{"product_id":"max3485-ttl-to-rs485-converter-module-mcu-multi-machine-communication","title":"MAX3485 TTL to RS485 Converter Module – MCU Multi-Machine","description":"\n\u003ch2\u003eMAX3485 TTL to RS485 Converter Module – Industrial-Grade Multi-Machine Communication\u003c\/h2\u003e\n\u003cp\u003eTake your microcontroller projects to the next level with the \u003cstrong\u003eMAX3485 TTL to RS485 Converter Module\u003c\/strong\u003e by ALLOYSEED. Engineered for engineers, makers, and industrial developers alike, this compact module delivers ultra-long-distance serial communication with rock-solid reliability. Whether you're building a multi-node sensor network, an industrial control system, or a Raspberry Pi\/Arduino project, this module bridges the gap between TTL logic levels and RS485 differential signaling seamlessly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Long Distance Transmission:\u003c\/strong\u003e Powered by a genuine MAX3485 chip, this module supports signal transmission over thousands of meters — ideal for large-scale deployments and industrial environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Voltage Compatibility:\u003c\/strong\u003e Supports both \u003cstrong\u003e3.3V and 5V\u003c\/strong\u003e signal control, making it compatible with a wide range of microcontrollers including Arduino, STM32, ESP32, Raspberry Pi, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e±15kV ESD Protection:\u003c\/strong\u003e Built-in electrostatic discharge protection keeps your circuit safe from unexpected voltage spikes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e500kbps Error-Free Data Rate:\u003c\/strong\u003e The slew-rate-limited driver minimizes EMI and signal reflections from improperly terminated cables, ensuring reliable data transmission up to 500kbps.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Device Bus Support:\u003c\/strong\u003e With 1\/4 unit load receiver input impedance, the bus supports \u003cstrong\u003e128+ devices\u003c\/strong\u003e simultaneously — perfect for multi-machine communication setups.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial Operating Temperature:\u003c\/strong\u003e Rated from \u003cstrong\u003e-40°C to +85°C\u003c\/strong\u003e, this module thrives in harsh industrial environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHot-Swappable Design:\u003c\/strong\u003e Unlike standard RS485 chips, the MAX3485 module can be hot-swapped without signal glitches or bus lockup.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdvanced Power Filtering:\u003c\/strong\u003e Uses tantalum electrolytic capacitors with dual high\/low frequency filtering for a clean, stable power supply.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOvervoltage Protection:\u003c\/strong\u003e Dual transient suppression diodes provide outstanding over-voltage protection for long-term reliability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSignal Integrity:\u003c\/strong\u003e 10Ω current protection resistor, large copper ground plane, and single-line RS485\/TTL signal routing all work together to maximize signal quality.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeveloper-Friendly Design:\u003c\/strong\u003e 2.54mm perforated soldering holes, M3 mounting screw holes, 120Ω terminal resistor (enable by shorting R16), angled header pins for easy testing, and built-in power + RXD\/TXD indicator LEDs.\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 MAX3485\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e TTL ↔ RS485\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupported Voltages:\u003c\/strong\u003e 3.3V \/ 5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Data Rate:\u003c\/strong\u003e 500 kbps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESD Protection:\u003c\/strong\u003e ±15kV\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBus Devices Supported:\u003c\/strong\u003e 128+\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTerminal Resistor:\u003c\/strong\u003e 120Ω (jumper-selectable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 53.00 × 22.00 × 16.00 mm (2.09 × 0.87 × 0.63 in)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × MAX3485 TTL to RS485 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 Type\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 – 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 RS485 communication standards and industrial serial interfaces, refer to the \u003ca href=\"https:\/\/www.nist.gov\/communications-technology-laboratory\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Communications Technology Laboratory\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eQ: What is the MAX3485 TTL to RS485 converter module used for?\u003c\/h4\u003e\n\u003cp\u003eA: The MAX3485 TTL to RS485 converter module is used to convert TTL-level serial signals (from microcontrollers like Arduino, STM32, ESP32, or Raspberry Pi) into RS485 differential signals. This enables reliable long-distance, multi-node serial communication — commonly used in industrial automation, sensor networks, and MCU development projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this module work with both 3.3V and 5V microcontrollers?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The MAX3485 module supports both 3.3V and 5V logic levels, making it broadly compatible with virtually all popular microcontrollers and development boards without the need for additional level-shifting components.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many devices can be connected to the RS485 bus using this module?\u003c\/h4\u003e\n\u003cp\u003eA: Thanks to its 1\/4 unit load receiver input impedance, this MAX3485 RS485 module supports \u003cstrong\u003emore than 128 devices\u003c\/strong\u003e on a single bus simultaneously, making it well-suited for large multi-machine communication networks.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I enable the 120Ω terminal resistor on this RS485 module?\u003c\/h4\u003e\n\u003cp\u003eA: Simply short the \u003cstrong\u003eR16 jumper\u003c\/strong\u003e on the board to enable the built-in 120Ω terminal resistor. This is recommended when the module is placed at either end of a long RS485 bus line to reduce signal reflections and improve transmission quality.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the MAX3485 TTL to RS485 converter module used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The MAX3485 TTL to RS485 converter module is used to convert TTL-level serial signals (from microcontrollers like Arduino, STM32, ESP32, or Raspberry Pi) into RS485 differential signals. This enables reliable long-distance, multi-node serial communication — commonly used in industrial automation, sensor networks, and MCU development projects.\"}}, {\"@type\": \"Question\", \"name\": \"Does this module work with both 3.3V and 5V microcontrollers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The MAX3485 module supports both 3.3V and 5V logic levels, making it broadly compatible with virtually all popular microcontrollers and development boards without the need for additional level-shifting components.\"}}, {\"@type\": \"Question\", \"name\": \"How many devices can be connected to the RS485 bus using this module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Thanks to its 1\/4 unit load receiver input impedance, this MAX3485 RS485 module supports more than 128 devices on a single bus simultaneously, making it well-suited for large multi-machine communication networks.\"}}, {\"@type\": \"Question\", \"name\": \"How do I enable the 120Ω terminal resistor on this RS485 module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Simply short the R16 jumper on the board to enable the built-in 120Ω terminal resistor. This is recommended when the module is placed at either end of a long RS485 bus line to reduce signal reflections and improve transmission quality.\"}}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"United States","offer_id":47710886396009,"sku":"200007763:201336106","price":22.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S1be1c6066fcf4e479ccd2a1041ce623as.webp?v=1782062533","url":"https:\/\/oasis-select.com\/products\/max3485-ttl-to-rs485-converter-module-mcu-multi-machine-communication","provider":"Oasis Select","version":"1.0","type":"link"}