{"title":"8-Channel Modbus RTU Latching Relay Module (C) with RS485, Rail-Mounted","handle":"8-channel-modbus-rtu-latching-relay-module-c-with-rs485-rail-mounted-ws-30460","url":"/products/8-channel-modbus-rtu-latching-relay-module-c-with-rs485-rail-mounted-ws-30460","description":"The 8-Channel Modbus RTU Latching Relay Module (C) is an industrial-grade relay controller with RS485 communication, designed for reliable automation in demanding environments. The latching relays retain their state after power loss, ensuring consistent operation without manual reset.\n\nCommunication and power are fully isolated with onboard opto-isolation, resettable fuse, TVS diode protection, and reverse-polarity protection. The module supports cascading up to 255 devices on a single RS485 bus via configurable addresses, and includes flash-on/flash-off timing control for automated relay scheduling.\n\nKey Features\n\n\nLatching Relays – Retain state after power loss, no manual reset required\n\nModbus RTU Protocol – Standard industrial protocol for seamless integration with PLCs and SCADA\n\nRS485 Communication – Opto-isolated with magnetic isolation for signal integrity\n\nCascadable – Configurable device address (1–255) for multi-module RS485 bus networks\n\nFlash-On/Flash-Off – Built-in timing control for automatic relay scheduling\n\nSurge Protection – Resettable fuse and TVS diode for lightning and ESD protection\n\nReverse-Polarity Protection – Safeguards against accidental wiring errors\n\nRail-Mounted Enclosure – ABS plastic case for DIN rail installation\n\n\nSpecifications\n\n\nRelay Rating: 10A at 250VAC / 30VDC\n\nContact Configuration: 1NO + 1NC per channel\n\nPower Supply: 7–36VDC\n\nDefault Baud Rate: 9600 bps (N, 8, 1)\n\nAvailable Baud Rates: 4800–256000 bps\n\nLED Indicators: 3× (STA, TXD, RXD)\n\nDimensions: 145 × 90 × 40 mm\n\nWeight: 233 g\n\n\nIdeal For\n\nIndustrial automation and control systems\nBuilding management and lighting control\nRemote relay switching via RS485 networks\nPLC and SCADA integration\n\n\n\nNote: Power supply not included. A 12V supply is recommended. A USB to RS485 converter is useful for testing and configuration.\n\n\nPackage Contents\n\n1× 8-Channel Modbus RTU Latching Relay Module (C)\n\n\nResources\n\nWaveshare Wiki – Modbus RTU Relay (C)\n","vendor":"Waveshare","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":464,"title":"Default Title","sku":"WS-30460","mpn":"30460","price":66.0,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}