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PCI Express Bus, Serial Communication Board with 2 Isolated RS-422/485 ports, supports operating temperatures from 0 °C ~ +60 °C


PCI Express Bus, Serial Communication Board with 2 Isolated RS-422/485 ports, supports operating temperatures from 0 °C ~ +60 °C

  Price:  $279.00  

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The VXC-142 series card provides two RS-422/RS-485 serial ports. Each port can be configured as either RS-485 for half-duplex or RS-422 for full-duplex communication. It supports speeds up to 115200 bps and supports full-duplex communication.

Users may specify a COM port number manually by setting a 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 charges away from sensitive circuits to protect the computer and equipment from sudden and momentary electric current.

The serial communication cards 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-422/RS-485 port.

  • Provides 2 RS-422/485 ports
  • Built-in COM-Selector
  • +/-4 kV ESD Protection
  • 128 KB Software Buffer (max.) for Each COM Port Under Windows
  • 2500 VDC Isolation for i versions
  • Short Card Design
  • Supports PCI Express, Plug and Play for VEX-142(i)


  • Drivers for 32-bit Windows XP/2003/2008/Vista/7
  • Drivers for 64-bit Windows XP/2003/2008/Vista/7


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


Communication Port
COM1 ~ COM2 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 Data+, Data-, GND
UART 16C950 compatible
Baud Rate 50 - 921600 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
Bus Type Universal PCI, 3.3 V and 5 V, 33 MHz, 32-bit, Plug and Play
COM-Selector Yes (8-bit DIP switch)
Connector 2 x Male DB-9
Power Consumption 440 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) 110 mm x 94 mm x 22 mm

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