<p>30-Ch Ethernet Relay Module, Modbus RTU\/Modbus Protocol, PoE Port Communication, With Isolation And Protection Circuits, Industrial Grade Rail-Mount Case.</p> <p>The Modbus POE ETH Relay 30CH is very easy to use. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for industrial control equipments and\/or applications with high communication requirements.</p> <p>Features flash-on, flash-off function, by passing argument to the , it is possible to turn on the relay for a while and then close it automatically.</p> <p>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.</p> <p>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.</p> <p>Note:Due to different production batches, there are differences in appearance, which does not affect the use.</p> <p>Colour:Black</p> <p>Material:Plastic</p> <p>Package Contents:</p> <p>1 x Ethernet Relay Module</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>