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Buy Waveshare Industrial Modbus RTU 8 Channel Relay Module
Waveshare RTU 8-channel Relay Module RS485 (693)
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TIFRL0048
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Waveshare RTU 8-channel Relay Module RS485 (693)
Waveshare RTU 8-channel Relay Module RS485 (693)
Waveshare Industrial Modbus RTU 8 Channel Relay Module RS485
This is an industrial 8-channel modbus relay module that is controlled by an RS485 bus and uses the Modbus RTU protocol. This 8 channel RS485 relay module features embedded protection circuits like power isolation, ADI magnetic isolation, TVS diode protection, and more, ensuring reliable performance in demanding environments. It also includes a durable ABS enclosure for added safety.
The Modbus RTU relay is extremely simple to use. This modbus relay is an ideal choice for industrial control equipment and applications with high communication requirements due to its fast communication, stability, reliability, and safety. A reverse-proof circuit prevents the module from being damaged by incorrect wiring. The MCU status and signal transceiving status are indicated by 3 LEDs, they are:
LED indicators used:
- STA: MCU indicator, keep flashing when the MCU normally working
- TXD: TX indicator, light up when sending data
- RXD: RX indicator, light up when receiving data
Also, read our blog on Applications of Relay explaining 8 major applications, what is it, how does it works, its construction, and different types of relays.
Modbus Relay Module Applications:
This waveshare relay module is widely used in industrial automation, smart control systems, IoT-based monitoring, and remote device switching. As a robust RS485 relay module, it enables long-distance communication with multiple devices over a single bus, making it suitable for scalable automation setups. Whether you're building PLC-based systems or integrating with microcontrollers like Raspberry Pi or Arduino, this modbus relay module ensures efficient and reliable switching control.
Features
- Configurable device address (1~255) allows multiple devices to cascade on the RS485 bus.
- Flash-on, flash-off function enables automatic relay shutdown after a set time.
- Built-in isolated power supply ensures stable voltage without extra power.
- ADI magnetic isolation for high reliability, strong anti-interference, and low power consumption.
- TVS protection suppresses surge and transient spike voltage for lightning-proof and anti-static safety.
- Optocoupler isolation prevents interference from high-voltage circuits.
- Reverse-proof circuit protects against damage from incorrect wiring.
- High-quality relay with ?10A 250VAC/30VDC contact rating.
- Rail-mounted ABS plastic enclosure for easy installation and safety.
- Three LED indicators display MCU and signal transmission status.
What’s On Board:
Hardware Diagram of Industrial Modbus RTU 8-ch Relay Module
Applications:
- Industrial Control - Valve control, pump station control, unattended industrial control system
- Smart Home - Controlling appliances like air conditioner, access control, purifier, water heater, and so on
- Intelligent Agriculture - Controlling door curtain motor, air blower, and so on
- Breeding And Farming - Controlling ventilator, lighting, water supply, feeding system, and so on
Package Includes:
- 1 x Modbus RTU RS485 Relay Module
- 1 x Power adapter US plug 5V/2A 5.5/2.1
- 1 x Power adapter EU head
Specifications:
|
Power supply voltage |
5V Relay |
|
Communication interface |
RS485 |
|
Baudrate |
4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 |
|
Default communication format |
9600, N, 8, 1 |
|
Relay channel |
8 |
|
Contact form |
1NO 1NC |
|
Communication protocol |
Standard Modbus RTU protocol |
|
RS485 address |
1~255 |
|
RS485 terminal protection |
600W lightning-proof and surge-suppress, 15KV ESD protection (reserved 120R balancing resistor solder pads) |
| Dimensions (mm) | 145 x 90 x 40 (L x W x H) |
| Weight (gm) | 344 |
Specifications:
Power supply voltage
Specifications:
5V Relay
Specifications:
Communication interface
Specifications:
RS485
Specifications:
Baudrate
Specifications:
4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
Specifications:
Default communication format
Specifications:
9600, N, 8, 1
Specifications:
Relay channel
Specifications:
8
Specifications:
Contact form
Specifications:
1NO 1NC
Specifications:
Communication protocol
Specifications:
Standard Modbus RTU protocol
Specifications:
RS485 address
Specifications:
1~255
Specifications:
RS485 terminal protection
Specifications:
600W lightning-proof and surge-suppress, 15KV ESD protection (reserved 120R balancing resistor solder pads)
1. What is a Modbus RTU 8-channel relay module used for?
A Modbus RTU 8-channel relay module is designed for controlling multiple devices remotely through a Modbus RTU protocol. It can switch loads like lights, motors, and other appliances in automation systems. Widely used in industrial automation, building management, and smart home projects, it allows precise control and monitoring of connected equipment via a serial RS485 interface.
2. How does an RS485 Modbus relay module work?
An RS485 Modbus relay module operates by receiving commands from a master device via RS485 serial communication. Using the Modbus RTU protocol, it interprets the instructions to switch its relay channels on or off. This setup enables remote control and automation of various electrical devices, making it ideal for both industrial control systems and smart home applications.
3. How many devices can be connected to this Modbus RTU relay module?
Up to 32 devices can be connected in a Modbus RTU network using RS485. This includes relay modules, sensors, or controllers. The RS485 interface supports long-distance communication and multiple device control, making it suitable for large-scale automation setups. Always check the manufacturer’s specifications for maximum device support before installation.
4. What load can each relay channel handle in this module?
Each relay channel in a Modbus RTU module typically handles loads such as 250V AC 10A or 30V DC 10A, depending on the module model. This capacity allows it to control a variety of devices, including lights, fans, and motors. For safe operation, always verify your device’s voltage and current requirements against the relay module’s maximum ratings.
5. Can this RS485 relay module be used for home automation and industrial control?
Yes, this RS485 relay module is ideal for both home automation and industrial control. It enables remote switching of electrical devices, integration with smart control systems, and centralized automation management. Its reliable communication and robust design make it suitable for controlling lights, appliances, and machinery in diverse environments.
Shipping Policy
- Free Delivery on all Orders Above Rs 999/-
- All orders confirmed before 3:00 PM IST are shipped the same day, barring rare pickup delays on holidays or disturbances.
- Delivery time in Metro cities is 1–3 days; for other locations, it is 3–7 days. Delivery varies based on location and courier service.
Return & Refund Policy
- Return window: 7 days from receipt unless stated otherwise.
- No refunds or replacements after the return window.
- Returns are accepted only for non-working or damaged products.
- Initiate return requests via a Support ticket or contact us at +91-8123057137.
- Refunds are processed within 3–4 working days after inspection and approval.
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