{"product_id":"12-channel-rs485-modbus-rtu-relay-module-dc12-24v-din35-rail","title":"12-Ch RS485 Modbus RTU Relay Module DC 12\/24V DIN Rail","description":"\n\u003ch2\u003e12-Channel DC 12\/24V NPN Digital I\/O RS485 Relay Module with Modbus RTU – DIN35 Rail Mount\u003c\/h2\u003e\n\u003cp\u003eTake full control of your automation projects with this professional-grade \u003cstrong\u003e12-Channel RS485 Relay Module\u003c\/strong\u003e. Designed for industrial and hobbyist machine control applications including PLC systems and PTZ camera setups, this module delivers rock-solid switching performance via Modbus RTU communication over RS485. Available in DC 12V and DC 24V versions, it mounts neatly on a DIN35\/C45 rail inside its included UM72 green flame-retardant enclosure.\u003c\/p\u003e\n\u003cp\u003eMade in China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12 Photoelectric Isolation Input Ports\u003c\/strong\u003e – NPN low-level active; input\/output relationship configurable as associated (default) or non-associated via command\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e7 Flexible Control Commands\u003c\/strong\u003e – Open, Close, Momentary, Self-Locking, Interlock, Delay (up to 255 seconds), and Two-Channel Interlock\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModbus RTU Protocol\u003c\/strong\u003e – Supports function codes 03, 06, and 16; compatible with HyperTerminal and Modbus Poll software\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Device Network\u003c\/strong\u003e – Connect up to 64 devices in parallel on a single RS485 bus\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelectable Baud Rate\u003c\/strong\u003e – Jumper-configurable: 2400 \/ 4800 \/ 9600 (default) \/ 19200 BPS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Relay Contacts\u003c\/strong\u003e – Rated at 10A \/ 250VAC, 10A \/ 125VAC, 10A \/ 30VDC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN35 \u0026amp; C45 Rail Compatible\u003c\/strong\u003e – Ships with UM72 model enclosure (flame-retardant V0 grade) for clean panel installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Standby Draw\u003c\/strong\u003e – As low as 14 mA with all relays closed; scales predictably with active relays\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 12V or DC 24V (version-dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 relay output \/ 12 digital input\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUART \/ RS485, Modbus RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction Codes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e03, 06, 16\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Delay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e255 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Parallel Devices\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBaud Rates\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2400 \/ 4800 \/ 9600 \/ 19200 BPS\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10A \/ 250VAC; 10A \/ 30VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePCB Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180 × 72 × 20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWith DIN Rail Box\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e184 × 88 × 42 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePCB Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e190 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWith Box Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e318 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUM72, Green, Flame-Retardant V0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRail Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIN35 \/ C45\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\u003eBelow 50VAC \/ 75VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePLC machine control panels\u003c\/li\u003e\n  \u003cli\u003ePTZ camera and surveillance systems\u003c\/li\u003e\n  \u003cli\u003eIndustrial automation and building management\u003c\/li\u003e\n  \u003cli\u003eAccess control and door locking systems\u003c\/li\u003e\n  \u003cli\u003eSmart home and HVAC switching logic\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× 12-Channel RS485 Relay Module (with DIN Rail Box)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Due to lighting and screen variations, actual product color may differ slightly from images. Please allow 1–10 mm tolerance due to manual measurement.\u003c\/p\u003e\n\n\u003cp\u003eFor more on industrial relay and automation standards, refer to the \u003ca href=\"https:\/\/www.nist.gov\/topics\/manufacturing\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Manufacturing Standards\u003c\/a\u003e resource. Additional safety guidance for low-voltage industrial equipment is available from \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What communication protocol does this 12-channel relay module use?\u003c\/h4\u003e\n\u003cp\u003eA: This relay module communicates via RS485 using the Modbus RTU protocol, supporting function codes 03 (read), 06 (write single register), and 16 (write multiple registers). It is compatible with standard tools such as HyperTerminal and Modbus Poll software, making integration straightforward for PLC and automation engineers.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I connect multiple relay modules on the same RS485 bus?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The module supports up to 64 devices connected in parallel on a single RS485 bus, making it ideal for large-scale automation and machine control installations where many switching points are required.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the difference between the 12V and 24V versions?\u003c\/h4\u003e\n\u003cp\u003eA: Both versions offer identical relay channel counts, commands, and communication features. The only difference is the input supply voltage — choose DC 12V if your control panel runs on a 12V supply, or DC 24V for 24V industrial systems. The relay contact ratings (10A \/ 250VAC) remain the same across both versions.\u003c\/p\u003e\n\u003ch4\u003eQ: Does the module come with a DIN rail enclosure?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. Each module ships with a UM72 green flame-retardant V0-rated DIN rail enclosure that is compatible with standard DIN35 and C45 rails. The assembled unit measures 184 × 88 × 42 mm and weighs 318 g.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What communication protocol does this 12-channel relay module use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This relay module communicates via RS485 using the Modbus RTU protocol, supporting function codes 03 (read), 06 (write single register), and 16 (write multiple registers). It is compatible with standard tools such as HyperTerminal and Modbus Poll software, making integration straightforward for PLC and automation engineers.\"}}, {\"@type\": \"Question\", \"name\": \"Can I connect multiple relay modules on the same RS485 bus?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The module supports up to 64 devices connected in parallel on a single RS485 bus, making it ideal for large-scale automation and machine control installations where many switching points are required.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between the 12V and 24V versions?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Both versions offer identical relay channel counts, commands, and communication features. The only difference is the input supply voltage — choose DC 12V if your control panel runs on a 12V supply, or DC 24V for 24V industrial systems. The relay contact ratings (10A \/ 250VAC) remain the same across both versions.\"}}, {\"@type\": \"Question\", \"name\": \"Does the module come with a DIN rail enclosure?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. Each module ships with a UM72 green flame-retardant V0-rated DIN rail enclosure that is compatible with standard DIN35 and C45 rails. The assembled unit measures 184 × 88 × 42 mm and weighs 318 g.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Tools \u0026 Hardware\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/collections\/tools-hardware\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"12-Ch RS485 Modbus RTU Relay Module DC 12\/24V DIN Rail\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/products\/12-channel-rs485-modbus-rtu-relay-module-dc12-24v-din35-rail\"}]}\u003c\/script\u003e","brand":"Vue","offers":[{"title":"12V With Box","offer_id":48747217354944,"sku":"5:200004182#12V With Box","price":171.99,"currency_code":"USD","in_stock":true},{"title":"24V Only Board","offer_id":48747217387712,"sku":"5:200004763#24V Only Board","price":171.99,"currency_code":"USD","in_stock":true},{"title":"12V Only Board","offer_id":48747217420480,"sku":"5:144170022#12V Only Board","price":171.99,"currency_code":"USD","in_stock":true},{"title":"24V With Box","offer_id":48747217453248,"sku":"5:200004183#24V With Box","price":171.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/9338\/7968\/files\/Sc103fe1d4ab240fe9dd985d8ee6c799a2.webp?v=1786198751","url":"https:\/\/vueselect.com\/products\/12-channel-rs485-modbus-rtu-relay-module-dc12-24v-din35-rail","provider":"Vue","version":"1.0","type":"link"}