{"title":"Industrial Modbus RTU 8-Channel Relay Module (D) with Digital Input and RS485 Interface","handle":"industrial-modbus-rtu-8-channel-relay-module-d-with-digital-input-and-rs485-interface","url":"/products/industrial-modbus-rtu-8-channel-relay-module-d-with-digital-input-and-rs485-interface","description":"The Industrial Modbus RTU 8-Channel Relay Module (D) is a reliable RS485-controlled relay module with 8 digital inputs. Designed for industrial applications, it supports the Modbus RTU protocol and includes multiple isolation protections like power, magnetic, and TVS diode isolation. It features an ABS rail-mounted enclosure for durability and easy installation, making it ideal for automation and industrial control systems.\nFeatures\n\n\nReliable Communication: RS485 with Modbus RTU support, configurable address (1-255), and multi-device cascading.\n\nMultiple Protections: Power isolation, magnetic isolation, TVS diode, and optocoupler isolation for noise immunity.\n\nFlexible Relay Control:\n8 relay outputs with a dedicated driver chip.\nFlash-on/flash-off functions for timed switching.\nDigital inputs support linkage or toggle control.\n\n\n\nWide Voltage Range: Operates on 7-36V DC.\n\nDurable Build: ABS rail-mount case for secure installation.\n\nLED Indicators: Status LEDs for MCU operation, TX, and RX communication.\n\nSpecifications\n\n\nPower: 7-36V DC\n\nInterface: RS485\n\nBaud Rate: 4800 - 256000 (default: 9600, N, 8, 1)\n\nRelay Outputs: 8 channels (≤10A 250VAC/30VDC)\n\nDigital Inputs: 8 (5-36V, NPN/PNP), optocoupler-isolated\n\nProtocol: Modbus RTU\n\nRS485 Address: 1-255\n\nIndicators:\n\nSTA: MCU status\n\nTXD: Transmit data\n\nRXD: Receive data\n\n\n\nSetup & Testing\n\n\nDriver Installation: Use provided FTDI drivers.\n\nRS485 Testing:\nConnect A-A, B-B.\nUse SSCOM or Modbus Poll software to send commands.\n\n\n\nCompatible with:\nRaspberry Pi (via RS485 CAN HAT, Python control)\nSTM32 (via RS485 CAN Shield, C control)\nArduino (via RS485 CAN Shield, Arduino IDE)\n\n\n\nApplications\n\nIndustrial automation\nSmart home systems\nRemote relay control\nEquipment monitoring\n\nResources & Support\n\n\nSoftware: SSCOM, Modbus Poll, SecureCRT\n\nExample Code: Python, C, Arduino\n\nFAQs:\nWorks with Windows, Mac, Linux, and Android.\nChange relay modes with Modbus commands.\nEnsure proper A-B wiring for RS485 stability.\n\n\n","vendor":"Waveshare","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":618,"title":"Default Title","sku":"WS-26517","price":69.07,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":110,"option1":"Default Title"}]}