The CP-134 Universal PCI series is designed the new slot standard for expansion Boards and works with both 3.3V and 5.0V server slots.CP 132U offers two independent RS422 / 485, and each port can control up to 32 devices in a multidrop environment. Applications can easily manage the data transmitting and receiving of the half-duplex RS485 port without extra code via Automatic Data Direction Control (ADDC) intelligence. In addition, on-chip hardware flow control and built-in termination resistors guarantee data integrity.