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 1 Hardware Introduction Board size 56 63mmInterface 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 portNC1 Normally closed portNO1 Normally open portCOM2 Common portNC2 Normally closed portNO2 Normally open portCOM3 Common portNC3 Normally closed portNO3 Normally open portCOM4 Common portNC4 Normally closed portNO4 Normally open port2 Instruction 2 1 Communication protocolThe default baud rate is 9600 bps Commands for relay operation or status inquiry in HEX Open 1st channel USB A0 01 01 A2Close 1st channel USB A0 01 00 A1Open 2nd channel USB A0 02 01 A3Close 2nd channel US