Product Details
This industrial-grade Modbus RTU 16-channel relay module with an RS485 interface is a top - choice for industrial control. It comes with multiple isolation protection circuits, including power supply isolation, ADI magnetical isolation, resettable fuse, and TVS diode, ensuring high safety and reliability. The module uses the Modbus RTU protocol and features a rail - mount ABS case for easy installation. Its fast communication, stability, and reliability make it perfect for applications with high communication requirements. Key features include a configurable device address (1 - 255) for cascading multiple devices on the RS485 bus, a flash - on and flash - off function, and onboard protections like unibody power supply isolation, ADI magnetical isolation, resettable fuse, TVS, optocoupler isolation, and a dedicated relay driver chip. It also has a reverse - proof circuit, high - quality relays with a contact rating of ≤10A 250VAC/30VDC, and 3 LEDs to indicate MCU and signal transceiving status. When many devices are cascaded or the communication distance is long, use RS485 repeaters. It can directly control 220VAC home appliances or devices below 30VDC. Check the wiki at www.waveshare.com/wiki/Modbus_RTU_Relay_16CH for more info. It's recommended to buy USB TO RS232/485/TTL or USB TO RS485 for easy testing. Package includes 1 Modbus RTU Relay 16CH and 1 US plug 5V 2A Power supply (with EU head adapter).
Using this Modbus RTU 16 - channel relay module is a breeze. First, set the device address according to your needs, which can be any number from 1 to 255. Then, connect it to the RS485 bus. If you have multiple devices, you can cascade them on the bus. When using the flash - on and flash - off function, just pass the right argument to the command, and the relay will turn on for a set time and then close automatically. For communication, if you are cascading many devices or the communication distance is long, don't forget to use an RS485 repeater. You can directly connect it to 220VAC home appliances or devices below 30VDC. As for power supply, it comes with a US plug 5V 2A power supply with an EU head adapter. When installing, use the rail - mount ABS case for an easy and safe setup. Remember, the USB to RS485 is not included, but it's recommended to buy one for testing. In terms of maintenance, keep the module clean and free from dust. Check the protection circuits regularly, like the resettable fuse and TVS diode, to ensure they are working properly. Avoid incorrect connections as the reverse - proof circuit is there to prevent damage, but it's better to be careful. And always refer to the wiki at www.waveshare.com/wiki/Modbus_RTU_Relay_16CH if you have any questions.
