R221A08 8CH Serial Port Relay Module DB9 UART RS232 Remote Control Switch 12V DC for Smart Home

Manual Click here to openDescription Power Input DC 12V 8 5 13 5V Standby Current all relays closed 18mA 1 relay open 51mA 2 relays open 82mA 3 relays open 112mA 4 relays open 142mA 5 relays open 170mA 6 relays open 198mA 7 relays open 227mA 8 relays open 251mA PC Serial ports RS232 Control Relay Power indicator LED lights Output indication relay output with LED indicators easy to see working status of the relay Communication protocol UART protocol communication baud rate 9600kpbs 8 data bits one stop bit no parity Each data frame contains eight bytes Two way data transmission Baud rate 9600kbps 8 data bits one stop bit no parity Each data frame contains eight bytes Size 94 x 62 x 19 mmControl Commands 1 Reading status reading the satus of the relay on off Channel 1 55 56 00 00 00 01 00 ACChannel 2 55 56 00 00 00 02 00 ADChannel 3 55 56 00 00 00 03 00 AEChannel 4 55 56 00 00 00 04 00 AFChannel 5 55 56 00 00 00 05 00 B0Channel 6 55 56 00 00 00 06 00 B1Channel 7 55 56 00 00 00 07 00 B2Channel 8 55 56 00 00 00 08 00 B32 Relay open issue this command Relay open COM connect to NO Channel 1 55 56 00 00 00 01 01 ADChannel 2 55 56 00 00 00 02 01 AEChannel 3 55 56 00 00 00 03 01 AFChannel 4 55 56 00 00 00 04 01 B0Channel 5 55 56 00 00 00 05 01 B1Channel 6 55 56 00 00 00 06 01 B2Channel 7 55 56 00 00 00 07 01 B3Channel 8 55 56 00 00 00 08 01 B43 Relay close issue this command Relay close COM disconn