RS485/TTL Modbus-Rtu 1/2/4/8 Channel Relay Module

1. Onboard mature and stable 8bit MCU and MAX485 level conversion chip
2. Communication protocol: support standard Modbus RTU protocol
3. Communication interface: support RS485/TTL UART interface
4. Communication baud rate: 4800/9600/19200, default 9600bps, support power-off save
6. Optocoupler input signal range: DC3.3-30V (this input cannot be used for relay control)
7. Output signal: relay switch signal, support manual, flash off, flash off mode, flash off/flash
The base number of the time delay is 0.1S, and the maximum flash-off/flash-off time can be set as 0xFFFF*0.1S=65535*0.1S=6553.5S
8. Device address: range 1-255, default 255, support power-off save
9. Onboard 1 way 5V, 10A/250V AC 10A/30V DC relay, can suck continuously
100,000 times, with diode effusion protection, short response time
10. On-board relay switch indicator
11.Supply voltage: DC7-24V, with input anti-reverse connection protection