Waveshare 6-Ch ESP32-S3 WiFi Relay Module Features

Onboard isolated RS485 interface, for connecting to various RS485 Modbus industrial modules or sensors
Onboard 40PIN header compatible with some Raspberry Pi Pico HAT, for expanding more functions such as RTC / CAN / RS232 / LoRa / sensor, etc.
Onboard USB Type-C port for power supply, firmware downloading and debugging
Onboard power supply screw terminal, supports 7~36V wide voltage input, suitable for industrial applications
Onboard optocoupler isolation to prevent interference from external high-voltage circuit connected to the relay
Onboard digital isolation to prevent interference from external signal
Onboard unibody power supply isolation, providing stable isolated voltage, no extra power supply required for the isolated terminal

Specifications

USB
Connector--USB Type-C
Power supply--5V
Functions--Power supply, USB communication, firmware downloading, etc.

ISOLATED RS485
Connector--Screw terminal
Direction control--Hardware automatic control
Protection--TVS diode, surge protection & ESD protection
Resistor-- Onboard reserved 120R matching resistor, NC by default, enabled via jumper

Relay
Contact rating: ≤10A 250VAC/30VDC
Relay channels--6
Contact form--1NO 1NC
Isolation --Optocoupler isolation

LED indicators
RGB--RGB colorful LED, supports programmable control for display color
PWR--Red power indicator, lights up when there is USB connection and voltage is detected
TXD --Green TX indicator, lights up when the RS485 port sends data
RXD --Blue RX indicator, lights up when the device port sends data back

power supply Screw terminal: Voltage range 7~36V
Appearance Enclosure : Rail-mount ABS protective case
Dimensions : 145 x 90 x 30mm