{"product_id":"lcus-1-usb-relay-module-intelligent-control-switch","title":"LCUS-1 USB Relay Module 1\/2 Channel Intelligent Control Switch","description":"\u003ch2\u003eLCUS-1 USB Relay Module — Intelligent PC-Controlled Switching\u003c\/h2\u003e\n\u003cp\u003eTake full command of your electronic switching needs with the \u003cstrong\u003eLCUS-1 USB Relay Module\u003c\/strong\u003e. Featuring a stable, high-performance onboard microcontroller and the trusted \u003cstrong\u003eCH340 USB-to-serial chip\u003c\/strong\u003e, this compact PCB board lets you control relay on\/off states directly from your computer — simply by sending serial commands through any standard serial debugging software. Ideal for hobbyists, engineers, and automation enthusiasts alike.\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\u003eHigh-Performance Microcontroller:\u003c\/strong\u003e Onboard MCU delivers reliable, fast response to every command.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCH340 USB Control Chip:\u003c\/strong\u003e Industry-standard USB-to-serial converter for broad OS compatibility and easy driver installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual LED Indicators:\u003c\/strong\u003e Separate onboard LEDs for power status and relay state — always know your module's condition at a glance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Relay:\u003c\/strong\u003e Onboard 5V relay rated at \u003cstrong\u003e10A \/ 250VAC\u003c\/strong\u003e and \u003cstrong\u003e10A \/ 30VDC\u003c\/strong\u003e — built for long life with up to 10 million continuous switching cycles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In Protection:\u003c\/strong\u003e Overcurrent protection and relay diode freewheeling protection for enhanced circuit safety.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e Reliable performance from -40°C to +85°C.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomizable \u0026amp; Expandable:\u003c\/strong\u003e Supports multi-channel configurations for scalable automation projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eModel: LCUS-1\u003c\/li\u003e\n  \u003cli\u003eChannels: 1 or 2\u003c\/li\u003e\n  \u003cli\u003eControl Chip: CH340 USB-to-Serial\u003c\/li\u003e\n  \u003cli\u003eRelay Rating: 10A \/ 250VAC \u0026amp; 10A \/ 30VDC\u003c\/li\u003e\n  \u003cli\u003eOperating Temperature: -40°C to +85°C\u003c\/li\u003e\n  \u003cli\u003ePackage Type: DIP\u003c\/li\u003e\n  \u003cli\u003eBaud Rate: 9600\u003c\/li\u003e\n  \u003cli\u003eOrigin: Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLC USB Switch Communication Protocol\u003c\/h3\u003e\n\u003cp\u003eControl the relay via simple 4-byte HEX serial commands:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eData (1):\u003c\/strong\u003e Start identifier — default \u003ccode\u003e0xA0\u003c\/code\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eData (2):\u003c\/strong\u003e Channel address — default \u003ccode\u003e0x01\u003c\/code\u003e (first channel)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eData (3):\u003c\/strong\u003e Operation — \u003ccode\u003e0x01\u003c\/code\u003e = ON, \u003ccode\u003e0x00\u003c\/code\u003e = OFF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eData (4):\u003c\/strong\u003e Checksum\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOpen relay:\u003c\/strong\u003e \u003ccode\u003eA0 01 01 A2\u003c\/code\u003e\u003cbr\u003e\n\u003cstrong\u003eClose relay:\u003c\/strong\u003e \u003ccode\u003eA0 01 00 A1\u003c\/code\u003e\u003c\/p\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStep 1:\u003c\/strong\u003e Plug the USB relay module into your computer and install the CH340 USB-to-serial chip driver.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStep 2:\u003c\/strong\u003e Open a serial debugging tool (e.g., STC-ISP or SSCOM32). Set the baud rate to \u003cstrong\u003e9600\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStep 3 — Manual Send:\u003c\/strong\u003e Check \"HEX Send\", enter \u003ccode\u003eA0 01 01 A2\u003c\/code\u003e to open the relay or \u003ccode\u003eA0 01 00 A1\u003c\/code\u003e to close it, then click \"Send\".\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStep 4 — Auto Loop:\u003c\/strong\u003e In SSCOM32, open the \"Expansion\" panel, enter both commands, check \"HEX Send\" and \"Auto Loop\", then set your desired interval for fully automated switching.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What software do I need to control the LCUS-1 USB Relay Module?\u003c\/h4\u003e\n\u003cp\u003eA: You can use any standard serial port debugging software that supports HEX command input, such as STC-ISP or SSCOM32. Set the baud rate to 9600 and send the appropriate HEX commands (e.g., \u003ccode\u003eA0 01 01 A2\u003c\/code\u003e to open, \u003ccode\u003eA0 01 00 A1\u003c\/code\u003e to close) to control the relay.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the LCUS-1 relay module work on Windows, Mac, and Linux?\u003c\/h4\u003e\n\u003cp\u003eA: The module uses the CH340 USB-to-serial chip, which has drivers available for Windows, macOS, and most Linux distributions. Simply install the appropriate CH340 driver for your operating system and the module will be recognized as a virtual COM port.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What load can the LCUS-1 relay safely switch?\u003c\/h4\u003e\n\u003cp\u003eA: The onboard relay is rated for up to \u003cstrong\u003e10A at 250VAC\u003c\/strong\u003e or \u003cstrong\u003e10A at 30VDC\u003c\/strong\u003e. It is designed for up to 10 million switching cycles. Always ensure your connected load does not exceed these ratings for safe and reliable operation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I control multiple channels or devices with this module?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The LCUS-1 supports 1 or 2 channel configurations. For multi-channel use, you can address individual channels by changing the channel address byte in the HEX command (e.g., \u003ccode\u003e0x01\u003c\/code\u003e for channel 1, \u003ccode\u003e0x02\u003c\/code\u003e for channel 2). Multiple modules can also be daisy-chained for larger automation setups.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What software do I need to control the LCUS-1 USB Relay Module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"You can use any standard serial port debugging software that supports HEX command input, such as STC-ISP or SSCOM32. Set the baud rate to 9600 and send the appropriate HEX commands (e.g., A0 01 01 A2 to open, A0 01 00 A1 to close) to control the relay.\"}}, {\"@type\": \"Question\", \"name\": \"Does the LCUS-1 relay module work on Windows, Mac, and Linux?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module uses the CH340 USB-to-serial chip, which has drivers available for Windows, macOS, and most Linux distributions. Simply install the appropriate CH340 driver for your operating system and the module will be recognized as a virtual COM port.\"}}, {\"@type\": \"Question\", \"name\": \"What load can the LCUS-1 relay safely switch?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The onboard relay is rated for up to 10A at 250VAC or 10A at 30VDC. It is designed for up to 10 million switching cycles. 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