Advantech AIMB-250 Series 2.4.20 Serial Port 3/4 Connector JCOM2, JCOM3, JCOM2 JCOM3, Signal

AIMB-250 Series

2.4.20Serial Port 3/4 Connector (JCOM2, JCOM3)

JCOM2

JCOM3

Signal	PIN	PIN	Signal
DCD	1	2	RxD
TxD	3	4	DTR
GND	5	6	DSR
RTS	7	8	CTS
RI	9	10	NC

2.4.20.1 Signal Description – Serial Port 2/3/4 Connector (JCOM1, JCOM2, JCOM3)

Signal		Signal Description
		Serial output. This signal sends serial data to the communication link. The signal is
TxD		set to a marking state on hardware reset when the transmitter is empty or when
		loop mode operation is initiated.
RxD	Serial input. This signal receives serial data from the communication link.
DTR		Data Terminal Ready. This signal indicates to the modem or data set that the
		on-board UART is ready to establish a communication link.
DSR		Data Set Ready. This signal indicates that the modem or data set is ready to
		establish a communication link.
RTS		Request To Send. This signal indicates to the modem or data set that the on-board
		UART is ready to exchange data.
CTS		Clear To Send. This signal indicates that the modem or data set is ready to
		exchange data.
DCD		Data Carrier Detect. This signal indicates that the modem or data set has detected
		the data carrier.
RI		Ring Indicator. This signal indicates that the modem has received a telephone
		ringing signal.

50 AIMB-250 Series User’s Manual