Waveshare
Modbus RTU 16-Ch Relay Module, RS485 Interface, With Multiple Isolation Protection Circuits
$71.65
|
In stock
An industrial-grade 16-channel relay module controlled via RS485 bus using the Modbus RTU protocol. Built-in isolation protection circuits — including power ...
Get notified when back in stock
Estimated Delivery
Arrives
Disclaimer
Secure checkout
An industrial-grade 16-channel relay module controlled via RS485 bus using the Modbus RTU protocol. Built-in isolation protection circuits — including power supply isolation, ADI magnetic isolation, optocoupler isolation, resettable fuse, and TVS diode — ensure safe, stable, and reliable operation. Housed in a rail-mounted ABS enclosure for easy DIN rail installation.
Each relay channel supports flash-on and flash-off functions, allowing timed activation that automatically switches off after a set duration. Device addresses are configurable from 1–255, enabling multiple modules to be cascaded on a single RS485 bus.
Key Features
- 16 Relay Channels – Contact rating up to 10A 250VAC / 30VDC per channel
- Modbus RTU Protocol – Standard industrial communication via RS485
- Multiple Isolation Protection – Power supply isolation, ADI magnetic isolation, optocoupler isolation, resettable fuse, and TVS diode
- Cascadable – Configurable device address (1–255) for multi-device RS485 bus setups
- Flash-On / Flash-Off – Timed relay activation with automatic shut-off
- Reverse Polarity Protection – Prevents damage from incorrect wiring
- Dedicated Relay Driver – Built-in freewheeling diode protection for stable driving
- Rail-Mounted ABS Case – DIN rail compatible, safe and easy to install
- Status LEDs – 3 LEDs indicate MCU status and signal transceiving
Specifications
- Power Supply – 5V (included)
- Power Consumption – 0.26W standby, 4.7W with all relays active
- Interface – RS485
- Protocol – Modbus RTU (function codes 01, 03, 05, 06, 0F)
- Default Baud Rate – 9600 (supports 4800–256000)
- Parity – None, even, or odd (configurable)
- Relay Rating – ≤10A 250VAC / 30VDC
Ideal For
- Industrial automation and control systems
- Home automation with 220–240VAC appliance switching
- Multi-device RS485 networked relay control
- Applications requiring high communication reliability
Package Contents
- 1× Modbus RTU 16-Ch Relay Module
- 1× 5V 2A Power Supply (US plug with EU adapter)
Note: The included power supply has a US plug with an EU adapter. Australian customers may need a separate plug adapter. A USB-to-RS485 converter (not included) is required for PC-based testing and configuration.
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- DIN
- As a pin label, DIN stands for 'data in', the input through which a device receives serial data from a controller, as found on SPI displays, LED drivers and other serial modules. DIN can also refer to the German standards body of that name, as in a round multi-pin DIN connector or DIN-rail mounting.
- DIN rail
- DIN rail is a standard metal mounting rail used inside industrial electrical cabinets. When a product is DIN rail mountable, it can be clipped neatly alongside power supplies, relays and other automation hardware in a panel.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs and automation devices. When a product lists Modbus support, it is generally easier to integrate with existing industrial equipment that speaks the same protocol.
- Modbus RTU
- Modbus RTU is a version of the Modbus protocol that runs over serial wiring, commonly RS485. When a product lists Modbus RTU, it can connect to industrial sensors, meters or drives that use serial Modbus rather than Ethernet.
- Relay module
- A relay module uses an electrically controlled switch to let a low-power microcontroller control a separate circuit. It matters when switching devices that need different voltages or more current than a microcontroller pin can safely handle.
- reverse polarity protection
- A circuit feature that helps protect the board if power is connected the wrong way around. It matters because it can reduce the chance of damaging the breakout during wiring mistakes, especially in classroom or prototyping use.
- RS485
- RS485 is a robust differential serial communication standard often used in factories, farms and buildings where cables may be long or electrically noisy, and it can link many devices on a single pair of wires. When a product lists RS485, it can communicate with industrial sensors, meters and control equipment over longer distances than typical hobby serial wiring.
Find this product in
