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

>>>Manual: Click here to open <<< Description: - 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 mm Control Commands:
1. Reading status(reading the satus of the relay (on/off))
Channel 1: 55 56 00 00 00 01 00 AC
Channel 2: 55 56 00 00 00 02 00 AD
Channel 3: 55 56 00 00 00 03 00 AE
Channel 4: 55 56 00 00 00 04 00 AF
Channel 5: 55 56 00 00 00 05 00 B0
Channel 6: 55 56 00 00 00 06 00 B1
Channel 7: 55 56 00 00 00 07 00 B2
Channel 8: 55 56 00 00 00 08 00 B3 2. Relay open (issue this command, Relay open, COM connect to NO)
Channel 1: 55 56 00 00 00 01 01 AD
Channel 2: 55 56 00 00 00 02 01 AE
Channel 3: 55 56 00 00 00 03 01 AF
Channel 4: 55 56 00 00 00 04 01 B0
Channel 5: 55 56 00 00 00 05 01 B1
Channel 6: 55 56 00 00 00 06 01 B2
Channel 7: 55 56 00 00 00 07 01 B3
Channel 8: 55 56 00 00 00 08 01 B4