--- product_id: 619066527 title: "Industrial Modbus RTU 8-Ch Relay Module (D) with Digital Input and RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply" brand: "waveshare" price: "€ 100.55" currency: EUR in_stock: true category: "Waveshare" url: https://www.desertcart.es/products/619066527-industrial-modbus-rtu-8-ch-relay-module-d-with-digital store_origin: ES region: Spain --- # 10A max switching current 8-channel relay control Multi-layer isolation protection Industrial Modbus RTU 8-Ch Relay Module (D) with Digital Input and RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply **Brand:** waveshare **Price:** € 100.55 **Availability:** ✅ In Stock ## Summary > ⚙️ Power your automation with precision and bulletproof reliability! ## Quick Answers - **What is this?** Industrial Modbus RTU 8-Ch Relay Module (D) with Digital Input and RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply by waveshare - **How much does it cost?** € 100.55 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/619066527-industrial-modbus-rtu-8-ch-relay-module-d-with-digital) ## Best For - waveshare enthusiasts ## Why This Product - Trusted waveshare brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust Surge & Spike Defense:** Built-in resettable fuse, TVS, and optocoupler isolation ensure lightning-proof, over-voltage, and electrostatic protection. - • **Seamless Multi-Device Cascading:** Configurable device address (1~255) enables effortless RS485 bus expansion for complex industrial setups. - • **Power Isolation, No Extra Supply:** Onboard unibody power supply isolation delivers stable voltage without additional power sources—efficiency meets reliability. - • **Industrial-Grade Durability & Safety:** High-quality 10A relays in a DIN rail mount ABS enclosure with reverse-proof circuitry and multi-LED status indicators. - • **Smart Relay Control with Flash Function:** Flash-on/off commands allow timed relay activation, perfect for automated, precision-driven industrial processes. ## Overview The Waveshare Industrial Modbus RTU 8-Ch Relay Module (D) is a rugged, DIN rail-mountable automation component featuring 8 relay channels with 10A switching capacity, multi-layer isolation protections including optocoupler and magnetic isolation, and flexible RS485 interface supporting up to 255 devices. Designed for industrial environments, it offers surge protection, reverse polarity safeguards, and smart flash-on/off relay control, all powered by a 7~36V supply for stable, efficient operation. ## Description Waveshare Industrial Modbus RTU 8-Ch Relay Module (D) with Digital Input and RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply: desertcart.com: Industrial & Scientific ## Features - Configurable device address (1~255), multi devices can be cascaded on RS485 bus - Features flash-on, flash-off function, by passing argument to the command, it is possible to turn on the relay for a while and then close it automatically - Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal - Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption - Onboard 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 & anti-electrostatic - Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit - Adopts dedicated relay driver chip, with built-in flyback diode protection, for stronger and more stable driving ability - Supports passive and active digital input, with bi-directional optocoupler isolation, built in debouncing algorithm. The relay supports digital input linkage control or toggle control - Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection - High quality relay, contact rating: ≤10A 250VAC/30VDC. Rail-mounted ABS plastic enclosure, easy to install, safe to use. Multiple LEDs for indicating the MCU status and signal transceiving status ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CRKPYVSN | | Best Sellers Rank | #168,498 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #17 in IO Modules | | Brand Name | waveshare | | Coil Voltage | 36 Volts | | Connector Type | Screw | | Contact Current Rating | 10 Amps | | Contact Material | Steel | | Contact Type | Normally Closed | | Current Rating | 2 Amps | | Customer Reviews | 4.2 4.2 out of 5 stars (30) | | Included Components | Modbus RTU Relay (D) x1 Screwdriver x1 | | Manufacturer | Waveshare | | Maximum Switching Current | 10 Amps | | Maximum Switching Voltage | 36 Volts | | Minimum Switching Voltage | 7 Volts (DC) | | Model | Modbus RTU Relay (D) | | Mounting Type | DIN Rail Mount | | Operation Mode | Automatic | | Part Number | Modbus RTU Relay (D) | | Specification Met | Modbus Rtu Relay (D) | | Unit Count | 8.0 Count | ## Product Details - **Connector Type:** Screw - **Contact Material:** Steel - **Contact Type:** Normally Closed - **Current Rating:** 2 Amps - **Mounting Type:** DIN Rail Mount ## Images ![Industrial Modbus RTU 8-Ch Relay Module (D) with Digital Input and RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply - Image 1](https://m.media-amazon.com/images/I/616lKobvudL.jpg) ## Frequently Bought Together - Waveshare Industrial Modbus RTU 8-Ch Relay Module (D) with Digital Input and RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply - Waveshare USB to RS485 Converter with Protection Circuits, Compatible with TVs - USB to RS485 Converter Industrial Adapter Original FT232RL and SP485EEN Fast Communication Embedded Protection Circuits Resettable Fuse ESD Protection --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.es/products/619066527-industrial-modbus-rtu-8-ch-relay-module-d-with-digital](https://www.desertcart.es/products/619066527-industrial-modbus-rtu-8-ch-relay-module-d-with-digital) --- *Product available on Desertcart Spain* *Store origin: ES* *Last updated: 2026-07-21*