{"product_id":"max485-ttl-rs485-half-duplex-modbus-arduino","title":"MAX485 TTL to RS-485 Interface Module — Half-Duplex, Modbus RTU, Arduino","description":"\u003ch2\u003eMAX485 TTL to RS-485 Interface Module — Half-Duplex, Modbus RTU, Arduino\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eMAX485 module\u003c\/strong\u003e converts between TTL serial (UART) and RS-485 differential signals, enabling Arduino and other microcontrollers to communicate over RS-485 industrial networks at distances up to 1200m. RS-485 differential signaling provides excellent noise immunity in industrial environments, and the multi-drop bus topology supports up to 32 devices on a single twisted-pair cable. Compatible with Modbus RTU, DMX512, and other RS-485 protocols.\u003c\/p\u003e\n\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIC:\u003c\/strong\u003e Maxim MAX485\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMode:\u003c\/strong\u003e Half-duplex (transmit or receive, not simultaneously)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eData Rate:\u003c\/strong\u003e Up to 2.5Mbps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRange:\u003c\/strong\u003e Up to 1200m (at lower baud rates)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBus Nodes:\u003c\/strong\u003e Up to 32 devices per bus segment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupply Voltage:\u003c\/strong\u003e 3.3V – 5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eControl Pins:\u003c\/strong\u003e DE (Driver Enable) + RE (Receiver Enable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSignaling:\u003c\/strong\u003e Differential (A\/B lines) — excellent noise immunity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eArduino Wiring\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eVCC → 5V | GND → GND\u003c\/li\u003e\n  \u003cli\u003eDI (Data In) → Arduino TX pin\u003c\/li\u003e\n  \u003cli\u003eRO (Receiver Out) → Arduino RX pin\u003c\/li\u003e\n  \u003cli\u003eDE + RE → Arduino digital pin (tie together, HIGH=transmit, LOW=receive)\u003c\/li\u003e\n  \u003cli\u003eA\/B → RS-485 bus twisted pair\u003c\/li\u003e\n  \u003cli\u003eAdd 120Ω termination resistor at each end of the bus\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRS-485 vs UART vs I²C\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRS-485:\u003c\/strong\u003e 1200m range, 32 nodes, noise-immune differential — for industrial networks\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUART:\u003c\/strong\u003e ~15m range, point-to-point — for short-distance serial communication\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eI²C:\u003c\/strong\u003e ~1m range, multi-device — for on-board sensor communication\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArduino Modbus RTU master\/slave\u003c\/strong\u003e — communicate with industrial sensors, meters, and PLCs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilding automation RS-485 bus\u003c\/strong\u003e — HVAC, lighting, and access control networks\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnergy monitoring\u003c\/strong\u003e — smart meter and power analyzer communication\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDMX512 lighting control\u003c\/strong\u003e — stage and architectural lighting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-node sensor network\u003c\/strong\u003e — up to 32 Arduino nodes on one cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMAX485 half-duplex RS-485 module — 1200m range, 32 nodes, Modbus RTU compatible for Arduino industrial networking and long-distance serial communication.\u003c\/p\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":45670663815403,"sku":"","price":9.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/MAX485-RS-485-Interface-Module.jpg?v=1723009478","url":"https:\/\/keszoox.com\/products\/max485-ttl-rs485-half-duplex-modbus-arduino","provider":"Keszoox","version":"1.0","type":"link"}