1、Can be pulled‑in continuously for 100,000 times, has diode pollution protection, and has a short response time. 2、With input anti‑reverse connection protection to prevent load damage due to wrong connection. 3、Increase the power‑down save function, improve the stability of the relay module. 4、Can realize 2‑channel input signal detection and 2‑channel relay output, which can be used for digital quantity detection or power control occasions. 5、Using PCB material, it has the dual function of conductive circuit and insulating bottom plate. Item Type: Relay Module Material: PCB Purpose: It Can Realize 2-Channel Input Signal Detection and 2-Channel Relay Output, Which Can Be Used for Digital Quantity Detection or Power Control Occasions. Communication Protocol: Support Standard RTU Protocol Communication Interface: Support RS485/TTL UART Interface Communication Baud Rate: 4800/9600/19200, Default 9600bps, Support Power-off Save Optocoupler Input Signal Range: DC3.3-30V (This Input Cannot Be Used for Relay Control) Output Signal: Relay Switch Signal, Support Manual, Flash off, Flash off Mode, Flash off Delay Base is 0.1S, The Maximum Flash off Time Can Be Set to OxFFFF x 0.1S-65535 x 0.1S- 6553.5S Device Address: Range 1-255, Default 255, Support Power-off Save 1 x Relay Module