4 Channel RS232 Relay Board PC USB UART DB9 Remote Control Switch DC12V for Smart Home

Manual Click here to openFeatures This is4 Channel Relay Module DC 12V power supply voltage range 9 13V Standby current all relays closed 18MA 1 channelrelay open 50MA 2 channel relays open 81MA 3 channel relays open 110MA 4 channel relays open 141MA RS232 DB9 female interface Read open close Self locking click interlock 6 commands can satisfy most of the industrial control Specifications Model CE039 12VRated current 10ARated voltage DC12V3C rated voltage range below 36VRelay load current Max 10ARelay load voltage DC 1 100v or AC85 265vWeight 67gSize 8 5 x 4 7 x 1 8cm Control Commands 1 Reading status reading the satus of the relay on off 55 56 00 00 00 00 00 AB2 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 B03 Relay close issue this command Relay close COM disconnect NO and COM connect to NC Channel 1 55 56 00 00 00 01 02 AEChannel 2 55 56 00 00 00 02 02 AFChannel 3 55 56 00 00 00 03 02 B0Channel 4 55 56 00 00 00 04 02 B14 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 55 56 00 00 00 01 03 AFChannel 2 55 56 00 00 00 02 03 B0Channel 3 55 56 00 00 00 03 03 B1Channel 4 55 56 00 00 00 04 03 B2 5 Relay momentary Relay COM connect to NO disconnect aft