The TD331S232H / TD531S232H series of isolated single high speed 232 transceivers are all-in-onemodules with isolated power supply, isolated sianal and RS232 transceiver chip integrated in oneRS232 interface solution. The main product function is to switch from logic level to 232 protocols leveland achieving signal isolation and the product features a constant-voltage source isolated powersupply which withstands a test voltage of 2500 VDC. The products also can easily be embedded in theuser's end equipment, to achieve fully functional RS232 protocols network connections.