eMechanical key override\u003c\/li\u003e\n  \u003cli\u003e6-cable wiring harness\u003c\/li\u003e\n  \u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOffice and commercial building access control\u003c\/li\u003e\n  \u003cli\u003eApartment and residential entry doors\u003c\/li\u003e\n  \u003cli\u003eServer rooms and restricted-access areas\u003c\/li\u003e\n  \u003cli\u003eIntegration with keypads, card readers, and intercom systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor guidance on best practices in electronic access control and building security, visit the U.S. Consumer Product Safety Commission (CPSC) for product safety information.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does \"Fail Secure\" mean for this electric drop bolt lock?\u003c\/h4\u003e\n\u003cp\u003eA: Fail Secure (also called Normally Open or NO) means the door remains locked when power is off. The bolt only retracts and allows entry when power is applied. This is the preferred configuration for security-sensitive doors where you want the door to default to a locked state during a power outage.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I adjust the time delay on this electric bolt lock?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The Asia-Teco B9L features a built-in adjustable time relay with three selectable settings: 0, 3, or 6 seconds. This controls how long the bolt remains retracted (unlocked) after an access signal is triggered, giving you precise control over door re-locking timing.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this lock work with standard access control systems?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The lock operates on DC 12V, which is the standard voltage used by most access control panels, keypads, card readers, and intercom systems. The 6-cable harness and door status signal output contact make integration straightforward with a wide range of commercial and residential access control setups.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is there a mechanical key override in case of system failure?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The B9L includes a mechanical key override, allowing authorized personnel to manually lock or unlock the door independently of the electronic system — providing a reliable backup option during maintenance or emergencies.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does \\\"Fail Secure\\\" mean for this electric drop bolt lock?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Fail Secure (also called Normally Open or NO) means the door remains locked when power is off. The bolt only retracts and allows entry when power is applied. 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