PCI Board

Empowering Innovations

VXC-144U/VXC-144iU/VEX-144/VEX-144i

VXC-144U/VXC-144iU/VEX-144/VEX-144i

The VXC-144U/VEX-144 card provides 4 non-isolated RS-422/RS-485 serial ports and the VXC-144iU/VEX-144i card provides 4 isolated RS-422/RS-485 serial ports which tolerate isolation voltage up to 2.5 kV. Each port can be configured as either RS-485 for half-duplex or RS-422 for full-duplex communication. It is equipped with a 128-byte hardware FIFO for each port, supports for speed up to 115200 bps and is capable of transmitting information over a long distance communication link.

Users may 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-422/485 port.

Specifications
Models VXC-144U VXC-144iU VEX-144 VEX-144i
Communication Port
COM1 ~ COM4 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.)
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 - 2500 VDC
ESD Protection - +/-4 kV - +/-4 kV
General
Bus Type Universal PCI, 3.3 V and 5 V, 33 MHz,
32-bit, Plug and Play mechanism
PCI Express x1, Plug and Play
COM-Selector Yes (8-bit DIP switch)
Connector Female DB-37
Power Consumption 120 mA @ 5 V 880 mA @ 5 V 120 mA @ 5 V 880 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) 142 mm x 84 mm x 22 mm 142 mm x 95 mm x 22 mm 114 mm x 101 mm x 22 mm