[General]
Interface Type :  RS-422A or RS-485
Number of Ports Per Card : 2
Maximum Transfer Distance : 4000ft.
Baud Rate : 50 to 115.2K
Parity : none, even, odd, mask or space
Data Bits :  5, 6, 7 or 8 bits
Stop Bits : 1, 1.5 or 2 bits
Port Signal : TXD, RXD, CTS and RTS
Connector : D-type, 9 pin, female
UART : 16C550
Output Driver : SN75175 or SN75173
Input Driver : SN75174 or SN75172
Input Resistance : RS-422 4K ohm; RS-485 12K ohm
Termination Resistor : 120 ohm
Signal Isolator :  PC900 for TXD and RXD, 4N35 for CTS and RTS, 5000Vrms isolation
Power Isolator : DC to DC converter, 500 VDC isolation
Bus Type : 8 bit ISA bus (If only first 4 IRQ used) 16 bit ISA bus (If 8 IRQ used)
Interrupt Channel  : IRQ 2(9), 3, 4, 5, 10, 11, 12 and 15
Power Requirement : 5VDC/250mA

[Physical and Environmental]
Operating Temperature : 0~60°C(32~140°F)
Storage Temperature : -28~85°C(-18.4~185°F)
Operating Humidity :  0% to 95%, non-condensing
Dimension : 175mm x 107mm
Packing List  : Utility Disk, Manual