Features 1、Not Easy to False Welding: Our relay module is well made, not easy to false welding, steady working process. 2、Continuous Closure: This 8 channel relay is continuously closed 100000 times, with strong driving capability and stable performance. 3、Equipped with Chip: This 8 channel relay is equipped with a mature and stable 8 bit MCU and RS485 level communication chip. 4、Optocoupler Input Signal Detection: The 8 channel relay can realize 1 channel optocoupler input signal detection and 1 channel relay output. 5、Use Scenario: Our relay module can be used for digital word quantity detection or power control applications. Specification Item Type: 8 Channel Relay Module Material: ABS On board mature and stable 8bit MCU and MAX485 level conversion chip Communication Protocol: Support standard RTU protocol Communication Interface: Support RS485 or TTL UART interface Communication Baud Rate: 4800 9600 19200, default 9600bps, support power down save Optocoupler Input signal range: DC3.3-30V (this input can not be used for relay control) Output Signal: Relay signal, support manual, light off, light off mode, light off Flashing light Delay base 0.1S, the maximum flash off or flash off time can be set to 0xFFFF x 0.1S equal 65535 x 0.1S equal 6553.5S Device Address: Range 1-255, default 255, support power down save On board relay switch indicator Package List 1 x 8 Channel Relay Module