Skip to content
Modbus RTU 16-Channel Relay Module
Price:
Sale price
£44.30
Stock:
Quantity:
Awesome Extras
With 16 individual relay channels, this module provides an extensive capacity to manage many devices or equipment simultaneously. Whether you're controlling pumps, motors, heaters, or other machinery, the relay module offers a comprehensive solution for orchestrating various processes with precision. Equipped with built-in protection circuits including power supply isolation, ADI magnetical isolation, resettable fuse, and TVS diode, this module safeguards your equipment and data against power surges, electromagnetic interference, and short-circuits.
It supports the widely-used Modbus RTU protocol, allowing you to configure the device address within the range of 1 to 255. Furthermore, this module can be seamlessly integrated into existing setups, as multiple devices can be cascaded on an RS485 bus. This cascading capability simplifies complex installations and optimises communication across your network of devices.
Through the configurable device address and cascading functionality, you have the flexibility to create intricate automation systems tailored to your exact needs. Its extensive relay capacity, advanced protection features, Modbus RTU compatibility, configurable device address, and cascading capability make it an invaluable asset in managing complex processes while ensuring equipment longevity and data integrity.
Note: It is recommended to purchase the USB TO RS232/485/TTL or USB TO RS485 at the same time for easy testing.
Features
- Configurable device address (1~255), multi-devices can be cascaded on RS485 bus
- Features flash-on, and flash-off function, by passing argument to the command, it is possible to turn on the relay for a while and then close it automatically
- Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
- Onboard unibody ADI magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption
- Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightning proof & anti-electrostatic
- Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit
- Onboard dedicated relay driver chip, with built-in freewheeling diode protection, the driving ability is stronger and more stable
- Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection
- High-quality relay, contact rating: ≤10A 250VAC/30VDC
- Rail-mounted ABS case, easy to install, safe to use
- 3 LEDs for indicating the MCU status and signal transceiving status
Connection Example - AC 220V Device & A DC 30V Device
Specifications
| Operating Voltage | 5V |
| Communication Interface | RS485 |
| Baudrate | 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 |
| Default Communication Format | 9600, N, 8, 1 |
| Relay Channels | 16 |
| Contact Form | 1NO 1NC |
| Communication Protocol | Standard Modbus RTU protocol |
| RS485 Address | 1~255 |
| LED Indicators | STA: MCU indicator, keep flashing when the MCU normally working |
| TXD: TX indicator, lights up when sending data | |
| RXD: RX indicator, lights up when receiving data |
Resources
Package Contents
- 1x Modbus RTU Relay 16CH
- 1x US plug 5V 2A Power supply (with EU head adapter)
Payment & Accreditations
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Accreditations
4.50
Based on 2 reviews
Write Review
Sort
Clear Filters
Order By
Newest First
Oldest First
Most Popular
Highest Rating
Breakdown
1
1
0
0
0
Product Reviews
Modbus RTU 16-Channel Relay Module
A very nice bit of kit. It's always worth paying a bit more and buying Waveshare. The unit came well-packaged and with a UK PSU, not the US-EU one the listing mentions. The documentation on the Waveshare Wiki is first-class and, with the demo code, I was able to test the unit out in a matter of minutes. The demo code is also very useful for cut and paste to get your own code running. So far it has worked flawlessly so no complaints.
Was this review helpful?
2 years ago
Modbus RTU 16-Channel Relay Module
It's a decent Modbus relay but with one frustration which is worth mentioning. I wanted to use this with the 'minimalmodbus' python library in an application which included other RS485/modbus devices on a local network. The problem is that Waveshare have chosen command codes which don't correspond to the 'standard' set register write codes for modbus. This means that the Waveshare-specific commands are rejected by minimalmodbus as invalid. It's relatively easily solved by writing a dedicated Waveshare comms library, just a bit of a faff managing the two drivers on the same modbus to avoid collisions. All works fine though.
2 people found this review helpful.
Was this review helpful?
2 years ago
New content loaded
