Waveshare 8-Ch Ethernet Relay Module (B) with Digital Input, Modbus RTU/Modbus TCP Protocol, PoE Port Communication, with Various Isolation and Protection Circuits, Industrial Grade Rail-Mount Case

Features flash-on, 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 Supports DC 7~36V wide range power input and PoE power supply
Supports relay control through MQTT protocol, comes with Alibaba Cloud MQTT application demo Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit
Adopts dedicated relay driver chip, with built-in flyback diode protection, for stronger and more stable driving ability Supports passive and active digital input, with bi-directional optocoupler isolation, built in debouncing algorithm. The relay supports digital input linkage control or toggle control