SUNIX Serial Communication Boards family provides an array of PCI Express, PCI, PCI/104 interfaces to meet your serial port expansion needs. Multi-port Serial Communication Board comes in the selection of 4 ports in choice of RS-232, RS422/485 or 3-in-1 combo with DB9 or DB25 serial connectors and compatible with all major operating systems for industrial applications. The Serial Boards series is best suited for applications where the CPU is able to devote some of its resources to handling computations or to real time applications that require short latency intervals. SUNIX boards offers “Auto Detect and Switching RS-422/485” technology, which can automatically detects the state of RS-422 full duplex or RS-485 half duplex and control the data transmitter and receiver wires at the same port without any jumper setting. This design gives users the convenience and hassle free option to change the communication mode settings. SUNIX has also developed a hardware technology called Auto Hardware Direction Control/Carrier Sense (AHDC/CS™), which is to control the direction of signals (ON or OFF) automatically in 2-wire RS-485 mode. This can precisely control the transmitting signals during the start and end of data transmission.
Supports 4 independent RS-232/422/485 serial ports.
High reliability SUN1989 16C950 compatible UART controller on-board.
Compliance with PCI Express 1.1 BUS specifications.
RS-422/485 auto detect and switching technology – jumper and software free.
AHDC/CSTM technology for collision free communication
Ultra low power consumption design for Green Environment.
Built-in 15KV ESD protection for all serial signals meets IEC1000-4-2 standard.
Plug-n-Play, I/O address and IRQ assigned by BIOS
Certified by CE, FCC, RoHS, and Microsoft WQHL approval
Support Microsoft Windows, Linux, and DOS
Industrial 4 ports RS-232 / 422 / 485(3 in 1) PCI-E Serial Card
PCI Express Bus Spec. Revision 1.0a
No. of Port
Max No. of System
Unlimited (only limitation is availability of PCI-E slots on the system)
1-Lane PCI Express
Assigned by System
Assigned by System
64 byte (Hardware), 16C750 Compatible
RS-232 : TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
RS-422 : TxD+, TxD-, RxD+, RxD-, GND
4 Wire RS-485 : TxD+, TxD-, RxD+, RxD-, GND
2 Wire RS-485 : Data+, Data-, GND
75 bps to 921.6 Kbps
None, Even, Odd, Space, Mark
RTS / CTS ( Hardware for RS-232 only ) / XON/XOFF ( Software )
Embedded 15 KV ESD Protection
SUNIX AHDC/CS™ Technology
Select RS-422 / 485
RS-422 / 485 Auto Detect and Switch
Linux 2.4/2.6/3, Windows 2000/XP(32-64bit)/ 2003(32-64bit) /Vista (32-bit), DOS