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Modbus RTU 4 Channel Relay Module 4CH Input Optocoupler Isolation RS485 MCU For Arduino

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                  Description:
                   
                  4 channel relay output (one normally open and one normally closed)
                  STM8S103F3 MCU
                  4 channel optocoupler isolation
                  4 Relays Close LED Indicators
                  Round DC interface and terminal DC interface. Convenient power wiring (supply voltage 12V)
                  4 channel input interface
                  RS485 communication interface.
                  A power indicator
                  A User LED Lamp
                  Reset button
                   
                  Package Included:

                  1 x Modbus RTU 4 channel Relay Module 

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