{"product_id":"rfid-125khz-em4100-card-reader-rs485-modbus-rtu-plc-agv","title":"RFID 125KHz EM4100 Card Reader RS485 Modbus RTU | IP67 PLC","description":"\n\u003ch2\u003eLIHTNE MB-125 RFID 125KHz Card Reader with RS485 Modbus RTU\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eLIHTNE MB-125\u003c\/strong\u003e is a rugged industrial-grade RFID card reader operating at \u003cstrong\u003e125KHz\u003c\/strong\u003e, fully compatible with \u003cstrong\u003eTK4100 and EM4100\u003c\/strong\u003e format tags. Designed for seamless integration into \u003cstrong\u003ePLC control systems, AGV (Automated Guided Vehicle) platforms\u003c\/strong\u003e, and other industrial automation environments, this reader communicates over \u003cstrong\u003eRS485\u003c\/strong\u003e using the industry-standard \u003cstrong\u003eModbus RTU protocol\u003c\/strong\u003e — no complex RF protocol knowledge required on your end.\u003c\/p\u003e\n\n\u003cp\u003eWith a wide DC input range of \u003cstrong\u003e7V–24V\u003c\/strong\u003e, built-in polarity reverse protection, an IP67 waterproof rating, and a wide operating temperature range of \u003cstrong\u003e-25°C to +85°C\u003c\/strong\u003e, this reader is built for demanding real-world deployments. The ABS + chrome-plated metal housing adds durability, while the M12 4-PIN connector provides reliable industrial connectivity.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Frequency:\u003c\/strong\u003e 125 KHz (EM4100 \/ TK4100 compatible)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRead Distance:\u003c\/strong\u003e 0–40 mm (varies by tag performance)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCommunication Interface:\u003c\/strong\u003e RS485\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtocol:\u003c\/strong\u003e Modbus RTU — easy PLC\/SCADA integration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e DC 7V–24V wide voltage input\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Consumption:\u003c\/strong\u003e Only 0.7W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCircuit Protection:\u003c\/strong\u003e Polarity reverse protection built-in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIP Rating:\u003c\/strong\u003e IP67 — dust-tight and waterproof\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -25°C to +85°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -40°C to +90°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 10%–90% RH (non-condensing)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESD Protection:\u003c\/strong\u003e Air discharge ±15kV \/ Contact discharge ±8kV\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrop Test:\u003c\/strong\u003e Survives 1.2m free fall\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 150g\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShell Material:\u003c\/strong\u003e ABS + chrome-plated metal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e M12 cable connector, 4-PIN\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSupported Tag Types\u003c\/h3\u003e\n\u003cp\u003eThis reader supports RFID 125KHz coin cards, ID round labels, and PVC-packaged EM4100 chips — making it highly versatile for access control, asset tracking, and industrial automation workflows.\u003c\/p\u003e\n\n\u003ch3\u003ePhysical \u0026amp; Environmental Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\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\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-25°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +90°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e10%–90% RH (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e150g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDrop Test\u003c\/td\u003e\n\u003ctd\u003e1.2m free fall\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESD Performance\u003c\/td\u003e\n\u003ctd\u003eAir discharge ±15kV; Contact discharge ±8kV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProtection Grade\u003c\/td\u003e\n\u003ctd\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\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\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eDC 7V–24V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.7W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCircuit Protection\u003c\/td\u003e\n\u003ctd\u003ePolarity reverse protection\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWorking Frequency\u003c\/td\u003e\n\u003ctd\u003e125 KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCard Type\u003c\/td\u003e\n\u003ctd\u003eEM4100 \/ TK4100 ID Card\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRead Distance\u003c\/td\u003e\n\u003ctd\u003e0–40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eRS485\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eModbus RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eLED Indicator