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WD-Card is a Smart Universal PCI Multiport Serial Board designed for POS and ATM applications, and for use by industrial automation system manufacturers and system integrators. WD-Card is compatible with all popular operating systems, and each of its 2/4/8/16 RS-232 serial ports supports data rates of up to 921.6 Kbps, and provides full modem control signals, ensuring compatibility with a wide range of serial peripherals. In addition,WD-Card works with both 3.3V and 5V PCI buses, allowing the board to be installed in virtually any available PC server. WD系列聪明型PCI总线串口多用户卡适用于POS、ATM、工业自动控制等应用。本系列多用户卡支持绝大多数操作系统，它的每个端口支持高达921.6Kbps的速度，同时每个端口均为标准全信号RS232端口，提供调制解调器的所有控制信号，并于大多数串口设备兼容。
WD系列聪明型PCI总线串口多用户卡可工作在3.3V和5V PCI总线环境中，可被安装在所有的PC机、工控机中。 Over 800 Kbps data throughput, top performance in the world
Serial communication speed up to 921.6 Kbps
128-byte FIFO and on-chip H/W, S/W flow control
Universal PCI compatible, with 3.3/5V PCI and PCI-X
Low profile board for compact-sized PC
Windows 2003/XP/2000/98/ME, Linux, UNIX driver support
Single 5 VDC power requirement
On-board 15 KV ESD protection
Bus（总线）： 32-bit, Universal PCI
Serial（接口）： RS-232
No. of Ports（口数）： 2/4/8/16
Signals（信号）： TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
Speed（速度）： 50 bps to 921.6 Kbps
Parity(校验）： None, even, odd, space, mark
Data Bits（数据位）： 5, 6, 7, 8
Stop Bits（停止位）： 1, 1.5, 2
Flow Control(流量控制）：RTS/CTS, XON/XOFF
IRQ, I/O Address（中断和I/O地址）: Assigned by BIOS
Operating Systems（操作系统）: Windows NT/2000/XP/2003, Windows 95/98/ME, Linux 2.6/2.4(Red Hat, SuSe, etc.), FreeBSD, SCO OpecServer,SCO Unixware 7,SCO Unixware 2.1, Embedded Windows XP, QNX, DOS
Power Requirements(电源）：120 mA (+5V)
Operating Temperature（工作温度）： 0 to 55°C
Operating Humidity（工作湿度）：5 to 95% RH
Storage Temperature（存储温度）：-20 to 85°C
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