Product Information
Product Name: ESP32-S3-Relay-6CH
Model Number: ESP32-S3-Relay-6CH
Brand Name: Waveshare
Intended Use Classification
This product is intended for professional, industrial, commercial, and engineering
environments, including but not limited to:
Industrial Factory machine control
Industrial Remote equipment switching
Industrial IoT monitoring and control
Specifications
Microcontroller ESP32-S3-WROOM-1U
Wireless
communicatoin
2.4GHz WiFi (802.11 b/g/n)
、
BLE
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
DO
Contact rating ≤10A 30VDC
DO 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 × 90 × 40mm
Supporting Evidence of Industrial Use
1. Industrial DIN Rail Enclosure
The product is equipped with a standard DIN rail mount enclosure designed for
installation inside industrial electrical cabinets, distribution panels, and automation
control boxes. DIN rail mounting is commonly used in industrial environments rather
than residential consumer installations.
2. Wide Voltage DC Power Input (7~36V)
The device supports a 7V~36V DC input range, which is commonly required in
industrial power systems, control cabinets, vehicles, and field automation applications.
This differs from typical consumer products that generally use fixed low-voltage
adapters or USB power.
3. RS485 Interface for Modbus / PLC Systems
The product integrates an RS485 communication interface suitable for Modbus RTU
networks, PLC systems, industrial sensors, and remote I/O control systems. RS485 is
a standard industrial communication method widely used in automation systems.
4. Isolation Design for Industrial Environments
The device includes electrical isolation features such as optocoupler isolation, digital
isolation, and/or power isolation to improve reliability in noisy electrical
environments and to protect connected systems. Such protection is commonly
required for industrial applications.
5. Professional Terminal Wiring Installation
The product uses terminal block wiring for relay outputs and power connections.
Installation requires proper wiring knowledge and is intended to be performed by
qualified personnel or professional integrators, rather than general consumers.
6. Typical Industrial / Commercial Applications
Typical applications include:
Industrial Factory machine control
Industrial Remote equipment switching
Industrial IoT monitoring and control
Sales Channel Statement
This product is mainly supplied through B2B, industrial distribution, engineering
projects, OEM/ODM customers, and system integrator channels. It is not promoted as
a plug-and-play residential household consumer device.
Warning:
Changes or modifications to this unit not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
NOTE:
This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC Statement:
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.
The equipment complies with FCC Radiation exposure limit set forth for uncontrolled
environment. This equipment should be installed and operated with minimum
distance 20cm between the radiator and your body.
