{"product_id":"rs485-can-dual-channel-relay-module-modbus-rtu-dc7-48v","title":"RS485 CAN Dual Channel Relay Module | Modbus RTU DC7-48V","description":"\n\u003ch2\u003eRS485 \/ CAN Dual Channel Relay Module with Modbus RTU Support\u003c\/h2\u003e\n\u003cp\u003eTake precise control of your automation and switching projects with this robust \u003cstrong\u003e2-channel RS485\/CAN Relay Module\u003c\/strong\u003e. Built around a stable 32-bit MCU and equipped with dedicated RS485 and CAN communication chips, this module supports the industry-standard \u003cstrong\u003eModbus RTU protocol\u003c\/strong\u003e for seamless integration into PLCs, microcontrollers, industrial control systems, and DIY electronics projects.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Power Supply Range:\u003c\/strong\u003e DC 7V–48V — compatible with a broad range of power sources\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual RS485 \u0026amp; CAN Interfaces:\u003c\/strong\u003e Flexible communication options for industrial and hobbyist applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModbus RTU Protocol:\u003c\/strong\u003e Standard communication for easy integration with SCADA, HMI, and automation controllers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-Channel Optocoupler Input:\u003c\/strong\u003e Signal range DC 3.3V–24V with full electrical isolation for safe signal detection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-Channel Relay Output:\u003c\/strong\u003e NO (Normally Open) and NC (Normally Closed) contacts — rated 10A\/250V AC or 10A\/30V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiode Discharge Protection:\u003c\/strong\u003e Built-in protection extends relay lifespan and shields your circuit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Endurance Relays:\u003c\/strong\u003e Rated for up to 100,000 continuous switching operations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Response Time:\u003c\/strong\u003e Minimal switching delay for real-time control applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfigurable Address \u0026amp; Baud Rate:\u003c\/strong\u003e Device address range 1–255 (default 255); default baud rate 9600 bps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e 80 × 56 mm — fits easily into enclosures and project boxes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 7V – 48V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptocoupler Input Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 3.3V – 24V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication Protocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eModbus RTU (RS485 \u0026amp; CAN)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDefault Baud Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9600 bps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDevice Address Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 – 255 (default: 255)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10A \/ 250V AC  |  10A \/ 30V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Endurance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100,000 operations\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBoard Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEU LVD Compliance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow voltage: Below 50V AC or 75V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eIdeal Use Cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIndustrial automation and PLC relay expansion\u003c\/li\u003e\n  \u003cli\u003eDigital input signal detection and monitoring\u003c\/li\u003e\n  \u003cli\u003eRemote power switching and load control\u003c\/li\u003e\n  \u003cli\u003eHome automation and smart control panels\u003c\/li\u003e\n  \u003cli\u003eRobotics and embedded systems prototyping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× RS485\/CAN Dual Channel Relay Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Due to monitor calibration differences, actual product color may vary slightly from images. Please allow ±1–10 mm variance due to manual measurement.\u003c\/p\u003e\n\n\u003cp\u003eFor more information on industrial control and electrical safety standards, visit the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Guidelines\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What communication interfaces does this relay module support?\u003c\/h4\u003e\n\u003cp\u003eA: This relay module supports both RS485 and CAN bus interfaces, and communicates using the standard Modbus RTU protocol. This makes it compatible with a wide range of PLCs, HMIs, microcontrollers, and SCADA systems.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the input voltage range for the optocoupler inputs?\u003c\/h4\u003e\n\u003cp\u003eA: The optocoupler inputs accept signal voltages from DC 3.3V to 24V, providing full electrical isolation between your control signal and the relay circuit — ideal for mixed-voltage environments.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this module switch AC loads?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. Each of the two relay channels is rated at 10A \/ 250V AC (and 10A \/ 30V DC), making it suitable for switching a variety of AC and DC loads in both residential and industrial control applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I configure the device address and baud rate?\u003c\/h4\u003e\n\u003cp\u003eA: The device address is configurable from 1 to 255 (factory default is 255), and the default communication baud rate is 9600 bps. Both can be adjusted via Modbus RTU commands to suit your network configuration.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What communication interfaces does this relay module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This relay module supports both RS485 and CAN bus interfaces, and communicates using the standard Modbus RTU protocol. 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