{"product_id":"waveshare-modbus-rtu-relay-4ch-industrial-modbus-rtu-4-ch-relay-module-with-rs485-interface-30a-high-current-onboard-led-indicat","title":"Waveshare Modbus RTU Relay 4CH,Industrial Modbus RTU 4-ch Relay Module with RS485 Interface,30A High Current,Onboard LED Indicat","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNONE\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCondition\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNew\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003enone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eDrive IC\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cp\u003e\u003cspan class=\"product-info-title\" style=\"background-color:rgb(255, 255, 255);color:rgb(24, 24, 26);font-size:14px;font-family:Arial, sans-serif\"\u003eSKU\u003c\/span\u003e\u003cspan style=\"background-color:rgb(255, 255, 255);color:rgb(24, 24, 26);font-size:14px;font-family:Arial, sans-serif\"\u003e:30461\u003c\/span\u003e\u003cbr\u003e\u003cspan class=\"product-info-title\" style=\"background-color:rgb(255, 255, 255);color:rgb(24, 24, 26);font-size:14px;font-family:Arial, sans-serif\"\u003ePart No.\u003c\/span\u003e\u003cspan style=\"background-color:rgb(255, 255, 255);color:rgb(24, 24, 26);font-size:14px;font-family:Arial, sans-serif\"\u003e:Modbus RTU Relay 4CH\u003c\/span\u003e\u003cbr\u003e\u003cspan class=\"product-info-title\" style=\"background-color:rgb(255, 255, 255);color:rgb(24, 24, 26);font-size:14px;font-family:Arial, sans-serif\"\u003eBrand\u003c\/span\u003e\u003cspan style=\"background-color:rgb(255, 255, 255);color:rgb(24, 24, 26);font-size:14px;font-family:Arial, sans-serif\"\u003e:Waveshare\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cimg width=\"750\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/S5bb19a205bb849b5a4684affeb112b6cW.png\" slate-data-type=\"image\"\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial, sans-serif;font-size:1.5em;font-weight:400;letter-spacing:normal;text-align:center;white-space:normal;color:rgb(86, 86, 86);background-color:rgb(255, 255, 255);margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richWrap\" align=\"center\"\u003e\n\u003cdiv style=\"color:rgb(255, 255, 255);background-color:rgb(0, 0, 0);margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0.5em 0px 0px;padding-bottom:0px;padding-top:0.5em;padding-left:0px;padding-right:0px;overflow:hidden;box-sizing:border-box\" class=\"pdT\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eRS485 4-ch High Current Relay Module\u003c\/div\u003e\n\u003cdiv style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp style=\"color:rgb(255, 255, 255);background-color:rgb(101, 199, 50);margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0.3em 1.5em 0.3em 1em;padding-bottom:0.3em;padding-top:0.3em;padding-left:1em;padding-right:1.5em;display:inline-block;box-sizing:border-box\" class=\"richDesc hilitBlock2 round1234\"\u003eModbus RTU Protocol, Multi Isolation Protection Circuits, Safe \u0026amp; Stable \u0026amp; Reliable\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cspan\u003e \u003c\/span\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-1.jpg\" slate-data-type=\"image\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color:rgb(255, 255, 255);background-color:rgb(30, 28, 39);margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0.5em 0px 0px;padding-bottom:0px;padding-top:0.5em;padding-left:0px;padding-right:0px;overflow:hidden;box-sizing:border-box\" class=\"pdT\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eFeatures At A Glance\u003c\/div\u003e\n\u003cp style=\"text-align:left;margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"alignl pdTRBL\" align=\"left\"\u003eThis is an industrial 4-ch relay module controlled via RS485 bus, utilizing Modbus RTU protocol. It features embedded protection circuits such as power isolation, ADI magnetical isolation, resettable fuse, and TVS diode, etc. It also comes with an ABS enclosure. The Modbus RTU Relay 4CH is very easy to use. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for industrial control equipments and\/or applications with high communication requirement.\u003c\/p\u003e\n\u003cul style=\"text-align:left;color:rgb(255, 255, 255);margin:0px 0px 1em;margin-bottom:1em;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px 0px 0px 1em;padding-bottom:0px;padding-top:0px;padding-left:1em;padding-right:0px;list-style:outside disc;box-sizing:border-box\" class=\"alignl pdTRBL2\" align=\"left\"\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eConfigurable device address (1~255), multi devices can be cascaded on RS485 bus\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eFeatures flash-on, flash-off function, by passing arguments to the command, it is possible to turn on the relay for a while and then close it automatically\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eOnboard voltage regulator, supports 7V~36V wide voltage supply\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eOnboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eOnboard unibody ADI magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eOnboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, provides over-current\/over-voltage proof, lightningproof \u0026amp; anti-electrostatic\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eOnboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eAdopts dedicated relay driver chip, with built-in flyback diode protection, for stronger and more stable driving ability\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eReverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eHigh quality relay, contact rating: ≤30A 250V AC or ≤30A 28V DC\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003eRail-mounted ABS plastic enclosure, easy to install, safe to use\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:inherit;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cp\u003e3 LEDs for indicating the MCU status and signal transceiving status\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eSpecifications\u003c\/div\u003e\n\u003ctable style=\"border-collapse:collapse;font-size:0.7em;text-align:center;background-color:transparent;width:959.774px\" class=\"tabSty-2 mgnTB alignc\" align=\"center\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003ePower supply\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003e7~36V\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003eCommunication interface\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003eRS485\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003eBaudrate\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003e4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003eDefault communication format\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003e9600, N, 8, 1\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003eRelay channels\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003e4\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003eContact