Supports different operation modes

RS-422 Point to Point
RS-422 Multi-Drop
RS-485 2 wire Multi-Drop
RS-485 4 wire Multi-Drop

Chipset : Systembase SB16C1052PCI
Support Low Profile
Communication speed Maximum 921.6K BPS
PCI Bus 33MHz Ver 3.0, 2.3, 2.2 & 2.1 specifications
Circuit interface RS422/RS485
Communication controller 16C1050 FIFO up to 256 byte
Connector DB25
I/O address and IRQ assigned by BIOS
64 bit and 32bit PCI bus slot
Built-in 15KV EDS protection for each port
Driver for Microsoft Windows, Linux, and DOS
Certified for CE, FCC, RoHS
Microsoft WHQL Approval Driver
Long distance up to 4000ft

Bus : 32bit Universal PCI
Connector for External : DB25F
Serial Standards : RS-422/485
Number of Ports : 2
Serial Line Protection: ESD protection 15KV on the board
Baud rate : 75 bps to 921.6 Kbps
Data bit : 4, 5, 6, 7, 8
Stop Bits : 1, 1.5, 2
Parity : None, Even, Odd, Space, Mark
Flow Control : RTS/CTS, XON, XOFF
I/O Address : Assigned by Bios
IRQ : Assigned by Bios

Serial Signals
RS422 :       TxD+, TxD-, RxD+, RxD-, GND
RS485 4W : TxD+, TxD-, RxD+, RxD-, GND
RS485 2W : Data+, Data-, GND

DB9M connector pin assignments

DB9F to 5pin Terminal Block Surge Adapter Pins

Working temperature : -30ºC ~ 75ºC
Storage temperature : -40ºC ~ 85ºC
Microsoft Windows : XP, 2000, Vista, 2008, Win 7