The main function of the TD301D485H-E / TD501D485H-E series is to convert a logic level signal intoisolated RS485 diferential level signals. The special integrated IC technology of the RS485 transceiverachieves isolation between the power supply and the signal lines isolation, does RS485communication and protects the bus all in one and the same module. The product's isolated powersupply withstands a test voltage of up to 3000VDC. Also, they can easily be embedded in the user'send equipment, to achieve fully functional RS485 network connections.