Industrial 8-Channel ESP32-S3 WiFi Relay Module (Isolated RS485)

A highly integrated control hub designed to bridge the gap between heavy-duty hardware and the AIoT ecosystem. Powered by a built-in ESP32 S3 (Xtensa 32-bit LX7 dual-core processor), this all-in-one controller combines eight heavy-duty relays, eight digital inputs, and a robust suite of communication interfaces—including WiFi, Bluetooth LE, and Ethernet—into a single, ready-to-deploy package.

Managing multiple industrial devices and high-voltage appliances traditionally requires complex, space-consuming logic controllers and messy wiring. This module solves that by consolidating logic, switching, and networking onto one board. Whether you are building an automated factory dashboard, setting up smart agriculture monitoring, or needing to switch 240V AC mains equipment safely from an MQTT dashboard, this board gives you the processing headroom and physical interfaces to execute without relying on fragile breadboard setups.

Engineered for harsh environments and demanding tolerances, the board boasts comprehensive electrical protection, including onboard unibody power isolation, bi-directional optocouplers on all digital inputs, and TVS diodes to suppress surges on the RS485 lines. Designed to snap straight onto a standard 35mm DIN rail, the ABS enclosure keeps your connections safe from accidental shorts, whilst deep integration with the Arduino IDE ensures that getting your bespoke code up and running is a straightforward process.

Key Features

• Switch heavy loads reliably using 8 high-quality onboard relays, each rated for up to 10A up to 30V DC.
• Connect seamlessly to your existing network architecture with a built-in W5500 Ethernet chip, alongside integrated 2.4GHz WiFi and Bluetooth 5.0 LE (Note: A PoE-capable version is available for one-cable power and data compliance to IEEE 802.3af).
• Easily interface with standard industrial sensors and Modbus equipment using the dedicated, hardware-controlled RS485 screw terminal.
• Automate time-sensitive processes independently of network connectivity with the integrated PCF85063ATL RTC (Real-Time Clock) chip.
• Install quickly into existing switchboards and control cabinets with the included 35mm DIN rail-mountable ABS protective enclosure.
• Store local data logs, images, and configuration files using the onboard TF (microSD) card slot.
• Develop with familiar, well-documented tools using the widely supported ESP32-S3 architecture, perfectly matched for Arduino IDE development.

Technical Specifications