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