Reference\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eIndicator\u003c\/th\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003cth\u003eState\u003c\/th\u003e\n\u003cth\u003eMeaning\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePower-On\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003eOn at power-up\u003c\/td\u003e\n\u003ctd\u003eAll LEDs off after 500ms\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStatus LED\u003c\/td\u003e\n\u003ctd\u003eGreen\u003c\/td\u003e\n\u003ctd\u003eSteady On\u003c\/td\u003e\n\u003ctd\u003eTag detected \/ card read\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStatus LED\u003c\/td\u003e\n\u003ctd\u003eGreen\u003c\/td\u003e\n\u003ctd\u003eFlashing\u003c\/td\u003e\n\u003ctd\u003eCommunication data being received\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eFor more information on RFID standards and industrial communication protocols, refer to the NIST RFID Technology Overview.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What RFID tag formats does the MB-125 125KHz card reader support?\u003c\/h4\u003e\n\u003cp\u003eA: The LIHTNE MB-125 RFID reader supports \u003cstrong\u003eTK4100 and EM4100\u003c\/strong\u003e format tags operating at 125KHz. Compatible tag form factors include coin cards, round ID labels, and PVC-packaged EM4100 chips — suitable for a wide variety of industrial and access control applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I integrate this RFID reader into a PLC or AGV system?\u003c\/h4\u003e\n\u003cp\u003eA: The reader communicates via an \u003cstrong\u003eRS485 interface using the Modbus RTU protocol\u003c\/strong\u003e, which is natively supported by most PLC platforms and SCADA systems. You simply connect the M12 4-PIN cable, power the unit with DC 7V–24V, and read tag data through standard Modbus register polling — no RF-level programming required.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum read distance of this 125KHz RFID card reader?\u003c\/h4\u003e\n\u003cp\u003eA: The read distance is \u003cstrong\u003e0 to 40mm\u003c\/strong\u003e. Actual range may vary depending on the type and quality of the RFID tag being used. For best results, use high-quality EM4100-compatible tags and ensure the tag is presented face-on to the read\/write head.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the MB-125 RFID reader waterproof or suitable for outdoor use?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The reader carries an \u003cstrong\u003eIP67 protection rating\u003c\/strong\u003e, meaning it is fully dust-tight and can withstand temporary submersion in water. It operates across a wide temperature range (-25°C to +85°C), making it well-suited for outdoor, factory floor, or other harsh-environment deployments.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What RFID tag formats does the MB-125 125KHz card reader support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The LIHTNE MB-125 RFID reader supports TK4100 and EM4100 format tags operating at 125KHz. Compatible tag form factors include coin cards, round ID labels, and PVC-packaged EM4100 chips — suitable for a wide variety of industrial and access control applications.\"}}, {\"@type\": \"Question\", \"name\": \"How do I integrate this RFID reader into a PLC or AGV system?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The reader communicates via an RS485 interface using the Modbus RTU protocol, which is natively supported by most PLC platforms and SCADA systems. You simply connect the M12 4-PIN cable, power the unit with DC 7V–24V, and read tag data through standard Modbus register polling — no RF-level programming required.\"}}, {\"@type\": \"Question\", \"name\": \"What is the maximum read distance of this 125KHz RFID card reader?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The read distance is 0 to 40mm. Actual range may vary depending on the type and quality of the RFID tag being used. For best results, use high-quality EM4100-compatible tags and ensure the tag is presented face-on to the read\/write head.\"}}, {\"@type\": \"Question\", \"name\": \"Is the MB-125 RFID reader waterproof or suitable for outdoor use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The reader carries an IP67 protection rating, meaning it is fully dust-tight and can withstand temporary submersion in water. It operates across a wide temperature range (-25°C to +85°C), making it well-suited for outdoor, factory floor, or other harsh-environment deployments.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"RFID 125KHz EM4100 Card Reader RS485 Modbus RTU | IP67 PLC\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/products\/rfid-125khz-em4100-card-reader-rs485-modbus-rtu-plc-agv\"}]}\u003c\/script\u003e","brand":"Vue","offers":[{"title":"Default Title","offer_id":48753002184896,"sku":"\u003cnone\u003e","price":117.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/9338\/7968\/files\/S54b079e640f14e6193b5d7bffdd027cei_e80bbfe6-942e-42bc-a8f6-48e42ca8e44f.webp?v=1786263542","url":"https:\/\/vueselect.com\/products\/rfid-125khz-em4100-card-reader-rs485-modbus-rtu-plc-agv","provider":"Vue","version":"1.0","type":"link"}