Features: 1.POE PORT COMMUNICATE: 8 channel Ethernet relay module, RTU/TCP protocol, PoE port communicate, with various isolation and protection circuits, industrial grade rail mount case. 2.FLASHING FUNCTION: 8 channel ethernet relay module has the function of flashing on and flashing off, by passing the parameter to the command, it can turn on the relay for a period of time, and then turn off automatically. 3.STABILITY: Ethernet relay module is ideal for industrial control equipment and applications with high communicate requirements due to its fast communicate speed, stability, reliability and safety. 4.DC 7 TO 36V: PoE port ethernet relay module supports DC 7 to 36V wide range power input and PoE power supply, supports relay control via MQTT protocol, comes with MQTT application demo. 5.ANTI REVERSE CIRCUIT: On board optocoupler isolation prevents the relay from being interfered by high voltage circuits. Anti reverse circuit to prevent accidental damage to the circuit due to incorrect connection. specification:Item Type: Industrial Grade 8 Channel Ethernet Relay Module Material: ABS Power Supply: PoE Network Port, DC5.5x2.1 Power Connector or Terminal Block (7 to 36V) Communicate Interface: PoE Network Port, Support IEE802.3af Standards Number of Relay Channels: 8 Channels Contact Type: One Normally Open, One Normally Closed Protocol: RTU Protocol or TCP Protocol Indicator Light: RUN: RUN Indicator, Blinking for 2 Seconds After the Chip Is Working Normally. STA: MCU Indicator, Blinking When MCU is Working Normally TXD: Transmit Indicator, Light up When Sending Data. RXD: Receive Indicator, On When Receiving Data. PackageList:1 x IndustrialGrade8ChannelEthernetRelayModule