{"product_id":"rs422-to-ttl-converter-module-max490-15kv-esd-full-duplex","title":"RS422 to TTL Converter Module – MAX490, 15KV ESD, Full Duplex","description":"\n\u003ch2\u003eRS422 to TTL Signal Converter Module with MAX490 Chip \u0026amp; 15KV ESD Protection\u003c\/h2\u003e\n\u003cp\u003eUpgrade your serial communication setup with this compact, high-performance \u003cstrong\u003eRS422 to TTL bidirectional signal conversion module\u003c\/strong\u003e. Built around the industry-trusted \u003cstrong\u003eMAX490 chip\u003c\/strong\u003e, this full-duplex module delivers fast, reliable, and long-distance data transmission — perfect for engineers, makers, and electronics enthusiasts.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull-Duplex Two-Way Communication:\u003c\/strong\u003e RS422 interface with A, B, Y, Z lines supports ultra-long-distance transmission up to \u003cstrong\u003e1,000 meters\u003c\/strong\u003e, making it ideal for industrial and field applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e15KV ESD Protection:\u003c\/strong\u003e Built-in 15KV electrostatic discharge protection combined with a 10-ohm current-limiting resistor shields your devices from electrostatic and overcurrent damage — extending the life of your equipment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTVS Diode for Surge Protection:\u003c\/strong\u003e An onboard TVS (Transient Voltage Suppressor) diode guards against lightning strikes and voltage spikes. The integrated \u003cstrong\u003e120-ohm termination resistor\u003c\/strong\u003e also minimizes long-distance signal reflection interference for cleaner communication.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVisual Status Indicators:\u003c\/strong\u003e Dedicated \u003cstrong\u003epower and data transmission indicator LEDs\u003c\/strong\u003e provide at-a-glance monitoring of module activity — no guesswork needed during setup or troubleshooting.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMAX490 Chip Performance:\u003c\/strong\u003e This renowned chip delivers a maximum data transmission rate of \u003cstrong\u003e2.5 Mbps\u003c\/strong\u003e for fast, stable serial communication. The TTL side operates on a 5V DC power supply and is fully compatible with 5V logic-level signals (RXD\/TXD).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e MAX490\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCommunication Mode:\u003c\/strong\u003e Full Duplex, Two-Way (RS422 ↔ TTL)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Transmission Rate:\u003c\/strong\u003e 2.5 Mbps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Transmission Distance:\u003c\/strong\u003e 1,000 meters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESD Protection:\u003c\/strong\u003e 15KV\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTermination Resistor:\u003c\/strong\u003e 120 Ohm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent-Limiting Resistor:\u003c\/strong\u003e 10 Ohm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTTL Power Supply:\u003c\/strong\u003e 5V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLogic Signal Compatibility:\u003c\/strong\u003e 5V (RXD \/ TXD)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModule Color:\u003c\/strong\u003e Blue\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModule Dimensions:\u003c\/strong\u003e 5.0 cm × 2.7 cm (1.97\" × 1.06\")\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × RS422 to TTL Converter Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/22awg-glass-tube-fuse-holder-5x20mm-6x30mm-screw-type-10-pack\"\u003e10-Pack 22AWG Glass Tube Fuse Holder 5x20mm \u0026amp; 6x30mm Screw\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/100w-dual-port-car-charger-starlink-mini-fast-charging\"\u003e100W Dual-Port Car Charger for Starlink Mini – Fast Charging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/140w-usb-c-fast-charging-adapter-auto-power-off-overcharge-protection\"\u003e140W USB-C Fast Charger with Auto Power-Off Overcharge Protection\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on electronics safety and electrostatic discharge standards, visit the \u003ca href=\"https:\/\/www.nist.gov\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNational Institute of Standards and Technology (NIST)\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the RS422 to TTL converter module used for?\u003c\/h4\u003e\n\u003cp\u003eA: The RS422 to TTL converter module is used to bridge communication between RS422 serial devices and microcontrollers or single-chip systems that operate on TTL logic levels. It enables full-duplex, two-way data transmission over long distances — up to 1,000 meters — making it suitable for industrial automation, robotics, and embedded systems projects.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the MAX490 chip compatible with 3.3V logic systems?\u003c\/h4\u003e\n\u003cp\u003eA: This module's TTL side is designed to operate with a \u003cstrong\u003e5V DC power supply\u003c\/strong\u003e and is fully compatible with \u003cstrong\u003e5V logic-level signals\u003c\/strong\u003e (RXD\/TXD). If your system uses 3.3V logic, a level shifter may be required to ensure proper signal compatibility and avoid potential damage.\u003c\/p\u003e\n\u003ch4\u003eQ: How does the 15KV ESD protection benefit my setup?\u003c\/h4\u003e\n\u003cp\u003eA: The 15KV ESD (Electrostatic Discharge) protection helps safeguard both the module and any connected devices from sudden electrostatic events that can occur during handling or in electrically noisy environments. Combined with the TVS diode and 10-ohm current-limiting resistor, this module provides robust protection for long-distance or industrial deployments.\u003c\/p\u003e\n\u003ch4\u003eQ: What do the indicator lights on the module show?\u003c\/h4\u003e\n\u003cp\u003eA: The module features two indicator LEDs: one for \u003cstrong\u003epower status\u003c\/strong\u003e and one for \u003cstrong\u003edata transmission activity\u003c\/strong\u003e. These lights make it easy to confirm the module is powered up and actively sending or receiving data — especially useful during initial setup and debugging.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the RS422 to TTL converter module used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The RS422 to TTL converter module is used to bridge communication between RS422 serial devices and microcontrollers or single-chip systems that operate on TTL logic levels. It enables full-duplex, two-way data transmission over long distances — up to 1,000 meters — making it suitable for industrial automation, robotics, and embedded systems projects.\"}}, {\"@type\": \"Question\", \"name\": \"Is the MAX490 chip compatible with 3.3V logic systems?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This module's TTL side is designed to operate with a 5V DC power supply and is fully compatible with 5V logic-level signals (RXD\/TXD). If your system uses 3.3V logic, a level shifter may be required to ensure proper signal compatibility and avoid potential damage.\"}}, {\"@type\": \"Question\", \"name\": \"How does the 15KV ESD protection benefit my setup?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 15KV ESD (Electrostatic Discharge) protection helps safeguard both the module and any connected devices from sudden electrostatic events that can occur during handling or in electrically noisy environments. Combined with the TVS diode and 10-ohm current-limiting resistor, this module provides robust protection for long-distance or industrial deployments.\"}}, {\"@type\": \"Question\", \"name\": \"What do the indicator lights on the module show?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module features two indicator LEDs: one for power status and one for data transmission activity. These lights make it easy to confirm the module is powered up and actively sending or receiving data — especially useful during initial setup and debugging.\"}}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"Australia","offer_id":47710874009705,"sku":"200007763:201336099","price":17.04,"currency_code":"USD","in_stock":true},{"title":"france","offer_id":47710874042473,"sku":"200007763:201336342","price":17.81,"currency_code":"USD","in_stock":true},{"title":"United States","offer_id":47710874075241,"sku":"200007763:201336106","price":21.68,"currency_code":"USD","in_stock":true},{"title":"spain","offer_id":47710874108009,"sku":"200007763:201336104","price":14.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/Sfc26990bf16e4b5daf4a4c6f331d9254g.webp?v=1782061247","url":"https:\/\/oasis-select.com\/products\/rs422-to-ttl-converter-module-max490-15kv-esd-full-duplex","provider":"Oasis Select","version":"1.0","type":"link"}