3pcs Modbus RTU 7-24V Relay Module RS485/TTL 1-way Input and Output with Anti-reverse Protection

Manual Click here to openProduct parameters 1 On board mature and stable 8bit MCU and MAX485 level conversion chip2 Communication protocol support standard Modbus RTU protocol3 Communication interface Support RS485 TTL UART interface4 Communication baud rate 4800 9600 19200 default 9600bps support power saving5 Photocoupler input signal DC3 3 30V This input cannot be used for relay control 6 Output signal relay switch signal support manual flash off flash off mode the delay base of flash off flash off is 0 1S the maximum settable flash off flash off time is 0xFFFF 0 1S 65535 0 1 S 6553 5S7 Device address 1 255 default 255 support power down save8 Onboard one 5V 10A 250V AC 10A 30V DC relay which can continuously attract 100 000 times with diode leakage protection short response time9 Onboard relay switch indicator10 Supply voltage DC7 24V with input anti reverse protection1 VCC GND DC7 24V power input2 IN GND DC3 3 30V optocoupler signal input3 A B RS485 communication interface A B are connected to A B 4 Relay switch signal outputNC normally closed end the relay is short circuited to COM before pull in and left floating after pull in COM public end NO Normally open the relay is suspended before the pull in and shorted to COM after the pull in 5 Relay indicator lit when the relay is on6 GND RXD TXD TTL level UART communication interface GND RXD TXD are respectively connected to GND TXD