DC 12V 2 Channel Serial Port RS232 Relay Module Board

This is DC 12V 2 Channel Serial Port RS232 Relay Module Board

Features:

• Interface: DB9 Female
• Easy to operate
• It supports 5V or 9-12V input voltage
• improved stability, with a capacitor filter circuit.
• Serial instructions are single-byte instructions

• 2 Channel Relay Module; 
• 2 Power input: DC 12V(8.5-13.5V).
• 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.
• PCB Size : 71x47mm

Control commands

Reading status(reading the satus of the relay (on/off))

0x55  0x56  0x00  0x00  0x00  0x00  0x00  0xAB

Relay open (issue this command,Relay open,COM connect to NO)

Channel 1 : 0x55  0x56  0x00  0x00  0x00  0x01  0x01  0xAD
Channel 2 : 0x55  0x56  0x00  0x00  0x00  0x02  0x01  0xAE

Relay close (issue this command,Relay close,COM disconnect NO,and COM connect to NC)

Channel 1 : 0x55  0x56  0x00  0x00  0x00  0x01  0x02  0xAE
Channel 2 : 0x55  0x56  0x00  0x00  0x00  0x02  0x02  0xAF

 Relay toggle(Relay status reversal,if COM connect to NO,this commands will Disconnect COM to NO and Reverse COM connect to NC,and vice versa)

Channel 1 : 0x55  0x56  0x00  0x00  0x00  0x01  0x03  0xAF
Channel 2 : 0x55  0x56  0x00  0x00  0x00  0x02  0x03  0xB0

Relay momentary(Relay COM connect to NO,disconnect after 200MS)

Channel 1 : 0x55  0x56  0x00  0x00  0x00  0x01  0x04  0xB0
Channel 2 : 0x55  0x56  0x00  0x00  0x00  0x02  0x04  0xB1

Once issue a command, will have return fame,7th byte of return fame mean the status of Relay.

Return command

Return relay open(return this command,mean COM connect to NO)

Channel 1 :  0x33  0x3C  0x00  0x00  0x00  0x01  0x01  0x71
Channel 2 :  0x33  0x3C  0x00  0x00  0x00  0x02  0x01  0x72

Return relay close(return this command,mean COM disconnect NO , and COM connect to NC)

Channel 1 : 0x33  0x3C  0x00  0x00  0x00  0x01  0x02  0x72
Channel 2 : 0x33  0x3C  0x00  0x00  0x00  0x02  0x02  0x73

Package Includes:

1 x DC 12V 2 Channel Serial Port RS232 Relay Module Board