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Modbus-Rtu 2 Channel Relay Module RS485/TTL Communication Output

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  • Model :
  • RKI-4450
₹918 (Incl. GST)
₹778 Excluding 18% GST
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This 2 channel Modbus RTU relay module equipped with stable 8-bit MCU and RS485 level communication chip,adopt standard MODBUS RTU format RS485 communication protocol. It can realize 2-bit input signal detection and 2-bit relay output. It can be used for digital detection or power control occasions.


Features:

  • Support Modbus RTU protocol

  • Support RS485/TTL UART interface

  • Output indicator in multi mode

  • Address can be set

  • Support input reverse connection protection

  • Relay switch output

  • Support parameter memory function

Specifications:

  • Item name: Dual Modbus Relay Module 

  • Work voltage:DC 7V~24V

  • Baud rate:4800/9600/19600bps(default 9600bps)

  • Optocoupler input signal:DC 3.3V~30V

  • Set address:1~255

  • Relay contorl mode: ON/OFF,Delay_ON,Delay_OFF mode

  • Delay time: 0~6553.5s 

  • Load: AC 250V 10A or DC 28V 10A

  • Protocol:Modbus RTU

  • Interface:RS485/TTL UART

  • Control channel: 2channel

  • Operating Temperature:-20℃~85℃

  • Operating Humidity:5%~95%RH

  • Module Size:85*49*19mm

Modbus RTU Command:

  1.   Suppose the device address is 0xFF so return 00 10 00 00 00 01 02 00 FF EB 80 and the 9th btye is device address.
  2.  Turn ON CH_1 Relay(Normal Mode):
    • Send:   FF 05 00 00 FF 00 99 E4
    • Return: FF 05 00 00 FF 00 99 E4
    • Note1:The 3rd and 4th byte are relay addresses.So it can be 0x0000,0x0001,0x0002,0x0003.
    • Note2:The 5th and 6th byte are relay data.0xFF00 means turn ON relay and 0x0000 means turn OFF relay.
  3.  Turn OFF CH_1 Relay(Normal Mode):
    • Send:   FF 05 00 00 00 00 D8 14
    • Return: FF 05 00 00 00 00 D8 14
  4. Turn ON CH_2 Relay(Normal Mode):
    • Send:   FF 05 00 01 FF 00 C8 24
    • Return: FF 05 00 01 FF 00 C8 24
  5. Turn OFF CH_2 Relay(Normal Mode):
    • Send:   FF 05 00 01 00 00 89 D4
    • Return: FF 05 00 01 00 00 89 D4
  6. Turn ON All relays:
    • Send:   FF 0F 00 00 00 08 01 FF 30 1D
    • Return: FF 0F 00 00 00 08 41 D3
  7. Turn OFF All relays:
    • Send:   FF 0F 00 00 00 08 01 00 70 5D
    • Return: FF 0F 00 00 00 08 41 D3
  8. Set device address to 0x01:
    • Send:   00 10 00 00 00 01 02 00 01 6A 00
    • Return: 00 10 00 00 00 01 02 00 01 6A 00
    •  Note: The 9th btye is device address.
  9. Set device address to 0xFF:
    • Send:   00 10 00 00 00 01 02 00 FF EB 80
    • Return: 00 10 00 00 00 01 02 00 FF EB 80
  10. Read device address:
    • Send:   00 03 00 00 00 01 85 DB
    • Return: 00 03 02 00 FF C5 C4
    • Note: The 5th btye is device address.
  11. Read relay status:
    • Send:   FF 01 00 00 00 08 28 12
    • Return: FF 01 01 01 A1 A0
    • Note:The 4th means which one relay.0 means OFF and 1 means ON.
  12. Read optocoupler input staturs:
    • Send:   FF 02 00 00 00 08 6C 12
    • Return: FF 02 01 01 51 A0
    • Note:The 4th means which one input.0 means low level signal input and 1 means high level signal input.
  13. Set baud rate 4800bps:
    • Send:   FF 10 03 E9 00 01 02 00 02 4A 0C
    • Return: FF 10 03 E9 00 01 C5 A7
    • Note:The 9th btye is baud rate value.0x02 is 4800bps.0x03 is 9600bps.0x04 is 19200bps.
  14. Set baud rate 9600bps:
    • Send:   FF 10 03 E9 00 01 02 00 03 8B CC
    • Return: FF 10 03 E9 00 01 C5 A7
  15. Set baud rate 19200bps:
    • Send:   FF 10 03 E9 00 01 02 00 04 CA 0E
    • Return: FF 10 03 E9 00 01 C5 A7
  16. Turn ON CH_1 Relay(2S Flashing Mode):
    • Send:   FF 10 00 03 00 02 04 00 04 00 14 C5 9F
    • Return: FF 10 00 03 00 02 A4 16
    • Note1:The 3rd and 4th byte are relay addresses.So CH1~CH4 can be 0x0003,0x0008,0x000D,0x0012.
    • Note2:The 10th and 11th byte are delay time in second.The minimum delay time is 0.1s.Relay will OFF after delay time.So the delay time in this command is : 0x0014*0.1=2S.
  17. Turn OFF CH_1 Relay(3S Flashing Mode):
    • Send:   FF 10 00 03 00 02 04 00 02 00 1E A5 99
    • Return: FF 10 00 03 00 02 A4 16
    • Note:Relay will ON after delay time.So the delay time in this command is : 0x001E*0.1=3S.



Downloads

Arduino Library



Modbus-Rtu 2 Channel Relay Module RS485/TTL Communication Output
Rs. 918 In Stock
This 2 channel Modbus RTU relay module equipped with stable 8-bit MCU and RS485 level communication chip,adopt standard MODBUS RTU format RS485 communication prot
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