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RS485 4-CH. Controller


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  • There are a number of sellers on Ebay that have 4 channel modules that ship from China. Most have relay outputs or other types of outputs. Not knowing where in the world you are makes it difficult to help you. The RS-485 is also known as the EIA-TIA 485 or TIA-485. See for example:
  • https://www.ebay.com/itm/164863960516?
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