Ampro Corporation P5X manual RS-485 Option, DB9

Little Board/P5x Technical Manual

Table 2– 11. Serial Port Connectors (J11, J13)

		Signal			DB25	DB9
Ports	Pin	Name	Function	In/Out	Pin	Pin
	1	DCD	Data Carrier Detect	IN	8	1
Serial 1	2	DSR	Data Set Ready	IN	6	6
(J11)	3	RXD	Receive Data	IN	3	2
or	4	RTS	Request To Send	OUT	4	7
Serial 3
(J13)	5	TXD	Transmit Data	OUT	2	3
	6	CTS	Clear to Send	IN	5	8
	7	DTR	Data Terminal Ready	OUT	20	4
	8	RI	Ring Indicator	IN	22	9
	9	GND	Signal Ground	-	7	5
	10	N/A	No Connection	-	-	-
	11	DCD*	Data Carrier Detect*	IN	8	1
Serial 2	12	DSR	Data Set Ready	IN	6	6
(J11)	13	RXD	Receive Data	IN	3	2
or	14	RTS	Request To Send	OUT	4	7
Serial 4
(J13)	15	TXD	Transmit Data	OUT	2	3
	16	CTS	Clear to Send	IN	5	8
	17	DTR	Data Terminal Ready	OUT	20	4
	18	RI	Ring Indicator	IN	22	9
	19	GND	Signal Ground	-	7	5
	20	TXT	TxD at TTL level	-	-	-

Table 2– 12. J11 and J13 Mating Connector

Connector Type	Mating Connector
RIBBON	3M 3421-7600
	Latching Clip 3505-8020
DISCRETE WIRE	MOLEX HOUSING 22-55-2202
	PIN 16-02-0103

RS-485 Option

You can configure Serial 1 to operate as a two-wire RS-485 port. Use of the RS-485 option offers a low cost, easy-to-use communications and networking multi-drop interface that is suited to a wide

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