#4 RS-485/422 Over USB Isolated Multiport


IP Electronix PH485Ux4 is a USB Adapter Multiport that provides #4 Serial COM Ports via its USB connection and is compatible with RS-485 standard devices differential (Data+ & Data-); and RS-422 standard devices differential (TX+, TX- & RX+, RX-) signals. PH485Ux4 is fully Plug & Play a and enables your laptop or workstation with the ability to communicate between a USB port and up to #4 RS-485/422 serial peripherals with baud-rate from 300bps to 230400bps simultaneously.

PH485Ux4 supports Point-to-Point and Point-to-Multi Point Party Line network topologies. Since RS-485 is a Half-Duplex standard, switching between Transmit and Receive is doing automatically and no further signal (such as RTS) is required.

PH485Ux4 supports a wide range power supply and is working with DC voltage between 8V to 48V. Protection against Surge, ESD and EMI is considered in its design and also has 3kV insulation between USB and RS-485/422 sides. Furthermore, all the ports are insulated from each other too.

PH485Ux4 is designed for industrial usage and is useful for Industrial Automation, Telecommunications, SCADA Systems and DCS Systems …

PH485Ux4 comes complete with drivers for Microsoft Windows. Drivers are also available for Linux, Mac OS and Android.


  • USB to RS-485 and RS-422 Bidirectional Converter;
  • Hi-Speed USB 2.0 supported (up to 480 Mbps);
  • Number of Ports: #4 RS-485/RS422 Serial Port, #1 USB Port;
  • Adds #4 COM Port to the PC;
  • Fully Plug & Play;
  • RS-485 Signal: Data+, Data-, GND;
  • RS-422 Signal: TX+, TX-, RX+, RX-, GND;
  • Maximum Communication Distance: 1200m (4000 feet);
  • Loading: RS-485 and RS-422 Side up to 32 Nodes are supported;
  • Self-Powered: works by 8V to 48V external DC power supply;
  • Serial Transmission Speed Up to 230.4 kbps;
  • Insulation Protection: 3kV Instantaneous, 500V DC continuous;
  • Serial Standard: Meets or Exceeds the Requirements of RS-485/RS-422 Standards;
  • RS-485/422 Parity: Even, Odd, None, Mark and Space; Selectable;
  • Driver Supported: Microsoft Windows, Linux, Mac OS and Android (32 & 64 Bits) Operating Systems;
  • Power & USB (Green) LED Indicator;
  • Transmit (Blue) and Receive (Yellow) LED Indicator;
  • ESD Protection: RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM);
  • Dimensions: 218mm x 122mm x 30mm (8.58in x 4.80in x 1.18 in);
  • Operating Temperature: -10°C to +70°C (+14°F to +158°F);
  • 1 Year Guarantee and 5 Years Support.

User's Manual Data Sheet Driver