8-Channel Relay Module with ESP32-S3 WiFi Ethernet W5500 and CAN
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8-channel ESP32-S3 WiFi Relay and Digital Input Module with CAN and Ethernet
An advanced industrial module based on the ESP32-S3 chip, offering 8 relay outputs and 8 isolated digital inputs. Equipped with a CAN interface and a 10/100Mbps Ethernet port, it provides a reliable solution for building automation, industrial systems, and AIoT projects.
Key features:
- Based on the microcontroller ESP32-S3 with a dual-core processor Xtensa 32-bit LX7 @ 240 MHz
- Integrated wireless connectivity Wi-Fi 2.4GHz and Bluetooth LE
- 8 high-quality relays, contact rating: ≤10A 250V AC / 30V DC
- 8 isolated digital inputs, supporting passive and active inputs (NPN/PNP)
- Built-in isolated interface CAN for industrial communication
- Built-in chip W5500 expanding with a 10/100Mbps Ethernet port
- Built-in protections: power isolation, digital isolation, relay optoisolation
- Powered via USB-C or screw terminal 7V~36V
- Built-in RTC chip and TF card slot
- LED indicators, buzzer, RESET and BOOT buttons
- ABS housing suitable for mounting on DIN rail
Built-in multi-level protection circuits
Multi-level protections, including power isolation and optoelectronic isolation, ensure safe and reliable operation of the module in demanding conditions.
Remote control via CAN, Bluetooth, and WiFi
Integrated relays with a rating of up to 10A allow for controlling home appliances at 220VAC or DC-powered loads below 30VDC.
Digital Inputs
Support for passive and active digital inputs with bidirectional optoelectronic isolation allows for flexible integration with various sensors and systems.
Board Overview
- ESP32-S3-WROOM-1U-N16R8: 16MB Flash and 8MB PSRAM
- 8-channel relays: ≤ 10A 250V AC / 30V DC
- Optoelectronic isolation: protection against interference
- RESET button
- PoE connector: optional (PoE version)
- BOOT button
- Power supply circuit
- Digital isolation
- Power isolation
- Bidirectional opto-isolation
- RTC battery holder
- Buzzer
- Digital input terminal
- Pin header: GPIO expansion
- LED indicators: PWR, RXD, TXD
- USB Type-C connector: programming and power
- WS2812 RGB LED: GPIO38
- Ethernet port
- External antenna connector: SMA female
- Power screw terminal: DC 7~36V
- CAN communication interface
- CAN terminator jumper: 120R
- Relay terminals
- Built-in TVS: surge protection
- CAN converter chip
- MP1605GTF-Z: DC-DC power module
- PCF85063ATL: RTC chip
- TCA9554PWR: GPIO expander
- W5500 Ethernet: SPI controller
- TF card slot
Dimensions
Technical specifications
- Microcontroller: ESP32-S3 (WROOM-1U-N16R8)
- Connectivity: WiFi 2.4GHz, Bluetooth 5, BLE
- Ethernet: W5500 (10/100Mbps)
- Interfaces: CAN, USB-C, TF slot
- Outputs: 8x Relay (1NO 1NC)
- Load: ≤10A 250V AC / 30V DC
- Inputs: 8x DI (5V~36V, isolated)
- Power supply: 7V ~ 36V DC
- RTC: PCF85063ATL
- Functions: Buzzer, RGB LED
- Housing: ABS, DIN rail mounting
- Dimensions: 175 × 90 × 40 mm
Kit contents
- ESP32-S3-ETH-8DI-8RO-C × 1
- Antenna 2.4G 4DB SMA × 1
- Screwdriver × 1
Relay selection guide
| Model | DI | Relay | RS485 | CAN | Ethernet | PoE | RTC | Buzzer | TF | Antenna | PIN header |
|---|---|---|---|---|---|---|---|---|---|---|---|
 ESP32-S3-Relay-6CH |
- | 6 | √ | - | - | - | - | √ | - | √ | 40PIN (Pico compatible) |
 ESP32-S3-ETH-8DI-8RO |
8 | 8 | √ | - | √ | - | √ | √ | √ | √ | 28PIN (2.54mm) |
 ESP32-S3-POE-ETH-8DI-8RO |
8 | 8 | √ | - | √ | √ | √ | √ | √ | √ | 28PIN (2.54mm) |
 ESP32-S3-ETH-8DI-8RO-C |
8 | 8 | - | √ | √ | - | √ | √ | √ | √ | 28PIN (2.54mm) |
 ESP32-S3-POE-ETH-8DI-8RO-C |
8 | 8 | - | √ | √ | √ | √ | √ | √ | √ | 28PIN (2.54mm) |
Safety
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