Modbus RTU 4 Channel Relay Module with RS485/TTL UART, 1 Input 1 Output, 7-24...

ModBus RTU Relay HSC8D8D Module with RS485, RS232, DB9 Interfaces

Waveshare Industrial 8-Channel Ethernet Relay Module Modbus POE ETH Relay

Modbus RTU 8 Channel 12V Relays Module Featuring RS485 Input Output

Waveshare Industrial 8-Ch Ethernet Relay Module Modbus for Equipment Control

Industrial 8-Ch Ethernet Digital Input/Output Module Modbus RTU / TCP Protocol

8 Channel 12V Relays Module Modbus RTU With RS485 Communication For DIY Projects