The following table provides the pin assignments for the Alliance EDAS hardware. The EDAS unit has a standard DB9 interface. For most applications that do not require flow control you can use just the transmit and receive pins.

 

EDAS DB9 Pin	Usage
1	DCD
2	RX (receive)
3	TX (transmit)
4	DTR
5	GND
6	DSR
7	RTS
8	CTS
9	RI (reverse interrupt)