The main function of the TD311P485H / TD511P485H series is to convert a logic level signal into isolatedRS485 diferential level signals. The special integrated IC technology of the RS485 transceiver achievesisolation between the power supply and the signal lines isolation, does RS485 communication andprotects the bus all in one and the same module. The product's isolated power supply withstands a testvoltage of up to 2500VDC. lt has two way independent of RS485 network function, and the two-portRS485 networks are isolated. Also, they can easily be embedded in the user's end eguipment, to achievefully functional RS485 network connections.