Description
7-24V 4 Channel Input RS232/TTL UART RS485 Modbus RTU Relay Module 4 CH RS 485 Modbus RTU Relay Board
Product Description
1. Onboard mature and stable 8bit MCU and MAX3232 level conversion chip; 2, Communication protocol: support standard Modbus RTU protocol; 3. Communication interface: support RS232/TTL UART interface; 4. Communication baud rate: 4800/9600/19200, default 9600bps, support power-down save; 5. Optocoupler input signal range: DC3.3-24V (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, and the maximum flash-off/flash-off time can be set OxFFFF*0.1S=6553.5S; 7. Device address: range 1-255, default 255, support power-down save; 8. The baud rate, input signal, relay status, device address can be read by software/command; 9. On-board 4-way 5V, 10A/250V AC10A/30V DC relay, which can be pulled in 100,000 times continuously, with diode bleed protection and short response time; 10, Onboard relay switch indicator light; 11. Power supply voltage: DC7-24V,; 12. Board size: 93*87mm Board weight: 92g;
Specification
item
|
value
|
Protect Feature
|
Epoxy
|
Contact Load
|
Low Power
|
On board
|
8 bit mcu and max3232
|
Communication
|
Modbus RTU
|
Interface
|
RS232 TTL Uart
|
Baud rate
|
4800/9600/19200 bps
|
Optocoupler input signal range
|
DC 3.3V to 24V
|
Interface
1. Power input: DC 7-24V power input terminal; 2. Indicator light: four-way relay indicator light and power indicator light; 3. DC3.3-24V optocoupler signal input: IN1: Channel 1 positive IN2: Channel 2 positive IN3: Channel 3 positive IN4: Channel 4 positive GNDIN: Common terminal negative 4, RS232 communication interface; 5, GND, RXD, TXD: TTL level UART communication interface, GND, RXD, TXD are respectively connected to the GND, TXD, RXD of the external control terminal, support connection to 5.3V/5V external TTL serial port; 6, RS232 and TTL serial port selection, when using RS232 communication, TI is connected to TXD, RO is connected to RXD; when using TTL communication, both T and RO are connected to the NC terminal. 7. 4 independent relay switch signal output: NC,: Normally closed terminal, short-circuit with COM before the relay picks up, and hangs after picking up; COM: public terminal; NO: Normally open, the relay is suspended before closing, and short-circuited with COM after closing.