UART 485/232/TTL Module

UART / TTL / RS232 / RS485 Serial Relay Module We provide a full series of serial port controlled relay modules covering TTL UART, RS232, and RS485 interfaces, widely used for smart home automation, industrial control, PLC connection, agricultural irrigation equipment, DIY electronic projects, and remote device switching control. All modules support standard Modbus RTU protocol, with stable signal transmission, anti-interference performance, and easy secondary development. 1. Different Communication Interface Types ✅ TTL UART Relay Module Direct compatible with MCU, Arduino, ESP32 and other mainboard TTL level signals. Short-distance & high-speed control, perfect for indoor DIY projects and embedded system local control. ✅ RS232 Relay Module Standard serial port for PC and device point-to-point communication. Simple wiring, plug-and-play, ideal for short-distance desktop debugging and small-scale equipment control. ✅ RS485 Relay Module Industrial differential transmission design, strong anti-interference. Support long-distance communication up to 1200m and multi-device bus networking. The best choice for outdoor industrial automation, irrigation systems, and centralized remote control. 2. Full Voltage Options for Global Application Our serial relay modules support multiple universal DC voltage versions to match different global power supply systems: 5V / 12V / 24V fixed voltage & 7-30V wide voltage optionalWide voltage models effectively solve unstable power supply problems in outdoor and industrial environments, suitable for household, commercial and industrial scenarios. 3. Rich Channel Specifications (1/2/4/8/12/24/32 Channel) We supply diversified channel options to meet different load control demands: 1CH / 2CH: Mini size, space-saving, perfect for single solenoid valve, water pump, light switch control. 4CH / 8CH: Multi-channel independent control, suitable for multi-group equipment linkage, irrigation zoning control, and industrial IO expansion. Each channel comes with independent indicator light, optocoupler isolation, and 10A high-current relay output, effectively isolating surge and static electricity to protect your main control equipment. 4. Core Advantages Compatible with Modbus RTU, support cus tom baud rate and address setting Optoelectronic isolation design, strong anti-interference, stable for long-term operation Support AT command delay setting, realize intelligent timing control Compact structure, support DIN rail mounting and PCB embedded installation High-temperature & vibration-resistant relay core, suitable for household and industrial scenarios Whether you need DIY small modules, household intelligent switches, or industrial long-distance centralized control equipment, our TTL/RS232/ RS485 relay modules can fully match your project requirements. For more specification, please contact through email: sales@hyhc.com.cn