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The VXC-144U/VEC-144 card provides 4 non-isolated RS-422/RS-485 serial ports and the VXC-144iU/VEC-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 equips 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. In harsh industrial environments, the on board ESD protection component diverts the potentially damaging charge away from sensitive circuit and protects the computer and equipment from being damaged by high potential voltage. 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. |
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- Provides 4 RS-422/485 ports
- 128-byte Hardware FIFO for Each Port
- Built-in COM-Selector
- 128 KB Software Buffer (max.) for Each COM Port Under Windows
- Windows NT/2K/XP/2003 Driver Supported
- +/-4 kV ESD Protection for VXC-144(i)U/VEX-144i
- Short Card Design for VEX-144(i)
- Supports PCI Express x 1, Plug and Play for VEX-144(i)
- Supports 3.3 V/5 V PCI Bus, Plug and Play for VXC-144(i)U
- 2500 VDC Isolation for VXC-144iU/VEX-144i
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| Models |
VXC-144U |
VXC-144iU |
VEX-144 |
VEX-144i |
| 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 ~ 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 ~ +50 °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 | | |
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