Serial Communication Board with 1 Isolated RS-422/485 port and 1 RS-232 port

The VXC-182iAU serial card provides two communication ports, one is RS-422/485 and the other is RS-232 port. It can be configured as either RS-485 for half-duplex or RS-422 for full-duplex communication, supports for speed up to 115200 bps and is capable of transmitting information over a long distance communication link.

Users can specify a COM port number manually by setting DIP switch, or let the driver choose an available number automatically. The driver provides a maximum of 128 KB software FIFO for each COM port under Windows. It’s practical for large file transmission.

The data lines of each serial ports on i version VXC cards come with photocouplers design. The on-board photo couplers use a short optical transmission path to transfer a signal between elements of a circuit, and keep the data lines electrically isolated. It can help cutting down on ground loops, common mode voltages and block voltage spikes, provide electrical isolation, and offer significant protection from serious over-voltage conditions in one circuit affecting the other.

In harsh industrial environments, the on-board ESD protection component (for i version) diverts the potentially damaging charge away from sensitive circuit to protects the computer and equipment from the sudden and momentary electric current.

The serial communication card are designed for use with intelligent devices like bar code reader, serial printers, intelligent sensors, instrumentation equipment, computers and almost any device with an RS-232 port.


Request For Quotation



    • Industrial Machinery
    • Building Automation
    • Restaurant Appliances
    • Laboratory Equipment & Research
    • Industrial Communication


    • Provides 1 isolated RS-422/485 port and 1 RS-232 port
    • Built-in COM-Selector
    • +/-4 kV ESD Protection
    • 128 KB Software Buffer (max.) for Each COM Port Under Windows
    • Self-Tuner Inside[VXC-182iAU only]
    • Supports 3.3 V/5 V PCI bus, Plug and Play
    • 128-byte Hardware FIFO for Each Port
    • Short Card Design
    • 2500 VDC Isolation Isolated RS-422/485 port


    • Windows NT4/2000 drivers for VXC series.
    • Drivers for 32-bit Windows XP/2003/2008/7/8/10
    • Drivers for 64-bit Windows XP/2003/2008/7/8/10
    • Driver for Linux

    Hardware Specifications

    Communication Port
    COM1 RS-422/485 The RS-422 and RS-485 cannot be used simultaneously
    RS-422 TxD+, TxD-, RxD-, RxD+, RTS+, RTS-, CTS+, CTS-, GND
    RS-485 2-Wire Data+, Data-, GND
    Bias Resistor Yes, 1 KΩ
    Node 256 (max.)
    COM2 RS-232 RxD, TxD, CTS, RTS, DSR, DTR, DCD, RI, GND
    UART 16C950 compatible
    Baud Rate 50 – 115200 bps
    Data bit 5, 6, 7, 8
    Stop bit 1, 1.5, 2
    Parity None, Even, Odd, Mark, Space
    FIFO Internal 128 bytes
    Isolated 2500 VDC for RS-422/485 port
    Bus Type Universal PCI, 3.3 V and 5 V, 33 MHz, 32-bit, Plug and Play mechanism
    COM-Selector Yes (8-bit DIP switch)
    Connector 2 x DB9 (Male)
    Power Consumption 200 mA @ 5 V
    Operating Temperature 0 °C ~ +60 °C
    Storage Temperature -20 °C ~ +70 °C
    Humidity 0 ~ 90% RH, non-condensing
    Dimensions (L x W x D) 134 mm x 90 mm x 22 mm

    Ordering Informations

    VXC-182iAU CR Universal PCI Bus, Serial Communication Board with 1 Isolated RS-422/485 port and 1 RS-232 port (RoHS)