Micro USB 5V LCUS-4 4 Channel USB Relay Module Smart Switch Serial Port BSG

Features 1. Onboard 8-bit high performance microcontroller chip. 2. Onboard CH340 USB to serial port control chip. 3. Onboard power LED indicator and relay status LED indicator. 4. Support relay switch status checking, command: 0xFF. 5. On-board 5V, 10A/250VAC, 10A/30VDC 4 channel relay, long life of relay up to 100,000 times continuously. 6. Power supply voltage: 5V, support USB power supply and external power supply switching. 7. Output type: relay switch signal; 8. The module contain over-current protection and relay diode freewheel protection. Hardware Introduction Board size: 56*63mm 1. Interface on Board (1) External power supply port: connect DC5V power. Due to the limited USB output current, it is recommended to use external power supply when more than 2 relays are using; (2) USB power supply / external power supply switching: “Usb_P” for USB power supply, “Ext_P” for external power supply; (3) USB socket: USB connect / power supply; (4) Reserved USB interface. Interface on Relay COM1: Common port NC1: Normally closed port NO1: Normally open port COM2: Common port NC2: Normally closed port NO2: Normally open port COM3: Common port NC3: Normally closed port NO3: Normally open port COM4: Common port NC4: Normally closed port NO4: Normally open port 2. Instruction 2.1 Communication protocol The default baud rate is 9600 bps. Commands for relay operation or status inquiry (in HEX): Open 1st channel USB: A0 01 01 A2 Close 1st channel USB: A0 01 00 A1 Open 2nd channel USB: A0 02 01 A3 Close 2nd channel USB: A0 02 00 A2 Open 3rd channel USB: A0 03 01 A4 Close 3rd channel USB: A0 03 00 A3 Open 4th channel USB: A0 04 01 A5 Close 4th channel USB: A0 04 00 A4 Status inquiry: FF 2.2 Operation (1) Choose power supply ?USB power supply: Connect USB