ADS Technologies manual Serial PortsCOM1~4, COM2 RS-232 Serial port Pin Header, AR-B185114

AR-B1851 User’s Guide

3.2 Serial Ports(COM1~4)

The AR-B1851 offers two high speeds NS16C550 compatible UARTs with Read/Receive 16 byte FIFO serial ports.

• COM2 : RS-232 Serial port (Pin Header)

PIN	DESCRIPTION	PIN	DESCRIPTION
1	-DCD	2	-DSR
3	RXD	4	-RTS
5	TXD	6	-CTS
7	-DTR	8	-RI
9	GND	10	NC

• COM1 : RS-232 with RS-422/485 Serial port(Pin Header)

PIN	DESCRIPTION	PIN	DESCRIPTION
1	-DCD	2	-DSR
3	RXD	4	-RTS
5	TXD	6	-CTS
7	-DTR	8	-RI
9	GND	10	GND
11	TX+	12	TX-
13	RX+	14	RX-

AR-B185114