---
product_id: 604392647
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: "S$118"
currency: SGD
in_stock: true
url: https://www.desertcart.sg/products/604392647-industrial-modbus-rtu-8-ch-relay-module-d-with-digital
store_origin: SG
region: Singapore
---

# 10A high-capacity relay contact RS485 multi-device cascade Multi-layer isolation & surge 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:** S$118
**Availability:** ✅ In Stock

## Summary

> ⚙️ Power your automation with precision and protection — don’t get left behind!

## 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?** S$118 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/604392647-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

- • **Plug & Play Industrial Design:** Rail-mounted ABS enclosure with multiple LED indicators for easy installation, status monitoring, and professional-grade durability.
- • **Robust & Reliable Relay Control:** High-quality relay supports up to 10A at 250VAC/30VDC with built-in flyback diode for stable, long-lasting performance.
- • **Seamless Multi-Device Networking:** Configurable device address (1~255) enables cascading multiple modules on a single RS485 bus for scalable industrial automation.
- • **Smart Digital Input with Debounce:** Supports both passive and active digital inputs with bi-directional optocoupler isolation and built-in debouncing for glitch-free control.
- • **Advanced Isolation for Maximum Safety:** Multi-layer isolation circuits including power, magnetic, optocoupler, and surge protection ensure ultra-reliable operation in harsh environments.

## Overview

The Waveshare Industrial Modbus RTU 8-Ch Relay Module (D) is a rugged, DIN rail-mountable automation component featuring configurable RS485 multi-device cascading, high-capacity 10A relay contacts, and comprehensive multi-layer isolation circuits. Designed for industrial environments, it offers surge protection, digital input debouncing, and a compact, easy-to-install ABS enclosure, making it an essential tool for scalable, reliable control systems.

## Description

Waveshare Industrial Modbus RTU 8-Ch Relay Module (D) With Digital Input And RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply

## 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 |
|---------------|-------|
| Manufacturer | Waveshare |
| Part number | Modbus RTU Relay (D) |
| Item Weight | 370 g |
| Product Dimensions | 17.5 x 9 x 4 cm; 370 g |
| Item model number | Modbus RTU Relay (D) |
| Wattage | 100 	Milliwatts |
| Item Package Quantity | 1 |
| Plug profile | DIN Rail Mount |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Connector type:** Wired connection
- **Contact material:** Silver Alloy
- **Contact type:** Normally Open
- **Current rating:** 10 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)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-19*