form\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003e1NO 1NC\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003econtact rating\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003e≤30A 250V AC or ≤30A 28V DC\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003eCommunication protocol\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003eStandard Modbus RTU protocol\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003eRS485 address\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003e1~255\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:center;background-color:rgb(244, 244, 244);border:1px solid rgb(220, 220, 220);padding:1em 0.7em 1em 0em\" align=\"center\"\u003e\u003cp\u003eLED indicators\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid rgb(220, 220, 220);padding:1em\"\u003e\u003cp\u003eSTA: MCU indicator, keeps flashing when the MCU is normally working\u003cbr\u003eTXD: TX indicator, lights up when sending data\u003cbr\u003eRXD: RX indicator, lights up when receiving data\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eInterfaces \u0026amp; Indicators\u003c\/div\u003e\n\u003cp style=\"margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richDesc\"\u003eWith Multiple LED Indicators, Easy To Monitor The Operating Status\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-3.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eHigh Current Screw Terminals\u003c\/div\u003e\n\u003cp style=\"margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richDesc\"\u003e30A high current relay, Onboard high quality screw terminals with covers, more convenient for high current wiring\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-5.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eHardware Analysis\u003c\/div\u003e\n\u003cp style=\"margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richDesc\"\u003eMultiple protections for safer and more reliable use\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-7.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color:rgb(245, 245, 245);margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0.5em 0px 0px;padding-bottom:0px;padding-top:0.5em;padding-left:0px;padding-right:0px;overflow:hidden;box-sizing:border-box\" class=\"pdT\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eEnclosure Design\u003c\/div\u003e\n\u003cp style=\"margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richDesc\"\u003eRail-mounted ABS plastic enclosure, easy to install, safe to use\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-9.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color:rgb(245, 245, 245);margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0.5em 0px 0px;padding-bottom:0px;padding-top:0.5em;padding-left:0px;padding-right:0px;overflow:hidden;box-sizing:border-box\" class=\"pdT\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eRS485 Communication\u003c\/div\u003e\n\u003cp style=\"margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richDesc\"\u003eConfigurable device address (1~255), multi devices can be cascaded on RS485 bus\u003c\/p\u003e\n\u003cp style=\"font-size:0.6em;font-weight:normal;margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richDesc subBlock\"\u003eIn case of many devices are cascaded, or communication distance is quite long, it is necessary to use RS485 repeaters\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-11.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003cp style=\"color:rgb(255, 0, 0);margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"note\"\u003efor reference only, the\u003cspan\u003e \u003c\/span\u003eUSB TO RS232\/485\/TTL\u003cspan\u003e \u003c\/span\u003econverter is Not included\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color:rgb(245, 245, 245);margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0.5em 0px 0px;padding-bottom:0px;padding-top:0.5em;padding-left:0px;padding-right:0px;overflow:hidden;box-sizing:border-box\" class=\"pdT\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eRelay connection\u003c\/div\u003e\n\u003cp style=\"margin:1em 0px;margin-bottom:1em;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richDesc\"\u003eContact rating of the onboard relay up to 30A 250V AC or 30A 28V DC\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-13.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color:rgb(245, 245, 245);margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0.5em 0px 0px;padding-bottom:0px;padding-top:0.5em;padding-left:0px;padding-right:0px;overflow:hidden;box-sizing:border-box\" class=\"pdT\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eApplications\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-15.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background-color:rgb(245, 245, 245);margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0.5em 0px 0px;padding-bottom:0px;padding-top:0.5em;padding-left:0px;padding-right:0px;overflow:hidden;box-sizing:border-box\" class=\"pdT\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eProduct show\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-17.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\"\u003e\n\u003cdiv style=\"font-size:2em;margin:1em 0px 0px;margin-bottom:0px;margin-top:1em;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;box-sizing:border-box\" class=\"richTitle\"\u003eOutline dimensions\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg style=\"border:0px;margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px;padding-bottom:0px;padding-top:0px;padding-left:0px;padding-right:0px;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/Modbus-RTU-Relay-4CH\/Modbus-RTU-Relay-4CH-details-size.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial, sans-serif;font-size:14px;font-weight:bold;letter-spacing:normal;text-align:start;white-space:normal;color:rgb(86, 86, 86);background-color:rgb(255, 255, 255);border-bottom:1px solid rgb(204, 204, 204);border-top:1px solid rgb(204, 204, 204);margin:0px 0px 1em;margin-bottom:1em;margin-top:0px;margin-left:0px;margin-right:0px;padding:15px 20px 15px 60px;padding-bottom:15px;padding-top:15px;padding-left:60px;padding-right:20px;box-sizing:border-box\" class=\"overviewSec\" align=\"start\"\u003eIndustrial Modbus RTU 4-ch Relay Module with RS485 Interface, 30A High Current, Onboard LED Indicators, Multi Isolation Protection Circuits, Industrial Grade Rail-Mount Case\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e","brand":"Yoeruyo","offers":[{"title":"Default Title","offer_id":55513886687531,"sku":"\u003cnone\u003e","price":185.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/5744\/8747\/files\/Sce464c65ef2d4cefa33bdacc6bcd8d5eX.webp?v=1789008233","url":"https:\/\/yoeruyo.com\/products\/waveshare-modbus-rtu-relay-4ch-industrial-modbus-rtu-4-ch-relay-module-with-rs485-interface-30a-high-current-onboard-led-indicat","provider":"Yoeruyo","version":"1.0","type":"link"}