ESP32-S3 WiFi Bluetooth Relay Board – RS485 CAN Type-C

ESP32-S3-RS485-CAN Industrial Control Board – 1-Channel WiFi & Bluetooth Relay

Take your industrial automation to the next level with the ESP32-S3-RS485-CAN Relay Board. Powered by the dual-core ESP32-S3 microcontroller running at up to 240 MHz, this compact DIN-rail-mounted control board brings together WiFi, Bluetooth 5 (LE), isolated RS485, and isolated CAN communication in a single robust package. Whether you're building smart factory systems, remote monitoring solutions, or IoT gateways, this board delivers the processing power and connectivity you need. Made in Mainland China.

Key Features

• ESP32-S3R8 Dual-Core Processor: Xtensa 32-bit LX7 architecture clocked at up to 240 MHz with powerful AI computing capabilities for demanding embedded workloads.
• 2.4GHz WiFi + Bluetooth 5 (LE): Integrated 802.11 b/g/n WiFi and Bluetooth 5 Low Energy for stable, long-range wireless connectivity.
• Isolated RS485 Interface: Hardware auto-direction control, TVS diode protection, surge and ESD protection, and a reservable 120Ω matching resistor (jumper-enabled) for reliable Modbus communication with industrial sensors and expansion modules.
• Isolated CAN Interface: Auto-detected hardware direction control, TVS diode, surge and ESD protection, and a reservable 120Ω matching resistor (jumper-enabled) for seamless CAN device integration.
• USB Type-C Port: Dual-purpose for both power delivery and firmware download/debugging — no separate programmer required.
• Wide Voltage Input: Terminal block power supply accepts 7V to 36V, perfectly suited for industrial environments.
• Onboard RTC Clock Chip: Supports scheduled/timed tasks without an external clock source.
• Digital Isolation: Protects the ESP32-S3 control chip from external signal interference, ensuring stable operation.
• Integrated Power Isolation: Provides a stable isolated voltage supply — no additional power supply needed for isolated terminals.
• Status Indicator LEDs: Red PWR indicator, green TX / blue RX indicators for RS485, and a flashing CAN activity indicator for at-a-glance monitoring.
• DIN Rail Enclosure: Rail-mounted protective enclosure for fast, secure installation in control cabinets.

Full Specifications

RS485 Interface Details

• Interface Type: Terminal blocks
• Direction Control: Automatically controlled via hardware flow settings
• Protection: TVS diode, surge & ESD protection
• Matching Resistor: 120Ω (default NC; enable via jumper cap)
• TX Indicator: Green LED
• RX Indicator: Blue LED

CAN Interface Details

• Interface Type: Terminal blocks
• Direction Control: Hardware auto-detection
• Protection: TVS diode, surge & ESD protection
• Matching Resistor: 120Ω (default NC; enable via jumper cap)
• Activity Indicator: Flashes during CAN data transmission

What's in the Box

• ESP32-S3-RS485-CAN Relay Board × 1
• SH1.0 4-pin connection cable (~150 mm) × 1
• Screwdriver × 1

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Frequently Asked Questions

Q: What programming environments are compatible with the ESP32-S3-RS485-CAN board?

A: The ESP32-S3-RS485-CAN board is compatible with the Arduino IDE, ESP-IDF, MicroPython, and other ESP32-S3-supported development frameworks. The onboard USB Type-C port enables direct firmware flashing and serial debugging without any additional programmer hardware.

Q: Do I need an external power supply for the isolated RS485 and CAN terminals?

A: No. The board features onboard integrated power isolation that generates a stable isolated voltage internally. You do not need to connect a separate power supply to the isolated RS485 or CAN terminals — simply power the board via USB Type-C (5V) or the terminal block input (7V–36V).

Q: Can I install this board in an industrial control cabinet?

A: Yes. The board ships inside a DIN rail-mounted protective enclosure, making it straightforward to mount directly onto standard 35mm DIN rails inside industrial control cabinets. The CE and RoHS certifications confirm its suitability for professional industrial environments.

Q: What is the maximum baud rate supported by the RS485 interface?

A: The RS485 interface supports standard Modbus baud rates used in industrial applications. The direction control is handled automatically by the hardware, simplifying multi-drop RS485 Modbus network configuration without requiring manual driver enable/disable logic in firmware.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.