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VEX-142 CR PCI Express, Serial Communication Board with 2 RS-422/485 ports (RoHS)
VEX-142 CR: Card PCI Express 2 cổng RS-422/485
The VEX-142 series card provides 2 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 for speed up to 115200 bps and supports full-duplex communication.
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 VEX 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.
|COM-Selector||Yes (8-bit DIP switch)|
|Connector||2 x DB9 (Male)|
|Ports||2 x RS-422/485 (RS-422: TxD+, TxD-, RxD+, RxD-, RTS+, RTS-, CTS+, CTS-, GND / RS-485: Data+, Data-, GND)|
|Baud Rate||50 - 115200 bps|
|Parity||None, Even, Odd, Mark, Space|
|Data Bit||5, 6, 7, 8|
|Stop Bit||1, 1.5, 2|
|FIFO Size||Internal 128 bytes|
|Consumption||120 mA @ 5 V|
|Dimensions (mm)||94 x 110 x 22 (W x L x D)|
|Operating Temperature||0 ~ +60°C|
|Storage Temperature||-20 ~ +70°C|
|Humidity||5 ~ 85% RH, Non-condensing|
|VEX-142 CR||PCI Express, Serial Communication Board with 2 RS-422/485 ports (RoHS)|