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RS485/RS422 Transreceiver

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I know that.I have connected it as a RS485 shield and it works well.But now I want to connect it as 422 shield since in the datasheet it is written as RS485/RS422 trans-receiver. Will I be able to use the DB9 connector pins to act as RS422?

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You must mean the datasheet of the chip MAX481CSA on RS485 shield. 

But you can view the schematic of RS485 shield, it only have a RS485 interface. The DB9 is also an RS485 interface.

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