{"product_id":"rs485-to-ttl-uart-converter-auto-flow-control-850m-3-3v-5v-128-nodes","title":"RS485 to TTL UART Converter Module — Auto Flow Control, 850m, 3.3V\/5V, 128 Nodes","description":"\u003ch2\u003eRS485 to TTL UART Converter Module — Auto Flow Control, 850m, 3.3V\/5V, 128 Nodes\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eRS485 to TTL UART converter module\u003c\/strong\u003e provides a transparent bidirectional bridge between RS485 differential bus and 3.3V\/5V TTL UART — with automatic flow control that switches between transmit and receive without any direction control pin from the MCU. Industrial-grade design with lightning protection, 120Ω on-board termination resistor, and support for up to 128 devices on one bus. Transmission distance up to 850m (recommended within 800m). Compatible with Arduino, ESP32, STM32, and Raspberry Pi UART.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e RS485 (differential) ↔ TTL UART (3.3V\/5V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Control:\u003c\/strong\u003e Automatic (no DIR pin needed)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 3.3V or 5V (dual compatible)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSignal Level:\u003c\/strong\u003e 3.3V and 5V compatible\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission Distance:\u003c\/strong\u003e Up to 850m (use within 800m recommended)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBus Nodes:\u003c\/strong\u003e Up to 128 devices per bus\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTermination:\u003c\/strong\u003e On-board 120Ω matching resistor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Lightning\/surge protection on RS485 bus pins\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndicators:\u003c\/strong\u003e RXD and TXD signal LEDs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePCB:\u003c\/strong\u003e 0.8mm thickness, half-hole process, large copper pour\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e 2.54mm pitch standard headers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRS485 vs RS232 vs TTL UART\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRS485 (this module):\u003c\/strong\u003e Differential pair, up to 850m, multi-drop (128 nodes), noise immune — for industrial networks\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRS232:\u003c\/strong\u003e Single-ended, up to 15m, point-to-point — for PC serial port communication\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTTL UART:\u003c\/strong\u003e Single-ended, short distance, 1:1 — for MCU-to-MCU on same board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eModbus RTU master\/slave communication\u003c\/li\u003e\n  \u003cli\u003eIndustrial sensor network (temperature, flow, pressure)\u003c\/li\u003e\n  \u003cli\u003eArduino\/ESP32 to RS485 device interface\u003c\/li\u003e\n  \u003cli\u003eBuilding automation (BACnet MS\/TP)\u003c\/li\u003e\n  \u003cli\u003eLong-distance serial data transmission\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eRS485 to TTL UART converter — auto flow control, 850m, 128 nodes, lightning protection, 3.3V\/5V for Modbus RTU and industrial serial network projects.\u003c\/p\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991460335851,"sku":"\u003cnone\u003e","price":8.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/i11-rs485-to-ttl-uart-converter-module-automatic-flow-control.webp?v=1761794843","url":"https:\/\/keszoox.com\/products\/rs485-to-ttl-uart-converter-auto-flow-control-850m-3-3v-5v-128-nodes","provider":"Keszoox","version":"1.0","type":"link"}